:root{--med-font:"Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--med-fg:#3e69ae;--med-fg-soft:#517fbe;--med-muted:#6699cf;--med-muted-light:#73b2de;--med-text:#1e3a5f;--med-text-secondary:#5b7a9d;--med-bg:#f7fbff;--med-bg-warm:#fff;--med-surface:#fff;--med-primary:#3e69ae;--med-primary-hover:#2f548f;--med-primary-weak:#dceefe;--med-primary-mid:#73b2de;--med-accent:#73b2de;--med-border:#b9d8f2;--med-border-soft:#dceefe;--med-footer:#2f548f;--med-footer-elevated:#3e69ae;--med-on-footer:#fff;--med-on-footer-muted:#dceefe;--med-on-footer-link:#73b2de;--med-shadow:0 12px 40px #3e69ae1f;--med-shadow-sm:0 4px 18px #3e69ae1a;--med-radius:14px;--med-radius-sm:11px;--med-radius-pill:999px;--med-primary-border:#73b2de;--med-nav-active-start:#fff;--med-nav-active-end:#dceefe}*,:before,:after{box-sizing:border-box}@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}body{font-family:var(--med-font);color:var(--med-text);background:var(--med-bg);-webkit-font-smoothing:antialiased;margin:0;line-height:1.55}#root{max-width:none;min-height:100vh;margin:0}.adm{--adm-sidebar-w:248px;--adm-header-h:64px;--adm-radius:12px;--adm-shadow:0 1px 3px #2f548f14, 0 8px 24px #2f548f0f;--adm-text:#1e3a5f;--adm-text-muted:#5b7a9d;--adm-border:#d4e4f4;--adm-surface:#fff;--adm-bg:#eef4fb;--adm-primary:#3e69ae;--adm-primary-soft:#e8f2fc;--adm-success:#059669;--adm-warning:#d97706;--adm-danger:#dc2626;background:var(--adm-bg);min-height:100vh;color:var(--adm-text);display:flex}.adm-sidebar{z-index:40;width:var(--adm-sidebar-w);background:var(--adm-surface);border-right:1px solid var(--adm-border);height:100vh;box-shadow:var(--adm-shadow);flex-direction:column;transition:transform .22s;display:flex;position:fixed;top:0;left:0}.adm-sidebar-brand{border-bottom:1px solid var(--adm-border);padding:20px 20px 16px}.adm-sidebar-brand strong{letter-spacing:-.02em;font-size:1.05rem;display:block}.adm-sidebar-brand span{color:var(--adm-text-muted);text-overflow:ellipsis;white-space:nowrap;margin-top:4px;font-size:12px;display:block;overflow:hidden}.adm-nav{flex-direction:column;flex:1;gap:4px;padding:12px 10px;display:flex;overflow-y:auto}.adm-nav-item{width:100%;color:var(--adm-text-muted);font:inherit;text-align:left;cursor:pointer;background:0 0;border:none;border-radius:10px;align-items:center;gap:10px;padding:11px 14px;font-size:14px;font-weight:600;transition:background .15s,color .15s;display:flex}.adm-nav-item:hover{background:var(--adm-primary-soft);color:var(--adm-primary)}.adm-nav-item.active{background:var(--adm-primary-soft);color:var(--adm-primary);box-shadow:inset 3px 0 0 var(--adm-primary)}.adm-nav-icon{text-align:center;flex-shrink:0;width:20px;font-size:16px}.adm-nav-badge{background:var(--adm-danger);color:#fff;border-radius:999px;justify-content:center;align-items:center;min-width:20px;height:20px;margin-left:auto;padding:0 6px;font-size:11px;font-weight:700;display:inline-flex}.adm-sidebar-foot{border-top:1px solid var(--adm-border);flex-direction:column;gap:6px;padding:12px 10px 16px;display:flex}.adm-sidebar-link{color:var(--adm-text-muted);border-radius:10px;padding:10px 14px;font-size:14px;font-weight:500;text-decoration:none;display:block}.adm-sidebar-link:hover{background:var(--adm-primary-soft);color:var(--adm-primary)}.adm-sidebar-btn{border:1px solid var(--adm-border);background:var(--adm-surface);color:var(--adm-text-muted);font:inherit;cursor:pointer;text-align:left;border-radius:10px;padding:10px 14px;font-size:14px;font-weight:500}.adm-sidebar-btn:hover{border-color:var(--adm-primary);color:var(--adm-primary)}.adm-main{margin-left:var(--adm-sidebar-w);flex-direction:column;flex:1;min-width:0;display:flex}.adm-topbar{z-index:30;min-height:var(--adm-header-h);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--adm-border);background:#ffffffeb;align-items:center;gap:12px;padding:0 24px;display:flex;position:sticky;top:0}.adm-menu-toggle{border:1px solid var(--adm-border);background:var(--adm-surface);font:inherit;cursor:pointer;border-radius:8px;padding:8px 12px;display:none}.adm-page-title{letter-spacing:-.02em;margin:0;font-size:1.15rem;font-weight:700}.adm-page-desc{color:var(--adm-text-muted);margin:2px 0 0;font-size:13px}.adm-body{flex:1;padding:24px}.adm-overlay{display:none}.adm-toast-stack{z-index:100;flex-direction:column;gap:8px;max-width:min(360px,100vw - 32px);display:flex;position:fixed;bottom:24px;right:24px}.adm-toast{border-radius:var(--adm-radius);background:var(--adm-text);color:#fff;padding:14px 16px;font-size:14px;animation:.25s adm-toast-in;box-shadow:0 12px 32px #0000002e}.adm-toast.success{background:#065f46}.adm-toast.error{background:#991b1b}@keyframes adm-toast-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.adm-alert{border-radius:var(--adm-radius);margin-bottom:16px;padding:12px 16px;font-size:14px}.adm-alert.warn{color:#92400e;background:#fffbeb;border:1px solid #fde68a}.adm-stats{grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px;display:grid}.adm-stat{background:var(--adm-surface);border:1px solid var(--adm-border);border-radius:var(--adm-radius);box-shadow:var(--adm-shadow);padding:16px 18px}.adm-stat-value{color:var(--adm-primary);font-size:1.75rem;font-weight:700;line-height:1.1}.adm-stat-label{color:var(--adm-text-muted);margin-top:4px;font-size:13px}.adm-card{background:var(--adm-surface);border:1px solid var(--adm-border);border-radius:var(--adm-radius);box-shadow:var(--adm-shadow)}.adm-guide{margin-bottom:20px;overflow:hidden}.adm-guide-toggle{background:var(--adm-surface);width:100%;font:inherit;text-align:left;cursor:pointer;color:var(--adm-text);border:none;justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;font-size:14px;font-weight:600;display:flex}.adm-guide-toggle:hover{background:var(--adm-primary-soft)}.adm-guide-body{border-top:1px solid var(--adm-border);padding:0 18px 16px}.adm-steps{grid-template-columns:repeat(3,1fr);gap:12px;margin:16px 0 0;display:grid}.adm-step{border:1px solid var(--adm-border);color:var(--adm-text-muted);background:#f8fbff;border-radius:10px;padding:12px 14px;font-size:13px;line-height:1.45}.adm-step.active{border-color:var(--adm-primary);background:var(--adm-primary-soft);color:var(--adm-text)}.adm-step.done{color:var(--adm-success);background:#ecfdf5;border-color:#6ee7b7}.adm-step-num{background:var(--adm-border);width:22px;height:22px;color:var(--adm-text);text-align:center;border-radius:50%;margin-bottom:6px;font-size:12px;font-weight:700;line-height:22px;display:inline-block}.adm-step.active .adm-step-num,.adm-step.done .adm-step-num{background:var(--adm-primary);color:#fff}.adm-step.done .adm-step-num{background:var(--adm-success)}.adm-breadcrumb{background:var(--adm-primary-soft);color:var(--adm-primary);border-radius:8px;margin:12px 0 0;padding:10px 14px;font-size:13px;font-weight:500}.adm-grid-3{grid-template-columns:repeat(3,minmax(0,1fr));align-items:start;gap:16px;display:grid}.adm-panel{min-height:320px;padding:18px}.adm-panel.is-disabled{opacity:.55;pointer-events:none}.adm-panel-head{border-bottom:1px solid var(--adm-border);gap:12px;margin-bottom:16px;padding-bottom:14px;display:flex}.adm-panel-head h2{margin:0 0 4px;font-size:1rem}.adm-panel-head p{color:var(--adm-text-muted);margin:0;font-size:13px}.adm-form{flex-direction:column;gap:10px;margin-bottom:16px;display:flex}.adm-form-row{grid-template-columns:1fr 88px auto;align-items:end;gap:10px;display:grid}.adm-field label{color:var(--adm-text-muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px;font-size:12px;font-weight:600;display:block}.adm-field input{border:1px solid var(--adm-border);width:100%;font:inherit;background:#fff;border-radius:8px;padding:10px 12px;font-size:14px;transition:border-color .15s,box-shadow .15s}.adm-field input:focus{border-color:var(--adm-primary);outline:none;box-shadow:0 0 0 3px #3e69ae26}.adm-field input:disabled{cursor:not-allowed;background:#f1f5f9}.adm-btn{font:inherit;cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:10px 16px;font-size:14px;font-weight:600;transition:background .15s,transform .1s;display:inline-flex}.adm-btn:active:not(:disabled){transform:scale(.98)}.adm-btn:disabled{opacity:.5;cursor:not-allowed}.adm-btn-primary{background:var(--adm-primary);color:#fff}.adm-btn-primary:hover:not(:disabled){background:#2f548f}.adm-btn-secondary{background:var(--adm-primary-soft);color:var(--adm-primary)}.adm-btn-ghost{color:var(--adm-text-muted);border:1px solid var(--adm-border);background:0 0}.adm-btn-sm{padding:6px 10px;font-size:13px}.adm-list{flex-direction:column;gap:6px;max-height:420px;margin:0;padding:0;list-style:none;display:flex;overflow-y:auto}.adm-list-item{align-items:stretch;gap:6px;display:flex}.adm-list-item.is-editing{flex-direction:column}.adm-list-actions{flex-direction:column;flex-shrink:0;gap:4px;display:flex}.adm-list-edit{border:1px solid var(--adm-primary);background:var(--adm-primary-soft);border-radius:8px;flex-direction:column;flex:1;gap:8px;padding:10px 12px;display:flex}.adm-list-edit input{border:1px solid var(--adm-border);width:100%;font:inherit;background:#fff;border-radius:8px;padding:10px 12px;font-size:14px}.adm-list-edit-actions{flex-wrap:wrap;gap:8px;display:flex}.adm-lesson.is-editing{flex-direction:column;align-items:stretch}.adm-lesson-edit{border:1px solid var(--adm-primary);background:var(--adm-primary-soft);border-radius:8px;flex-direction:column;gap:10px;width:100%;padding:12px;display:flex}.adm-lesson-edit .adm-form-row{margin-bottom:0}.adm-list-btn{border:1px solid var(--adm-border);font:inherit;text-align:left;cursor:pointer;background:#fff;border-radius:8px;flex-direction:column;flex:1;align-items:flex-start;gap:2px;padding:10px 12px;transition:border-color .15s,background .15s;display:flex}.adm-list-btn:hover{border-color:var(--adm-primary);background:var(--adm-primary-soft)}.adm-list-btn.active{border-color:var(--adm-primary);background:var(--adm-primary-soft);box-shadow:inset 0 0 0 1px var(--adm-primary)}.adm-list-btn strong{font-size:14px;font-weight:600}.adm-list-btn span{color:var(--adm-text-muted);font-size:12px}.adm-reorder{flex-direction:column;gap:2px;display:flex}.adm-reorder button{border:1px solid var(--adm-border);min-width:32px;color:var(--adm-text-muted);cursor:pointer;background:#fff;border-radius:6px;flex:1;padding:4px;font-size:12px}.adm-reorder button:hover{border-color:var(--adm-primary);color:var(--adm-primary)}.adm-empty{text-align:center;color:var(--adm-text-muted);padding:32px 16px;font-size:14px;line-height:1.5}.adm-empty-icon{opacity:.5;margin-bottom:8px;font-size:2rem}.adm-lesson-list{flex-direction:column;gap:8px;max-height:480px;margin:0;padding:0;list-style:none;display:flex;overflow-y:auto}.adm-lesson{border:1px solid var(--adm-border);background:#fafcff;border-radius:10px;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;display:flex}.adm-lesson-meta{color:var(--adm-text-muted);margin-top:4px;font-size:12px}.adm-badge{border-radius:999px;padding:2px 8px;font-size:11px;font-weight:600;display:inline-block}.adm-badge.ok{color:#065f46;background:#d1fae5}.adm-badge.pending{color:#92400e;background:#fef3c7}.adm-badge.trial{color:#475569;background:#f1f5f9}.adm-btn-trial-active{color:#fff;background:#475569;border-color:#475569}.adm-btn-trial-active:hover{background:#334155}.adm-upload{color:var(--adm-primary);cursor:pointer;white-space:nowrap;font-size:13px;font-weight:600}.adm-upload:hover{text-decoration:underline}.adm-upload.done{color:var(--adm-success)}.adm-search{border:1px solid var(--adm-border);width:100%;max-width:320px;font:inherit;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%235b7a9d' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85zm-5.242 1.1a5.5 5.5 0 1 1 0-11 5.5 5.5 0 0 1 0 11z'/%3E%3C/svg%3E") 12px no-repeat;border-radius:8px;margin-bottom:0;padding:10px 12px 10px 36px;font-size:14px}.adm-search-wrap{width:100%;margin-bottom:12px;position:relative}.adm-search-wrap .adm-search{max-width:none}.adm-search-wrap--panel .adm-search{margin-bottom:0}.adm-search-suggestions{z-index:30;border:1px solid var(--adm-border);background:#fff;border-radius:8px;max-height:240px;margin:0;padding:4px;list-style:none;position:absolute;top:calc(100% + 4px);left:0;right:0;overflow-y:auto;box-shadow:0 8px 24px #0f28501f}.adm-search-suggestion{width:100%;font:inherit;text-align:left;cursor:pointer;color:inherit;background:0 0;border:none;border-radius:6px;flex-direction:column;align-items:flex-start;gap:2px;padding:8px 10px;font-size:13px;display:flex}.adm-search-suggestion:hover,.adm-search-suggestion.active{background:var(--adm-primary-soft)}.adm-search-suggestion-label{color:var(--adm-text);font-weight:600}.adm-search-suggestion-meta{color:var(--adm-text-muted);font-size:12px}.adm-catalog-global-search{margin-bottom:16px}.adm-table-wrap{border:1px solid var(--adm-border);border-radius:var(--adm-radius);overflow-x:auto}.adm-table{border-collapse:collapse;width:100%;font-size:14px}.adm-table th,.adm-table td{text-align:left;border-bottom:1px solid var(--adm-border);padding:12px 14px}.adm-table th{text-transform:uppercase;letter-spacing:.04em;color:var(--adm-text-muted);background:#f8fbff;font-size:12px;font-weight:600}.adm-table tbody tr:hover{background:#f8fbff}.adm-table tbody tr:last-child td{border-bottom:none}.adm-tag{border-radius:999px;padding:3px 10px;font-size:12px;font-weight:600;display:inline-block}.adm-tag-free{color:#64748b;background:#f1f5f9}.adm-tag-basic{color:#1d4ed8;background:#dbeafe}.adm-tag-premium{color:#6d28d9;background:#ede9fe}.adm-tag-mentor{color:#be185d;background:#fce7f3}.adm-tag-admin{color:#b45309;background:#fef3c7}.adm-tag-banned{color:#b91c1c;background:#fee2e2}.adm-tag-active{color:#15803d;background:#dcfce7}.adm-nav-badge-warn{background:#f59e0b}.adm-row-banned{opacity:.72}.adm-row-multi-device td{background:#fef2f2}.adm-row-multi-device td:first-child{box-shadow:inset 3px 0 #dc2626}.adm-tag-multi-device{color:#b91c1c;background:#fee2e2}.adm-device-count-btn{font:inherit;color:#dc2626;cursor:pointer;text-underline-offset:2px;background:0 0;border:none;padding:0;font-weight:700;text-decoration:underline}.adm-device-count-link{font:inherit;color:inherit;cursor:pointer;text-underline-offset:2px;background:0 0;border:none;padding:0;text-decoration:underline}.adm-btn-danger-text{color:#dc2626}.adm-devices-layout{flex-direction:column;gap:20px;display:flex}.adm-devices-panel{padding:20px}.adm-devices-panel-head{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.adm-devices-empty{text-align:center;color:var(--adm-text-muted);margin:0;padding:24px 0}.adm-devices-list{flex-direction:column;gap:16px;display:flex}.adm-device-card{border:1px solid var(--adm-border);background:#fff;border-radius:12px;padding:16px}.adm-device-card-warn{background:snow;border-color:#fecaca}.adm-device-card-focus{box-shadow:0 0 0 2px #f87171}.adm-device-card-head{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px;display:flex}.adm-device-card-meta{color:var(--adm-text-muted);margin:4px 0 0;font-size:13px}.adm-device-card-actions{margin-top:12px}.adm-device-table th,.adm-device-table td{font-size:13px}.adm-device-id{background:#f8fafc;border-radius:6px;padding:2px 6px;font-size:12px}.adm-table-actions{flex-wrap:wrap;justify-content:flex-end;gap:6px;display:flex}.adm-btn-danger{color:var(--adm-danger)}.adm-btn-danger:hover:not(:disabled){background:#fef2f2}.adm-security-alerts{background:#fffbeb;border:1px solid #fcd34d;margin-bottom:20px;padding:16px 20px}.adm-security-alerts-head{color:#92400e;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.adm-security-alerts-loading{color:#b45309;font-size:12px;font-weight:500}.adm-security-alerts-list{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.adm-security-alert-item{background:#ffffffb3;border:1px solid #fde68a;border-radius:10px;justify-content:space-between;align-items:flex-start;gap:12px;padding:12px 14px;display:flex}.adm-security-alert-msg{color:#78350f;margin:0 0 4px;font-size:14px}.adm-security-alert-meta{color:#a16207;margin:0;font-size:12px}.adm-security-alert-actions{flex-shrink:0;gap:6px;display:flex}.adm-split{grid-template-columns:1fr 1fr;gap:20px;display:grid}.adm-news-layout{grid-template-columns:minmax(280px,380px) 1fr;align-items:start;gap:20px;display:grid}.adm-textarea{border:1px solid var(--adm-border);width:100%;font:inherit;resize:vertical;border-radius:8px;min-height:140px;padding:10px 12px;font-size:14px}.adm-textarea:focus{border-color:var(--adm-primary);outline:none;box-shadow:0 0 0 3px #3e69ae26}.adm-checkbox{align-items:center;gap:10px;font-size:14px;font-weight:500;display:flex}.adm-chat-layout{grid-template-columns:260px 1fr;gap:16px;min-height:480px;display:grid}.adm-chat-users{flex-direction:column;gap:8px;max-height:520px;display:flex;overflow-y:auto}.adm-chat-main{border:1px solid var(--adm-border);border-radius:var(--adm-radius);background:#fff;flex-direction:column;display:flex;overflow:hidden}.adm-chat-messages{background:#f8fbff;flex-direction:column;flex:1;gap:10px;min-height:360px;max-height:420px;padding:16px;display:flex;overflow-y:auto}.adm-chat-compose{border-top:1px solid var(--adm-border);background:#fff;flex-direction:column;gap:10px;padding:14px;display:flex}.adm-spinner{border:2px solid var(--adm-border);border-top-color:var(--adm-primary);border-radius:50%;width:18px;height:18px;animation:.7s linear infinite adm-spin;display:inline-block}@keyframes adm-spin{to{transform:rotate(360deg)}}.adm-loading-block{color:var(--adm-text-muted);align-items:center;gap:10px;padding:24px;font-size:14px;display:flex}.adm-login{background:linear-gradient(145deg,#1e3a5f 0%,#3e69ae 100%);justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.adm-login-box{background:#fff;border-radius:16px;width:100%;max-width:400px;padding:32px;box-shadow:0 24px 48px #0003}.adm-login-box h1{margin:0 0 8px;font-size:1.35rem}.adm-login-box .adm-back{color:var(--adm-primary);margin-bottom:20px;font-size:14px;font-weight:500;text-decoration:none;display:inline-block}.adm-login-form{flex-direction:column;gap:16px;margin-top:20px;display:flex}.adm-login-error{color:#991b1b;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:10px 12px;font-size:14px}@media (width<=1100px){.adm-grid-3,.adm-steps,.adm-form-row,.adm-news-layout,.adm-split,.adm-chat-layout,.adm-stats{grid-template-columns:1fr}}@media (width<=900px){.adm-sidebar{transform:translate(-100%)}.adm-sidebar.open{transform:translate(0)}.adm-overlay{z-index:35;background:#0f172a66;display:block;position:fixed;inset:0}.adm-main{margin-left:0}.adm-menu-toggle{display:inline-flex}.adm-body{padding:16px}}.layout{grid-template-columns:240px 1fr;min-height:100vh;display:grid}.sidebar{border-right:1px solid var(--med-border-soft);flex-direction:column;gap:10px;padding:20px 16px;display:flex}.sidebar h1{color:var(--med-fg);margin:0 0 10px;font-size:24px}button{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:var(--med-surface);text-align:left;cursor:pointer;padding:8px 12px;font-family:inherit}.content{padding:24px}.card-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;display:grid}.card{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:var(--med-surface);box-shadow:var(--med-shadow-sm);padding:14px}.lessons{grid-template-columns:260px 1fr;gap:16px;margin-top:12px;display:grid}.chapter-list{flex-direction:column;gap:8px;display:flex}.chapter-content{flex-direction:column;gap:12px;display:flex}.player-card{margin-top:16px}.player-error{border-radius:var(--med-radius-sm);color:#b42318;background:#dc35451f;margin:0 0 12px;padding:10px 12px;font-size:.95rem}.lesson-video-wrap{position:relative}.lesson-video{border-radius:var(--med-radius-sm);background:#0a0f0e;width:100%;min-height:360px}.sidebar input{max-width:100%}input{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:var(--med-surface);width:100%;max-width:540px;color:var(--med-fg);margin-top:8px;padding:10px 12px;font-family:inherit}input:focus{border-color:var(--med-primary);outline:none;box-shadow:0 0 0 3px #3e69ae33}.page-loading{justify-content:center;align-items:center;min-height:40vh;display:flex}.subtitle{color:var(--med-muted);margin-top:0;line-height:1.55}.muted.small,.small{font-size:13px}.lead{color:var(--med-fg-soft);max-width:42rem;font-size:1.05rem;line-height:1.6}.btn-primary{border-radius:var(--med-radius-sm);background:linear-gradient(160deg, var(--med-primary) 0%, var(--med-accent) 100%);color:#fff;cursor:pointer;text-align:center;border:none;margin-top:12px;padding:11px 20px;font-family:inherit;font-weight:600;display:inline-block;box-shadow:0 4px 14px #3e69ae59}.btn-primary:hover{background:linear-gradient(160deg, var(--med-primary-hover) 0%, var(--med-accent) 100%);box-shadow:0 6px 20px #3e69ae66}.btn-primary:disabled{opacity:.65;cursor:not-allowed}.btn-primary.inline{margin-top:0;text-decoration:none}.btn-watch{border-radius:var(--med-radius-sm);background:linear-gradient(160deg, var(--med-primary) 0%, var(--med-accent) 100%);color:#fff;cursor:pointer;text-align:center;border:none;padding:11px 20px;font-family:inherit;font-weight:600;text-decoration:none;display:inline-block;box-shadow:0 4px 14px #3e69ae59}.btn-watch:hover{background:linear-gradient(160deg, var(--med-primary-hover) 0%, var(--med-accent) 100%);color:#fff;box-shadow:0 6px 20px #3e69ae66}.btn-watch.inline{margin-top:0}.btn-get-access{border-radius:var(--med-radius-sm);color:#475569;cursor:pointer;text-align:center;background:#f8fafc;border:1px solid #94a3b8;padding:10px 18px;font-family:inherit;font-weight:600;text-decoration:none;display:inline-block;box-shadow:0 1px 3px #0f172a0f}.btn-get-access:hover{color:#334155;background:#f1f5f9;border-color:#64748b;box-shadow:0 2px 8px #0f172a14}.btn-get-access.inline{margin-top:0}.btn-link{color:var(--med-primary);margin-top:8px;font-weight:500;text-decoration:none;display:inline-block}.btn-link:hover{color:var(--med-primary-hover)}.btn-ghost{text-align:center;color:var(--med-fg-soft);background:0 0;border-color:#0000}.btn-ghost:hover{background:var(--med-primary-weak);color:var(--med-primary-hover)}.form-error{color:#b91c1c;font-size:14px}.landing{background:linear-gradient(180deg, #dceefe 0%, var(--med-bg-warm) 45%, #fff 100%);flex-direction:column;min-height:100vh;display:flex}.landing-header{border-bottom:1px solid var(--med-border-soft);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffe0;justify-content:space-between;align-items:center;padding:16px 28px;display:flex}.landing-brand{align-items:center;gap:10px;font-weight:700;display:flex}.logo-mark-img{object-fit:contain;width:64px;height:64px;display:block}.logo-text{color:var(--med-fg);letter-spacing:-.02em;font-size:18px}.landing-nav .nav-muted{color:var(--med-muted);font-size:14px;font-weight:500;text-decoration:none}.landing-nav .nav-muted:hover{color:var(--med-primary-hover)}.landing-main{box-sizing:border-box;flex:1;width:100%;max-width:960px;margin:0 auto;padding:32px 20px 48px}.landing-hero h1{color:var(--med-fg);letter-spacing:-.03em;margin-bottom:12px;font-size:clamp(1.65rem,3vw,2.15rem);line-height:1.2}.landing-auth{max-width:420px;margin-top:28px}.tabs{border-bottom:1px solid var(--med-border-soft);gap:0;margin-bottom:16px;display:flex}.tab{cursor:pointer;color:var(--med-muted);text-align:center;background:0 0;border:none;border-bottom:2px solid #0000;flex:1;margin-bottom:-1px;padding:10px;font-family:inherit;font-weight:600}.tab.active{color:var(--med-primary-hover);border-bottom-color:var(--med-primary)}.auth-form label{color:var(--med-fg-soft);margin-top:12px;font-size:14px;font-weight:500;display:block}.auth-form input{max-width:none;margin-top:6px}.hint{color:var(--med-muted);margin-top:12px;font-size:13px}.landing-footer{border-top:1px solid var(--med-border-soft);color:var(--med-muted);background:var(--med-surface);justify-content:space-between;align-items:center;padding:14px 28px;font-size:13px;display:flex}.landing-footer a{color:var(--med-primary);font-weight:500;text-decoration:none}.landing-marketing .landing-main-wide{max-width:1100px;padding-left:24px;padding-right:24px}.landing-header-wide{z-index:20;flex-wrap:wrap;gap:12px;position:sticky;top:0}.landing-nav-links{flex-wrap:wrap;align-items:center;gap:4px 12px;display:flex}.nav-anchor{color:var(--med-muted);cursor:pointer;text-align:left;border-radius:var(--med-radius-sm);background:0 0;border:none;padding:8px 10px;font-family:inherit;font-size:14px;font-weight:500}.nav-anchor:hover{color:var(--med-primary-hover);background:var(--med-primary-weak)}.landing-header-actions{align-items:center;gap:12px;display:flex}.landing-burger{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:var(--med-surface);cursor:pointer;width:38px;height:38px;margin-left:auto;padding:8px;display:none}.landing-burger span{background:var(--med-fg);border-radius:999px;width:100%;height:2px;display:block}.landing-burger span+span{margin-top:6px}.landing-drawer-overlay,.landing-drawer-head,.landing-drawer-close,.landing-drawer-actions{display:none}.landing-register-btn{margin-top:0;padding:9px 16px}.landing-hero-center{text-align:center;padding:24px 0 40px}.landing-kicker{text-transform:uppercase;letter-spacing:.14em;color:var(--med-primary);margin:0 0 12px;font-size:11px;font-weight:700}.landing-lead-wide{max-width:40rem;margin-left:auto;margin-right:auto}.landing-hero-cta{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:24px;display:flex}.landing-hero-cta .btn-primary{margin-top:0}.landing-hero-cta-center{flex-direction:column;align-items:center}.landing-hero-try-btn{text-align:center;min-width:220px}.btn-secondary{border-radius:var(--med-radius-sm);border:1px solid var(--med-border);background:var(--med-surface);color:var(--med-fg);cursor:pointer;padding:11px 20px;font-family:inherit;font-weight:600;display:inline-block}.btn-secondary:hover{background:var(--med-primary-weak);border-color:var(--med-primary);color:var(--med-primary-hover)}.landing-section-alt{border-radius:var(--med-radius);border:1px solid var(--med-border-soft);background:linear-gradient(#ffffffb8 0%,#ecfdf580 100%);margin-left:-24px;margin-right:-24px;padding-left:24px;padding-right:24px}.landing-section-title{text-align:center;color:var(--med-fg);letter-spacing:-.02em;margin:0 0 10px;font-size:clamp(1.35rem,2.5vw,1.75rem);font-weight:700}.landing-section-intro{text-align:center;color:var(--med-muted);max-width:42rem;margin:0 auto 28px;line-height:1.6}.landing-seed-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;display:grid}.landing-seed-card h3{margin:8px 0 12px;font-size:1.1rem}.landing-seed-tag{color:var(--med-primary-hover);background:var(--med-primary-weak);border-radius:var(--med-radius-pill);border:1px solid var(--med-primary-border);padding:5px 12px;font-size:12px;font-weight:600;display:inline-block}.landing-seed-list{color:var(--med-fg-soft);margin:0 0 12px;padding-left:1.1rem;font-size:14px;line-height:1.55}.landing-seed-note{color:var(--med-muted);margin:0;font-size:13px}.landing-advantages-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;display:grid}.landing-adv-card h3{margin:8px 0;font-size:1rem}.landing-adv-icon{background:linear-gradient(145deg, var(--med-surface), var(--med-primary-weak));border-radius:var(--med-radius-sm);border:1px solid var(--med-border);width:52px;height:52px;box-shadow:var(--med-shadow-sm);justify-content:center;align-items:center;margin-bottom:4px;font-size:1.4rem;line-height:1;display:flex}.landing-about{max-width:820px;margin:0 auto;padding:22px 24px}.landing-about p{color:var(--med-fg-soft);margin:0 0 14px;line-height:1.65}.landing-about p:last-child{margin-bottom:0}.landing-reviews-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;display:grid}.landing-review{margin:0}.landing-review-text{color:var(--med-fg-soft);margin:0 0 14px;font-style:italic;line-height:1.55}.landing-join{padding-bottom:56px}.plan-grid{grid-template-columns:1fr;gap:10px;margin-bottom:14px;display:grid}.plan-card{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);text-align:left;background:var(--med-surface);flex-direction:column;gap:8px;padding:12px;display:flex}.plan-card strong{color:var(--med-fg);font-size:1.05rem}.plan-card ul{color:var(--med-fg-soft);margin:0;padding-left:18px;font-size:13px}.plan-price{color:var(--med-primary-hover);font-weight:600}.plan-card.active{border-color:var(--med-primary);background:var(--med-primary-weak);box-shadow:0 12px 28px #3e69ae26}.register-form-actions{flex-wrap:wrap;gap:8px;margin-top:10px;display:flex}.register-form-actions .btn-primary,.register-form-actions .btn-secondary{margin-top:0}.payment-stub-page{background:linear-gradient(180deg, #dceefe 0%, var(--med-bg-warm) 45%, #fff 100%);flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.payment-stub-card{border-radius:var(--med-radius);border:1px solid var(--med-border-soft);width:min(560px,100%);padding:24px;box-shadow:0 24px 60px #3e69ae29}.payment-stub-card h1{margin:0 0 12px}.payment-stub-actions{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.register-page .register-card,.payment-page .payment-card{width:min(680px,100%)}.flow-steps{flex-wrap:wrap;gap:8px;margin:4px 0 10px;display:flex}.flow-step{color:var(--med-muted);border:1px solid var(--med-border);background:#fff;border-radius:999px;padding:5px 10px;font-size:12px;font-weight:600}.flow-step.active{color:var(--med-primary-hover);background:var(--med-primary-weak);border-color:var(--med-primary-border)}.plan-badge{letter-spacing:.04em;text-transform:uppercase;width:fit-content;color:var(--med-primary-hover);background:var(--med-primary-weak);border:1px solid var(--med-border);border-radius:999px;padding:4px 8px;font-size:11px;font-weight:700}.plan-card{transition:border-color .15s,box-shadow .15s,transform .15s;position:relative}.plan-card:hover{border-color:var(--med-primary-border);transform:translateY(-2px)}.payment-methods{gap:8px;margin-top:14px;display:grid}.payment-method{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);color:var(--med-fg-soft);background:#fff;align-items:center;gap:10px;padding:10px 12px;font-size:14px;display:flex}.payment-method.active{border-color:var(--med-primary-border);background:var(--med-primary-weak);color:var(--med-primary-hover)}.flow-hero{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:linear-gradient(140deg,#fff 0%,#dceefe 55%,#fff 100%);margin-bottom:14px;padding:14px 14px 12px}.flow-hero h1{margin:0 0 6px}.flow-hero .muted{margin:0}.plan-recommended{background:linear-gradient(135deg, var(--med-primary) 0%, var(--med-accent) 100%);color:#fff;letter-spacing:.04em;text-transform:uppercase;border-radius:999px;padding:4px 8px;font-size:11px;font-weight:700;position:absolute;top:-10px;right:10px;box-shadow:0 8px 18px #3e69ae59}.plan-icon{font-size:1rem}.payment-method-icon{border:1px solid var(--med-border);background:#fff;border-radius:999px;flex:0 0 28px;justify-content:center;align-items:center;width:28px;height:28px;font-size:14px;display:inline-flex}.payment-method.active .payment-method-icon{background:var(--med-primary-weak);border-color:var(--med-primary-border)}.step-anim{animation:.22s stepFadeSlide}@keyframes stepFadeSlide{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.landing-footer-pro{background:linear-gradient(180deg, var(--med-footer-elevated) 0%, var(--med-footer) 100%);color:var(--med-on-footer);border-top:1px solid #73b2de40;margin-top:auto;padding:44px 24px 36px}.landing-footer-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:28px 32px;max-width:1100px;margin:0 auto;display:grid}.landing-brand-footer .logo-mark{background:linear-gradient(145deg, var(--med-primary-mid) 0%, var(--med-primary) 100%);color:var(--med-footer);box-shadow:none}.landing-brand-footer .logo-text{color:var(--med-on-footer)}.landing-footer-copy{margin:10px 0 0}.landing-footer-heading{text-transform:uppercase;letter-spacing:.08em;color:var(--med-on-footer-muted);margin:0 0 12px;font-size:13px;font-weight:600}.landing-footer-contacts,.landing-footer-links{margin:0;padding:0;font-size:14px;line-height:1.7;list-style:none}.landing-footer-contacts a,.landing-footer-links a{color:var(--med-on-footer-link);font-weight:500;text-decoration:none}.landing-footer-contacts a:hover,.landing-footer-links a:hover{color:#fff;text-decoration:underline}@media (width<=720px){.landing-nav-links{order:3;justify-content:center;width:100%}.landing-header-wide{justify-content:center}}.student-shell .sidebar{gap:0}.sidebar-brand{margin-bottom:16px}.sidebar-user{color:var(--med-muted);margin:0;font-size:13px}.sidebar-nav{flex-direction:column;flex:1;gap:6px;display:flex}.nav-link{border-radius:var(--med-radius-sm);color:var(--med-fg);font:inherit;text-align:left;cursor:pointer;background:0 0;border:1px solid #0000;padding:10px 12px;text-decoration:none;display:block;position:relative}.nav-link:hover{background:var(--med-primary-weak);color:var(--med-primary-hover)}.nav-link.active{background:var(--med-nav-active-start);border-color:var(--med-primary-border);color:var(--med-primary-hover);font-weight:600}.sidebar-footer{border-top:1px solid var(--med-border-soft);margin-top:20px;padding-top:16px}.lessons-flow .breadcrumb{color:var(--med-muted);margin-bottom:8px;font-size:14px}.breadcrumb a{color:var(--med-primary);font-weight:500;text-decoration:none}.breadcrumb a:hover{color:var(--med-primary-hover);text-decoration:underline}.bc-sep{color:var(--med-muted-light);margin:0 6px}.subject-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;margin-top:16px;display:grid}.subject-card{color:inherit;text-decoration:none;transition:transform .12s,box-shadow .12s}.subject-card:hover{transform:translateY(-2px);box-shadow:0 12px 32px #3e69ae1f}.chapter-link-list{flex-direction:column;gap:10px;margin:16px 0 0;padding:0;list-style:none;display:flex}.chapter-row{color:inherit;justify-content:space-between;align-items:center;text-decoration:none;display:flex}.chapter-title{font-weight:600}.back-row{margin-top:24px}.back-row a{color:var(--med-primary);font-weight:500;text-decoration:none}.back-row a:hover{color:var(--med-primary-hover);text-decoration:underline}.video-rows{flex-direction:column;gap:10px;margin:16px 0 0;padding:0;list-style:none;display:flex}.video-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.video-meta{min-width:0}.video-row-youtube{align-items:stretch;transition:transform .2s,box-shadow .2s}.video-row-youtube:not(.video-row-locked):hover{transform:translateY(-2px);box-shadow:0 10px 24px #3e69ae2e}.video-row-link{min-width:0;color:inherit;flex:1;grid-template-columns:minmax(170px,260px) minmax(0,1fr);gap:12px;text-decoration:none;display:grid}.video-thumb{border:1px solid var(--med-border-soft);background:linear-gradient(140deg,#2f548f 0%,#3e69ae 55%,#73b2de 100%);border-radius:12px;justify-content:center;align-items:center;min-height:106px;display:flex;position:relative;overflow:hidden}.video-thumb-img{object-fit:cover;width:100%;height:100%;position:absolute;inset:0}.video-thumb:after{content:"";background:linear-gradient(#00000014 30%,#00000059 100%);position:absolute;inset:0}.video-thumb-play{z-index:2;color:#fff;opacity:.9;font-size:22px;transition:transform .2s,opacity .2s;position:relative}.video-thumb-duration{z-index:2;color:#fff;background:#111827d9;border-radius:7px;padding:3px 6px;font-size:12px;position:absolute;bottom:8px;right:8px}.video-row-link:hover .video-thumb-play{opacity:1;transform:scale(1.08)}.video-row-actions{flex-direction:column;gap:8px;min-width:180px;display:flex}.video-row-actions .btn-primary,.video-row-actions .btn-secondary,.video-row-actions .btn-watch,.video-row-actions .btn-get-access{text-align:center;width:100%}.watch-layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:14px;display:grid}.watch-sidebar{padding:12px}.watch-sidebar h3{margin:0 0 10px}.watch-list{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.watch-item{color:inherit;border:1px solid var(--med-border-soft);background:#fff;border-radius:10px;align-items:center;gap:10px;padding:8px;text-decoration:none;transition:transform .18s,box-shadow .18s,border-color .18s;display:flex}.watch-item-thumb{color:#fff;background:linear-gradient(140deg,#2f548f 0%,#3e69ae 55%,#73b2de 100%);border-radius:9px;justify-content:center;align-items:center;width:42px;height:42px;display:inline-flex;position:relative;overflow:hidden}.watch-item-thumb-img{object-fit:cover;width:100%;height:100%;position:absolute;inset:0}.watch-item-thumb:after{content:"";background:linear-gradient(#0000000d 30%,#00000061 100%);position:absolute;inset:0}.watch-item-thumb-play{z-index:2;font-size:14px;position:relative}.watch-item-meta{flex-direction:column;min-width:0;display:flex}.watch-item-meta strong{font-size:14px;line-height:1.3}.watch-item-meta span{color:var(--med-muted);font-size:12px}.watch-item.active{border-color:var(--med-primary-border);background:var(--med-primary-weak)}.watch-item-locked{opacity:.95;background:#f8fafc;border-style:solid;border-color:#e2e8f0}.watch-item-locked .watch-item-meta strong{color:#64748b}.watch-item-locked .watch-item-meta span{color:#64748b;font-weight:500}.watch-item-locked:hover{border-color:#94a3b8;transform:none;box-shadow:0 2px 8px #0f172a0f}.watch-item-thumb-locked .watch-item-thumb-img{filter:grayscale(.85)brightness(.7);opacity:.6}.watch-item-thumb-locked:after{background:#0f172a8c}.watch-item:not(.watch-item-locked):hover{border-color:var(--med-primary-border);transform:translateY(-1px);box-shadow:0 8px 18px #3e69ae29}.video-statuses{flex-wrap:wrap;gap:6px;margin-top:6px;display:flex}.status-badge{border:1px solid var(--med-border);color:var(--med-fg-soft);background:#fff;border-radius:999px;align-items:center;padding:3px 8px;font-size:12px;font-weight:600;display:inline-flex}.status-done{border-color:var(--med-primary-border);background:var(--med-primary-weak);color:var(--med-primary-hover)}.status-stopped{color:#374151;background:#f3f4f6;border-color:#9ca3af}.status-next{color:#1d4ed8;background:#eff6ff;border-color:#93c5fd}.status-trial{color:#475569;background:#f8fafc;border-color:#cbd5e1}.status-locked{color:#64748b;background:#f1f5f9;border-color:#cbd5e1}.video-row-locked{box-shadow:none;background:#f8fafc;border:1px solid #e2e8f0}.video-row-locked:hover{border-color:#cbd5e1;box-shadow:0 2px 8px #0f172a0d}.video-row-link-locked{cursor:pointer}.video-row-link-locked .video-meta strong{color:#64748b}.video-row-locked-hint{color:#64748b;margin:6px 0 0;font-size:12px;line-height:1.4}.video-thumb-locked{background:#e2e8f0}.video-thumb-locked .video-thumb-img{filter:grayscale(.9)brightness(.65);opacity:.55}.video-thumb-locked:after{background:#0f172a9e}.video-thumb-lock{z-index:3;color:#64748b;background:#f8fafceb;border:1px solid #cbd5e1;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;display:flex;position:relative;box-shadow:0 1px 4px #0f172a1f}.watch-item-thumb-locked .watch-item-thumb-play{color:#94a3b8;justify-content:center;align-items:center;font-size:14px;display:flex}.paywall-card{background:#f8fafc;border:1px solid #e2e8f0;max-width:560px;padding:24px}.paywall-actions{flex-wrap:wrap;gap:12px;margin-top:20px;display:flex}.home-trial-banner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px;padding:20px;display:flex}.home-trial-banner h2{margin:0 0 4px;font-size:1.15rem}.profile-upgrade{border-top:1px solid var(--med-border);flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;padding-top:16px;display:flex}.profile-dl{grid-template-columns:120px 1fr;gap:8px 16px;margin:0;display:grid}.profile-dl dt{color:var(--med-muted);margin:0;font-weight:500}.profile-dl dd{margin:0}.admin-login-page{background:linear-gradient(165deg, var(--med-footer) 0%, var(--med-primary-hover) 50%, var(--med-footer-elevated) 100%);min-height:100vh;color:var(--med-on-footer)}.admin-login-header{padding:20px 24px}.admin-login-header h1{color:var(--med-on-footer);letter-spacing:-.02em;margin:12px 0 0;font-size:1.5rem;font-weight:700}.logo-link{color:var(--med-on-footer-link);font-size:14px;font-weight:500;text-decoration:none}.logo-link:hover{color:#fff}.admin-login-card{max-width:420px;margin:24px auto;padding:24px}.admin-login-card .subtitle{color:var(--med-muted)}.admin-login-card .auth-form label{color:var(--med-fg-soft)}.admin-app{background:var(--med-bg);min-height:100vh}.admin-tabs{background:var(--med-surface);border-bottom:1px solid var(--med-border-soft);flex-wrap:wrap;gap:6px;padding:12px 24px 0;display:flex}.admin-tab{border-radius:var(--med-radius-sm) var(--med-radius-sm) 0 0;cursor:pointer;color:var(--med-muted);background:0 0;border:1px solid #0000;margin-bottom:-1px;padding:10px 18px;font-family:inherit;font-size:14px;font-weight:600}.admin-tab:hover{color:var(--med-primary-hover);background:var(--med-primary-weak)}.admin-tab.active{background:var(--med-bg);border-color:var(--med-border);border-bottom-color:var(--med-bg);color:var(--med-primary-hover)}.admin-tab-panel{max-width:900px;padding:16px 24px 40px}.admin-panel-card{max-width:720px}.admin-panel-wide{max-width:1100px}.admin-field-label{color:var(--med-fg-soft);margin-bottom:16px;font-size:14px;font-weight:500;display:block}.admin-select{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:var(--med-surface);width:100%;max-width:420px;margin-top:6px;padding:10px 12px;font-family:inherit;display:block}.admin-table-wrap{margin-top:12px;overflow-x:auto}.admin-table{border-collapse:collapse;width:100%;font-size:14px}.admin-table th,.admin-table td{text-align:left;border-bottom:1px solid var(--med-border-soft);padding:10px 12px}.admin-table th{color:var(--med-muted);background:var(--med-bg-warm);font-weight:600}.admin-textarea{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);resize:vertical;width:100%;max-width:none;min-height:120px;margin-top:6px;padding:10px 12px;font-family:inherit}.admin-checkbox-row{align-items:center;gap:10px;margin-top:12px;font-weight:500;display:flex}.admin-news-form{border-bottom:1px solid var(--med-border-soft);margin-bottom:28px;padding-bottom:24px}.admin-news-form-title{margin:0 0 12px;font-size:1.05rem}.admin-news-actions{flex-wrap:wrap;gap:12px;margin-top:8px;display:flex}.admin-news-list{flex-direction:column;gap:12px;margin:0;padding:0;list-style:none;display:flex}.admin-news-row{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:12px;padding:14px 16px;display:flex}.admin-news-row-main{flex:1;min-width:200px}.admin-news-row-actions{flex-wrap:wrap;gap:8px;display:flex}.admin-topbar{background:var(--med-surface);border-bottom:1px solid var(--med-border-soft);box-shadow:var(--med-shadow-sm);justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.admin-topbar h1{color:var(--med-fg);letter-spacing:-.02em;margin:0;font-size:1.25rem;font-weight:700}.admin-topbar-actions{gap:10px;display:flex}.admin-banner{border-radius:var(--med-radius-sm);color:#92400e;background:#fffbeb;border:1px solid #fde68a;margin:12px 24px 0;padding:12px 16px;font-size:14px}.admin-notice{border-radius:var(--med-radius-sm);color:#065f46;background:#ecfdf5;border:1px solid #a7f3d0;margin:12px 24px 0;padding:12px 16px;font-size:14px}.admin-content-page{padding-bottom:32px}.admin-guide{margin:16px 24px;padding:16px 20px}.admin-guide h2{margin:0 0 12px;font-size:1.05rem}.admin-guide-steps{color:var(--med-text-muted);flex-direction:column;gap:8px;margin:0;padding-left:1.25rem;display:flex}.admin-guide-steps li.active{color:var(--med-text);font-weight:500}.admin-guide-steps li.done{color:#059669}.admin-breadcrumb{border-top:1px solid var(--med-border);color:var(--med-primary);margin:14px 0 0;padding-top:12px;font-size:14px}.admin-content-grid{padding-top:0}.admin-column-head{align-items:flex-start;gap:12px;margin-bottom:16px;display:flex}.admin-column-head h2{margin:0 0 4px}.admin-step-badge{background:var(--med-primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:14px;font-weight:700;display:inline-flex}.admin-column-disabled{opacity:.72}.admin-add-form{border-bottom:1px solid var(--med-border);flex-direction:column;gap:10px;margin-bottom:16px;padding-bottom:16px;display:flex}.admin-add-form label{color:var(--med-text-muted);flex-direction:column;gap:6px;font-size:13px;font-weight:500;display:flex}.admin-add-form input{margin-top:0;font-weight:400}.admin-add-form-lesson{grid-template-columns:1fr 100px auto;align-items:end;gap:10px;display:grid}@media (width<=720px){.admin-add-form-lesson{grid-template-columns:1fr}}.admin-empty{border-radius:var(--med-radius-sm);color:var(--med-text-muted);text-align:center;background:#f8fafc;margin:0;padding:12px;font-size:14px}.admin-workspace{grid-template-columns:minmax(200px,1fr) minmax(200px,1fr) minmax(280px,1.4fr);align-items:start;gap:16px;padding:16px 24px 32px;display:grid}@media (width<=1024px){.admin-workspace{grid-template-columns:1fr}}.admin-column h2{margin:0 0 12px;font-size:1rem}.admin-inline-form{flex-wrap:nowrap;gap:8px;margin-bottom:12px;display:flex}.admin-inline-form input{flex:1;min-width:0;margin-top:0}.admin-inline-form-wrap{flex-wrap:wrap}.admin-select-list{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.admin-select-list li{align-items:center;gap:6px;display:flex}.pick-row{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:var(--med-surface);cursor:pointer;text-align:left;font:inherit;flex-direction:column;flex:1;gap:2px;padding:8px 10px;display:flex}.pick-row-title{font-weight:500}.pick-row.active{border-color:var(--med-primary);background:var(--med-primary-weak)}.reorder{flex-direction:column;gap:2px;display:flex}.reorder button{text-align:center;min-width:28px;padding:2px 6px}.admin-video-list{flex-direction:column;gap:10px;margin:12px 0 0;padding:0;list-style:none;display:flex}.admin-video-item{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.admin-video-actions{align-items:center;gap:8px;display:flex}.upload-label{color:var(--med-primary);cursor:pointer;font-size:13px;font-weight:500;text-decoration:underline}.upload-label:hover{color:var(--med-primary-hover)}.upload-label-done{color:#047857;text-decoration:none}.upload-label-done:hover{color:#065f46}.support-chat-card{gap:12px;display:grid}.support-chat-list{gap:10px;max-height:420px;padding-right:4px;display:grid;overflow:auto}.admin-chat-list{margin:10px 0 4px}.admin-support-layout{grid-template-columns:minmax(0,1.6fr) minmax(280px,.8fr);align-items:start;gap:14px;display:grid}.admin-support-main{gap:10px;display:grid}.admin-support-users{padding:12px}.admin-support-users h3{margin:0 0 10px;font-size:1rem}.admin-support-users-list{gap:8px;max-height:520px;padding-right:2px;display:grid;overflow:auto}.admin-support-users-list .pick-row{gap:4px;display:grid}.admin-support-user-title{font-weight:600}@media (width<=980px){.admin-support-layout{grid-template-columns:1fr}}@media (width<=1100px){.admin-tab-panel{max-width:none;padding:14px 16px 28px}.admin-panel-card,.admin-panel-wide{max-width:none}.admin-topbar,.admin-tabs{padding-left:16px;padding-right:16px}.admin-banner{margin-left:16px;margin-right:16px}}@media (width<=860px){.admin-topbar{flex-wrap:wrap;align-items:flex-start;gap:10px}.admin-topbar-actions{flex-wrap:wrap;width:100%}.admin-tabs{flex-wrap:nowrap;gap:8px;padding-bottom:8px;overflow-x:auto}.admin-tab{white-space:nowrap;border-radius:var(--med-radius-sm);flex:none;margin-bottom:0}.admin-tab.active{border-bottom-color:var(--med-border)}.admin-inline-form{flex-wrap:wrap}.admin-inline-form input,.admin-inline-form button{width:100%}.admin-video-item{flex-direction:column}.admin-video-actions{justify-content:space-between;width:100%}.admin-news-row{padding:12px}}@media (width<=640px){.admin-login-header,.admin-topbar,.admin-tabs,.admin-tab-panel,.admin-workspace{padding-left:12px;padding-right:12px}.admin-tab-panel{padding-top:12px;padding-bottom:20px}.admin-banner{margin-left:12px;margin-right:12px;font-size:13px}.admin-login-card{margin:16px 12px;padding:16px}.admin-topbar h1{font-size:1.1rem}.admin-table{font-size:13px}.admin-table th,.admin-table td{padding:8px 9px}.admin-support-users{padding:10px}.support-chat-list{max-height:360px}}@media (width<=1024px){.layout{grid-template-columns:220px 1fr}.content,.student-main{padding:18px}.lessons{grid-template-columns:1fr}.landing-main{padding:24px 16px 36px}.landing-marketing .landing-main-wide{padding-left:16px;padding-right:16px}.landing-section-alt{margin-left:-12px;margin-right:-12px;padding-left:12px;padding-right:12px}}@media (width<=820px){.layout,.student-app .layout{grid-template-columns:1fr}.sidebar,.student-app .student-sidebar{border-right:none;border-bottom:1px solid var(--med-border-soft);box-shadow:none}.sidebar-nav{flex-flow:column;gap:8px;width:100%}.nav-link{justify-content:space-between;align-items:center;width:100%;display:flex}.student-main{width:100%;max-width:100%;margin:0;padding:16px 12px 28px}.landing-header{padding:12px 14px}.landing-header-wide{z-index:40;border-bottom:1px solid var(--med-border-soft);background:#fffffff5;position:sticky;top:0}.landing-brand{justify-content:space-between;width:100%}.landing-burger{display:inline-block}.landing-drawer-overlay{opacity:0;pointer-events:none;z-index:45;background:#12233d57;border:none;transition:opacity .2s;position:fixed;inset:0}.landing-nav-links{border-left:1px solid var(--med-border-soft);z-index:50;background:linear-gradient(#fff 0%,#f7fbff 100%);flex-flow:column;gap:10px;width:min(320px,84vw);height:100vh;padding:14px;transition:transform .22s;display:flex;position:fixed;top:0;right:0;overflow-y:auto;transform:translate(100%);box-shadow:-10px 0 28px #3e69ae26}.landing-drawer-head{border-bottom:1px solid var(--med-border-soft);justify-content:flex-start;align-items:center;gap:10px;margin:0 0 2px;padding:0 0 8px;display:flex}.landing-drawer-head strong{letter-spacing:-.01em;font-size:1rem}.landing-drawer-close{border:1px solid var(--med-border);width:32px;height:32px;color:var(--med-fg);cursor:pointer;background:#fff;border-radius:999px;justify-content:center;align-items:center;font-size:20px;line-height:1;display:inline-flex}.nav-anchor{white-space:nowrap;border:1px solid var(--med-border);border-radius:var(--med-radius-sm);width:100%;color:var(--med-fg);box-shadow:var(--med-shadow-sm);background:#fff;flex:none;padding:11px 12px;font-weight:600}.nav-anchor:hover{background:var(--med-primary-weak);border-color:var(--med-primary-border);color:var(--med-primary-hover)}.landing-header-mobile-open .landing-nav-links{transform:translate(0)}.landing-header-mobile-open .landing-drawer-overlay{opacity:1;pointer-events:auto;display:block}.landing-drawer-actions{border-top:1px solid var(--med-border-soft);flex-direction:column;gap:10px;margin-top:10px;padding-top:10px;display:flex}.landing-header-mobile-open .landing-register-btn,.landing-header-mobile-open .nav-muted{text-align:center;width:100%}.landing-header-mobile-open .nav-muted{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);color:var(--med-fg-soft);background:#fff;padding:10px 12px;font-weight:600;text-decoration:none}.landing-header-actions{display:none}.landing-hero-cta{justify-content:flex-start}.landing-hero-cta .btn-primary,.landing-hero-cta .btn-secondary{text-align:center;width:100%}.lessons-flow{width:100%}.student-page-head{margin-bottom:18px}.student-page-intro{max-width:none}.home-study-row .btn-study{width:100%}.breadcrumb{flex-wrap:wrap;row-gap:4px;display:flex}.chapter-row{align-items:flex-start;gap:6px}.video-row{flex-direction:column;align-items:flex-start}.video-row-link{grid-template-columns:1fr;width:100%}.video-thumb{min-height:170px}.video-row .btn-primary,.video-row .btn-watch,.video-row .btn-get-access{width:100%;margin-top:4px}.watch-layout,.card-grid,.subject-grid,.landing-seed-grid,.landing-advantages-grid,.landing-reviews-grid{grid-template-columns:1fr}}@media (width<=560px){.content{padding:12px}.student-main{width:100%;max-width:100%;margin:0;padding-left:10px;padding-right:10px}.landing-main{padding:18px 12px 28px}.landing-footer-pro{padding:28px 12px 22px}.landing-footer{flex-direction:column;align-items:flex-start;gap:8px;padding:12px}.profile-dl{grid-template-columns:1fr;gap:4px}.profile-dl dt{margin-top:8px}.player-card{padding:12px}.lesson-video{min-height:220px}.lessons-flow-padded{width:100%;max-width:100%;margin-left:0;margin-right:0;padding-left:0;padding-right:0}.student-page-kicker{letter-spacing:.08em}.student-page-head h1{font-size:clamp(1.25rem,5vw,1.5rem)}.card,.subject-card.card,.chapter-row.card,.video-row.card{padding:12px}.back-row{margin-top:16px}}.support-msg{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:var(--med-surface);padding:10px 12px}.support-msg-admin{background:#fff}.support-msg-mine{background:var(--med-primary-weak);border-color:var(--med-primary-border)}.support-msg-meta{color:var(--med-muted);justify-content:space-between;gap:10px;margin-bottom:6px;font-size:12px;display:flex}.support-msg p{white-space:pre-wrap;margin:0}.support-chat-form{gap:10px;display:grid}.lesson-comment-form{border-bottom:1px solid var(--med-border-soft);margin-bottom:10px;padding-bottom:12px}.lesson-comment-input-row{align-items:flex-start;gap:10px;display:flex}.lesson-comment-actions{justify-content:flex-end;margin-top:8px;display:flex}.lesson-comments-list{flex-direction:column;gap:12px;max-height:520px;padding-right:4px;display:flex;overflow-y:auto}.lesson-comment-item{gap:10px;display:flex}.lesson-comment-avatar{color:#fff;background:var(--med-primary);border-radius:999px;flex:0 0 34px;justify-content:center;align-items:center;width:34px;height:34px;font-size:13px;font-weight:700;display:inline-flex}.lesson-comment-avatar.admin{background:#1f2937}.lesson-comment-body{min-width:0}.lesson-comment-meta{color:var(--med-muted);flex-wrap:wrap;align-items:center;gap:6px;font-size:12px;display:flex}.lesson-comment-meta strong{color:var(--med-fg);font-size:13px}.lesson-comment-badge{border:1px solid var(--med-border);color:var(--med-fg-soft);background:var(--med-primary-weak);border-radius:999px;padding:1px 7px;font-size:11px}.lesson-comment-body p{white-space:pre-wrap;margin:4px 0 0}.nav-badge{background:var(--med-primary);color:#fff;border-radius:999px;justify-content:center;align-items:center;min-width:20px;height:20px;margin-left:8px;padding:0 6px;font-size:11px;font-weight:700;line-height:1;display:inline-flex}.nav-badge-inline{margin-left:6px}.student-app{background:linear-gradient(155deg, #dceefe 0%, var(--med-bg-warm) 38%, #fff 100%);min-height:100vh}.student-app .layout{grid-template-columns:268px 1fr;min-height:100vh}.student-app .student-sidebar{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-right:1px solid var(--med-border-soft);background:#ffffffe6;box-shadow:4px 0 28px #3e69ae1f}.student-sidebar-brand-row{align-items:flex-start;gap:12px;display:flex}.student-drawer-overlay,.student-burger,.student-drawer-close{display:none}.student-app .sidebar-brand{margin-bottom:8px}.logo-text-sidebar{color:var(--med-fg);letter-spacing:-.02em;font-size:17px;font-weight:700;line-height:1.25}.sidebar-site-link{color:var(--med-primary);margin-top:10px;font-size:13px;font-weight:500;text-decoration:none;display:inline-block}.sidebar-site-link:hover{text-decoration:underline}.student-main{box-sizing:border-box;width:100%;max-width:1040px;margin:0 auto;padding:28px 28px 56px}.student-page-head{margin-bottom:28px}.student-page-kicker{letter-spacing:.1em;text-transform:uppercase;color:var(--med-primary);margin:0 0 8px;font-size:11px;font-weight:600}.student-page-head h1{color:var(--med-fg);letter-spacing:-.02em;margin:0 0 8px;font-size:clamp(1.45rem,2.4vw,1.85rem);font-weight:700;line-height:1.2}.student-page-intro{max-width:38rem;margin:0}.lessons-flow-padded{animation:.35s studentFadeIn}@keyframes studentFadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.student-app .subject-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}.student-app .subject-card.card{border:1px solid var(--med-border);border-radius:var(--med-radius);box-shadow:var(--med-shadow-sm);padding:18px 16px}.student-app .subject-card:hover{border-color:var(--med-primary-border);box-shadow:0 14px 36px #3e69ae24}.student-app .chapter-row.card{border-radius:var(--med-radius-sm);border:1px solid var(--med-border);box-shadow:var(--med-shadow-sm);padding:14px 16px;transition:border-color .15s,box-shadow .15s}.student-app .chapter-row.card:hover{border-color:var(--med-primary-border);box-shadow:0 10px 28px #3e69ae1f}.student-app .video-row.card{border-radius:var(--med-radius-sm);border:1px solid var(--med-border);box-shadow:var(--med-shadow-sm)}.student-app .card-grid .card{border-radius:var(--med-radius);border:1px solid var(--med-border);box-shadow:var(--med-shadow-sm)}.student-app .nav-link.active{background:linear-gradient(135deg, var(--med-nav-active-start) 0%, var(--med-nav-active-end) 100%);border-color:var(--med-primary-border);color:var(--med-primary-hover)}.home-study-row{margin-top:20px}.btn-study{border-radius:var(--med-radius-sm);justify-content:center;align-items:center;margin-top:0;padding:14px 28px;font-size:1.05rem;text-decoration:none;display:inline-flex}.sr-only{clip:rect(0, 0, 0, 0);border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (width<=820px){.student-drawer-overlay{opacity:0;pointer-events:none;z-index:48;background:#12233d57;border:none;transition:opacity .2s;position:fixed;inset:0}.student-burger{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:var(--med-surface);color:var(--med-fg);font:inherit;cursor:pointer;justify-content:center;align-items:center;gap:8px;margin:0 0 12px;padding:10px 12px;font-weight:600;display:inline-flex}.student-app .student-sidebar{z-index:50;border-right:1px solid var(--med-border-soft);background:#fff;width:min(320px,84vw);height:100vh;padding-top:12px;transition:transform .22s;position:fixed;top:0;left:0;overflow-y:auto;transform:translate(-100%);box-shadow:6px 0 24px #3e69ae29}.student-app .student-sidebar .sidebar-brand,.student-app .student-sidebar .sidebar-footer{width:100%;max-width:280px;margin-left:auto;margin-right:auto;padding-left:4px;padding-right:4px}.student-app .student-sidebar .sidebar-nav{width:100%;max-width:280px;margin-left:auto;margin-right:auto}.student-app .student-sidebar .btn-ghost{width:100%}.student-app .student-sidebar.student-sidebar-open{transform:translate(0)}.student-app .student-sidebar.student-sidebar-open~.student-main .student-burger,.student-app .student-sidebar.student-sidebar-open~.content .student-burger{opacity:.4}.student-app.student-app-menu-open .student-drawer-overlay{opacity:1;pointer-events:auto}.student-drawer-close{border:1px solid var(--med-border);width:30px;height:30px;color:var(--med-fg);cursor:pointer;background:#fff;border-radius:999px;justify-content:center;align-items:center;margin-left:auto;font-size:20px;line-height:1;display:inline-flex}.student-app .layout{min-height:100vh;display:block}.student-main{box-sizing:border-box;width:100%;max-width:none;margin:0;padding:14px 12px 24px}.student-main .student-burger{margin-bottom:12px}.student-app .student-sidebar{padding:12px 12px 14px}.student-sidebar-brand-row{align-items:center;gap:10px}.student-app .student-sidebar .sidebar-brand,.student-app .student-sidebar .sidebar-nav,.student-app .student-sidebar .sidebar-footer{width:100%;max-width:none;margin:0;padding:0}.student-app .student-sidebar .sidebar-nav{gap:8px;margin-top:8px}.student-app .student-sidebar .nav-link{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);box-sizing:border-box;background:#fff;justify-content:space-between;width:100%;min-height:42px;padding:10px 12px}.student-app .student-sidebar .sidebar-footer{border-top:1px solid var(--med-border-soft);margin-top:14px;padding-top:12px}.student-app .student-sidebar .btn-ghost{border:1px solid var(--med-border);border-radius:var(--med-radius-sm);background:#fff;width:100%;min-height:42px}.lessons-flow-padded{width:100%;max-width:none;margin:0}.student-page-head{margin-bottom:16px}.student-page-intro{max-width:none}.card-grid{grid-template-columns:1fr;gap:12px}.video-row{flex-direction:column;align-items:flex-start;gap:10px}.video-row .btn-primary,.video-row .btn-watch,.video-row .btn-get-access{width:100%;margin-top:0}.video-thumb{min-height:156px}.video-row .btn-secondary{width:100%;margin-top:0}.video-row-actions{width:100%;min-width:0}.student-app .content.student-main{width:100%!important;max-width:100%!important;margin:0!important;padding:14px 12px 24px!important}.student-app .content.student-main>section{width:100%!important;max-width:100%!important;margin:0!important}.student-app .lessons-flow.lessons-flow-padded{width:100%!important;max-width:100%!important;margin:0!important;padding-left:0!important;padding-right:0!important}}:root{--med-text:#1e3a5f;--med-text-secondary:#5b7a9d;--med-text-muted:#6699cf;--med-success:#0d9488;--med-danger:#b42318;--med-space-1:4px;--med-space-2:8px;--med-space-3:12px;--med-space-4:16px;--med-space-5:20px;--med-space-6:24px;--med-space-8:32px;--med-space-10:40px}body{color:var(--med-text);line-height:1.55}.muted,.subtitle{color:var(--med-text-secondary)}h1,h2,h3,h4{color:var(--med-text)}input,textarea,select{color:var(--med-text);border-color:var(--med-border);transition:border-color .15s,box-shadow .15s}input:focus,textarea:focus,select:focus{border-color:var(--med-primary);outline:none;box-shadow:0 0 0 3px #3e69ae26}.student-page-head-row{justify-content:space-between;align-items:flex-start;gap:var(--med-space-4);flex-wrap:wrap;display:flex}.student-page-head-text{flex:1;min-width:200px}.student-page-actions{flex-shrink:0;padding-top:4px}.student-page-head h1{color:var(--med-text)}.bc-current{color:var(--med-text-secondary);font-weight:500}.student-app .nav-link{align-items:center;gap:10px;display:flex}.nav-icon{opacity:.85;flex-shrink:0;width:20px;height:20px}.nav-link-text{flex:1}.student-app .nav-link .nav-badge{margin-left:auto}.student-app .nav-link.active .nav-icon{opacity:1}.sidebar-brand-text{flex:1;min-width:0}.sidebar-progress{margin-top:var(--med-space-4);background:var(--med-primary-weak);border-radius:var(--med-radius-pill);height:6px;position:relative;overflow:hidden}.sidebar-progress-bar{background:linear-gradient(90deg, var(--med-primary), var(--med-accent));border-radius:inherit;height:100%;transition:width .4s}.sidebar-progress-label{color:var(--med-text-secondary);margin-top:6px;font-size:11px;font-weight:600;display:block}.btn-logout{text-align:center;justify-content:center;width:100%}.student-topbar{margin-bottom:var(--med-space-4);display:none}.student-burger{border-radius:var(--med-radius-sm);border:1px solid var(--med-border);background:var(--med-surface);color:var(--med-text);cursor:pointer;box-shadow:var(--med-shadow-sm);align-items:center;gap:8px;padding:10px 14px;font-size:14px;font-weight:600;display:inline-flex}.student-burger-icon{background:currentColor;border-radius:1px;width:16px;height:2px;box-shadow:0 -5px,0 5px}.home-continue{justify-content:space-between;align-items:center;gap:var(--med-space-5);padding:var(--med-space-6);margin-bottom:var(--med-space-6);border-color:var(--med-primary-border);background:linear-gradient(135deg,#fff 0%,#eef6ff 100%);flex-wrap:wrap;display:flex}.home-continue-label{letter-spacing:.08em;text-transform:uppercase;color:var(--med-primary);margin:0 0 6px;font-size:11px;font-weight:700}.home-continue h2{margin:0 0 6px;font-size:1.25rem;font-weight:700}.home-stats{gap:var(--med-space-4);margin-bottom:var(--med-space-6);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));display:grid}.home-stat{align-items:center;gap:var(--med-space-4);padding:var(--med-space-5);display:flex}.home-stat h3{margin:0 0 4px;font-size:1rem}.home-stat-icon{background:var(--med-primary-weak);border-radius:12px;flex-shrink:0;width:48px;height:48px;position:relative}.home-stat-icon-catalog:after{content:"";border:2px solid var(--med-primary);box-shadow:0 -6px 0 -2px var(--med-primary);border-radius:2px;position:absolute;inset:14px 12px}.home-stat-icon-support:after{content:"";border:2px solid var(--med-primary);border-radius:6px;position:absolute;inset:14px 12px}.home-progress-ring{--pct:0;background:conic-gradient(var(--med-primary) calc(var(--pct) * 1%), var(--med-primary-weak) 0);border-radius:50%;flex-shrink:0;place-items:center;width:52px;height:52px;display:grid;position:relative}.home-progress-ring:before{content:"";background:var(--med-surface);border-radius:50%;position:absolute;inset:6px}.home-progress-ring span{color:var(--med-primary);font-size:12px;font-weight:700;position:relative}.home-quick-card{gap:var(--med-space-2);padding:var(--med-space-5);flex-direction:column;display:flex}.home-quick-card h3{margin:0}.home-quick-card p{flex:1;margin:0}.student-app .subject-card{padding:var(--med-space-5);color:inherit;flex-direction:column;gap:6px;text-decoration:none;transition:transform .15s,box-shadow .15s,border-color .15s;display:flex;position:relative}.subject-card-num{letter-spacing:.06em;color:var(--med-primary);font-size:11px;font-weight:700}.subject-card h3{margin:0;font-size:1.1rem}.subject-card-arrow{color:var(--med-muted-light);font-size:1.25rem;transition:transform .15s,color .15s;position:absolute;top:50%;right:16px;transform:translateY(-50%)}.student-app .subject-card:hover .subject-card-arrow{color:var(--med-primary);transform:translateY(-50%)translate(3px)}.chapter-link-list{gap:var(--med-space-3);flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.student-app .chapter-row{align-items:center;gap:var(--med-space-4);padding:var(--med-space-4) var(--med-space-5);color:inherit;text-decoration:none;transition:transform .12s,box-shadow .12s;display:flex}.chapter-row-num{background:var(--med-primary-weak);width:32px;height:32px;color:var(--med-primary);border-radius:10px;flex-shrink:0;place-items:center;font-size:14px;font-weight:700;display:grid}.chapter-row-body{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.chapter-title{color:var(--med-text);font-weight:600}.chapter-row-arrow{color:var(--med-muted-light);flex-shrink:0;font-size:1.1rem}.student-app .chapter-row:hover .chapter-row-arrow{color:var(--med-primary)}.profile-card-v2{gap:var(--med-space-6);padding:var(--med-space-6);flex-wrap:wrap;align-items:flex-start;display:flex}.profile-avatar{background:linear-gradient(145deg, var(--med-primary), var(--med-accent));color:#fff;border-radius:18px;flex-shrink:0;place-items:center;width:72px;height:72px;font-size:28px;font-weight:700;display:grid}.profile-dl-v2{gap:var(--med-space-4);flex-direction:column;flex:1;min-width:220px;margin:0;display:flex}.profile-row{gap:var(--med-space-3);grid-template-columns:100px 1fr;align-items:baseline;display:grid}.profile-row dt{color:var(--med-text-secondary);margin:0;font-size:13px;font-weight:600}.profile-row dd{margin:0;font-weight:500}.profile-plan-badge{border-radius:var(--med-radius-pill);background:var(--med-primary-weak);color:var(--med-primary-hover);padding:4px 12px;font-size:13px;font-weight:600;display:inline-block}.loading-block{align-items:center;gap:var(--med-space-4);padding:var(--med-space-10) var(--med-space-4);flex-direction:column;display:flex}.loading-spinner{border:3px solid var(--med-primary-weak);border-top-color:var(--med-primary);border-radius:50%;width:36px;height:36px;animation:.7s linear infinite uiSpin}@keyframes uiSpin{to{transform:rotate(360deg)}}.empty-state{padding:var(--med-space-8);text-align:center}.empty-state p{margin:0 0 var(--med-space-2)}.student-app .card{border-radius:var(--med-radius);border-color:var(--med-border-soft)}.student-app .subject-card:hover,.student-app .chapter-row:hover{box-shadow:var(--med-shadow);border-color:var(--med-primary-border);transform:translateY(-2px)}.landing-auth-centered{max-width:420px;margin:0 auto}.auth-form label{color:var(--med-text-secondary);flex-direction:column;gap:6px;font-size:14px;font-weight:600;display:flex}@media (width<=860px){.student-topbar{display:block}.student-main{padding-top:12px}.home-continue{flex-direction:column;align-items:stretch}.home-continue .btn-primary{text-align:center;width:100%}.profile-row{grid-template-columns:1fr;gap:4px}}@media (width<=560px){.student-page-head-row{flex-direction:column}.student-page-actions{width:100%}.student-page-actions .btn-primary{text-align:center;width:100%}}.landing-marketing{background:linear-gradient(165deg, #dceefe 0%, var(--med-bg) 42%, #fff 100%)}.landing-header-wide{box-shadow:0 1px 0 var(--med-border-soft), 0 4px 24px #3e69ae0f}.landing-marketing .logo-text{color:var(--med-text);font-weight:700}.landing-nav-links .nav-anchor{color:var(--med-text-secondary);font-weight:600}.landing-hero-center{text-align:center;max-width:780px;margin:0 auto;padding:48px 0 56px}.landing-hero-center .landing-kicker{border-radius:var(--med-radius-pill);border:1px solid var(--med-border-soft);background:#ffffffd9;margin-bottom:16px;padding:6px 14px;display:inline-block}.landing-hero-center h1{color:var(--med-text);margin-bottom:16px;font-size:clamp(1.75rem,4vw,2.35rem);line-height:1.18}.landing-lead-wide{color:var(--med-text-secondary);margin-bottom:28px;font-size:1.05rem;line-height:1.65}.landing-hero-stats{flex-wrap:wrap;justify-content:center;gap:12px 20px;margin-bottom:28px;display:flex}.landing-hero-stat{border-radius:var(--med-radius-pill);border:1px solid var(--med-border-soft);color:var(--med-text-secondary);background:#ffffffe6;align-items:center;gap:8px;padding:8px 14px;font-size:13px;font-weight:600;display:inline-flex}.landing-hero-stat strong{color:var(--med-primary);font-weight:700}.landing-hero-cta{justify-content:center;gap:12px}.landing-section{padding:56px 0;scroll-margin-top:96px}.landing-section-alt{border-radius:var(--med-radius);background:linear-gradient(#dceefe73 0%,#fff0 100%);margin-left:-20px;margin-right:-20px;padding-left:20px;padding-right:20px}.landing-section-title{color:var(--med-text);text-align:center;margin-bottom:10px;font-size:clamp(1.35rem,2.5vw,1.65rem)}.landing-section-intro{text-align:center;max-width:640px;color:var(--med-text-secondary);margin:0 auto 32px;line-height:1.6}.landing-seed-grid{gap:20px}.landing-seed-card{border-radius:var(--med-radius);padding:22px 20px;transition:transform .15s,box-shadow .15s;position:relative}.landing-seed-card:hover{box-shadow:var(--med-shadow);transform:translateY(-3px)}.landing-seed-card h3{color:var(--med-text);margin:8px 0 12px;padding-right:56px;font-size:1.05rem}.landing-seed-tag{background:var(--med-primary-weak);color:var(--med-primary-hover);font-weight:700;position:absolute;top:16px;right:16px}.landing-seed-list li{color:var(--med-text-secondary)}.landing-advantages-grid{gap:18px}.landing-adv-card{border-radius:var(--med-radius);padding:22px 18px;transition:transform .12s,border-color .12s}.landing-adv-card:hover{border-color:var(--med-primary-border);transform:translateY(-2px)}.landing-adv-card h3{color:var(--med-text);margin:12px 0 8px;font-size:1rem}.landing-adv-icon{background:linear-gradient(145deg, var(--med-primary-weak), #fff);border:1px solid var(--med-border-soft);width:44px;height:44px;color:var(--med-primary);border-radius:12px;place-items:center;font-size:18px;font-weight:800;line-height:1;display:grid}.landing-about{border-radius:var(--med-radius);max-width:820px;margin:0 auto;padding:28px 26px}.landing-about p{color:var(--med-text-secondary);line-height:1.7}.landing-review{border-radius:var(--med-radius);padding:22px 20px;position:relative}.landing-review:before{content:"“";color:var(--med-primary-weak);font-size:48px;font-weight:700;line-height:1;position:absolute;top:8px;left:16px}.landing-review-text{color:var(--med-text);margin:0 0 16px;padding-top:8px;line-height:1.65;position:relative}.landing-review footer strong{color:var(--med-text)}.landing-cta-banner{border-radius:var(--med-radius);background:linear-gradient(135deg, var(--med-primary) 0%, #517fbe 100%);color:#fff;text-align:center;box-shadow:var(--med-shadow);margin:48px 0 24px;padding:36px 28px}.landing-cta-banner h2{color:#fff;margin:0 0 10px;font-size:clamp(1.25rem,2.5vw,1.5rem)}.landing-cta-banner p{opacity:.92;max-width:480px;margin:0 auto 20px}.landing-cta-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.landing-cta-banner .btn-primary{color:var(--med-primary-hover);background:#fff;border-color:#fff}.landing-cta-banner .btn-primary:hover{background:var(--med-primary-weak)}.landing-cta-banner .btn-secondary{color:#fff;background:0 0;border-color:#ffffffa6}.landing-cta-banner .btn-secondary:hover{background:#ffffff1f}.landing-register-btn{text-align:center;justify-content:center;min-width:100px}.landing-brand-row{flex:1;align-items:center;gap:12px;min-width:0;display:flex}.site-brand-link{color:inherit;align-items:center;gap:10px;font-weight:700;text-decoration:none;display:flex}.site-brand-link:hover .logo-text{color:var(--med-primary-hover)}.landing-seed-cta{margin-top:12px;font-weight:600;display:inline-block}.landing-footer-nav a{color:var(--med-on-footer-link);font-weight:500;text-decoration:none}.landing-footer-nav a:hover{color:#fff;text-decoration:underline}.landing-header-actions .nav-muted,a.nav-muted{color:var(--med-text-secondary);font-size:14px;font-weight:600;text-decoration:none}a.nav-muted:hover{color:var(--med-primary-hover)}.auth-page-links{flex-wrap:wrap;justify-content:center;gap:12px 16px;margin-top:16px;font-size:14px;display:flex}.auth-flow-header{justify-content:space-between;align-items:center;gap:16px;width:min(680px,100%);margin-bottom:16px;display:flex}.auth-flow-header-actions{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.support-back-links{flex-wrap:wrap;gap:8px 20px;display:flex}.support-back-links a+a:before{content:none}@media (width<=820px){.landing-brand-row{justify-content:space-between;width:100%}.landing-brand-row .landing-burger{display:inline-flex}.landing-hero-center{text-align:left;padding:32px 0 40px}.landing-hero-stats{justify-content:flex-start}.landing-hero-cta{flex-direction:column;align-items:stretch}.landing-hero-cta .btn-primary,.landing-hero-cta .btn-secondary{text-align:center;width:100%}.landing-section-alt{border-radius:0;margin-left:0;margin-right:0;padding-left:0;padding-right:0}}