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var(--tw-backdrop-sepia,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.outline-none{--tw-outline-style:none;outline-style:none}@media (hover:hover){.group-hover\:text-rose-400:is(:where(.group):hover *){color:var(--color-rose-400)}.group-hover\:text-slate-950:is(:where(.group):hover *){color:var(--color-slate-950)}}.file\:ml-3::file-selector-button{margin-left:calc(var(--spacing) * 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--tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@keyframes spin{to{transform:rotate(360deg)}}.student-app{--color-primary:#4338ca;--color-primary-bg:#eef2ff;--color-primary-border:#c7d2fe;--color-accent:#eab308;--color-accent-bg:#fef9c3;--color-accent-border:#fde047;--color-success:#16805d;--color-success-bg:#edf9f4;--color-success-border:#b9e5d2;--color-warning:#b66a16;--color-warning-bg:#fff8ea;--color-warning-border:#f2d399;--color-danger:#bd3d44;--color-danger-bg:#fff2f2;--color-danger-border:#efc0c3;--color-locked:#64748b;--color-locked-bg:#f1f5f9;--color-locked-border:#e2e8f0;--color-ink:#172b3a;--color-muted:#667985;--color-border:#dce4e8;--color-surface:#fff;--color-bg:#f3f6f7;--radius:12px;--shadow-sm:0 2px 10px #172b3a12;--shadow-md:0 14px 36px #172b3a1a;background:var(--color-bg);min-height:100vh;color:var(--color-ink);font-feature-settings:"kern";letter-spacing:0;font-family:Tajawal,Segoe UI,Tahoma,system-ui,sans-serif;line-height:1.7;display:flex}.student-app *{box-sizing:border-box}.student-app button,.student-app input{font:inherit}.student-app h1,.student-app h2,.student-app h3,.student-app strong{font-weight:700}.student-app button{font-weight:500}.app-content{flex-direction:column;flex:1;min-width:0;display:flex}.app-main{flex:1;width:min(1280px,100%);margin:0 auto;padding:20px 28px 40px}.app-sidebar{background:var(--color-surface);border-left:1px solid var(--color-border);box-shadow:var(--shadow-md);inset-inline-start:0;z-index:30;flex-direction:column;width:260px;height:100vh;transition:transform .22s;display:flex;position:fixed;top:0;transform:translate(105%)}.app-sidebar.open{transform:translate(0)}.sidebar-backdrop{z-index:25;background:#0f172a6b;display:block;position:fixed;inset:0}.sidebar-brand{border-bottom:1px solid var(--color-border);align-items:center;gap:10px;padding:18px 20px;display:flex}.sidebar-brand>span{background:var(--color-primary);color:#fff;border-radius:10px;justify-content:center;align-items:center;width:38px;height:38px;display:flex;overflow:hidden}.sidebar-brand>span svg{width:20px;height:20px}.sidebar-brand>span img{object-fit:cover;width:100%;height:100%}.sidebar-brand strong{flex:1;font-size:16px}.sidebar-close{color:var(--color-muted);cursor:pointer;background:0 0;border:0;display:block}.sidebar-nav{gap:3px;padding:14px 12px;display:grid;overflow-y:auto}.nav-item,.nav-group-toggle,.nav-subitem{color:var(--color-ink);cursor:pointer;text-align:right;background:0 0;border:0;border-radius:9px;align-items:center;gap:10px;width:100%;min-height:42px;padding:0 12px;display:flex}.nav-item svg,.nav-group-toggle svg,.nav-subitem svg{color:var(--color-muted);flex-shrink:0;width:19px;height:19px}.nav-item span,.nav-group-toggle span,.nav-subitem span{flex:1;font-size:14px}.nav-item:hover,.nav-group-toggle:hover,.nav-subitem:hover{background:#f8fafc}.nav-item.active,.nav-subitem.active{background:var(--color-primary-bg);color:var(--color-primary)}.nav-item.active svg,.nav-subitem.active svg{color:var(--color-primary)}.nav-group-toggle .chevron{width:15px;height:15px;margin-inline-start:-2px;transition:transform .15s}.nav-group-toggle .chevron.open{transform:rotate(180deg)}.nav-subitems{gap:2px;padding-inline-end:8px;display:grid}.nav-subitem{min-height:38px;padding-inline-end:34px}.nav-subitem svg{width:17px;height:17px}.app-topbar{background:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:5;align-items:center;gap:12px;padding:12px 16px;display:flex;position:sticky;top:0}.topbar-menu-btn{color:var(--color-ink);cursor:pointer;background:0 0;border:0}.topbar-title{flex:1;font-size:16px}.notifications-wrap{position:relative}.notifications-trigger{color:var(--color-muted);cursor:pointer;background:0 0;border:0;padding:6px;position:relative}.notifications-dot{background:var(--color-danger);color:#fff;border-radius:999px;justify-content:center;align-items:center;min-width:16px;height:16px;padding:0 3px;font-size:10px;font-weight:700;display:flex;position:absolute;top:-2px;right:-2px}.notifications-panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow-md);z-index:20;width:min(320px,90vw);position:absolute;top:calc(100% + 8px);left:0}.notifications-panel-head{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;padding:12px 14px;display:flex}.notifications-panel-head button{color:var(--color-muted);cursor:pointer;background:0 0;border:0}.notifications-list{gap:2px;max-height:320px;padding:6px;display:grid;overflow-y:auto}.notification-item{border-radius:8px;justify-content:space-between;gap:8px;padding:9px 8px;display:flex}.notification-item:hover{background:#f8fafc}.notification-item p{color:var(--color-ink);margin:0;font-size:13px;line-height:1.6}.notification-item button{color:var(--color-muted);cursor:pointer;background:0 0;border:0;flex-shrink:0;font-size:12px}.notifications-empty{color:var(--color-muted);text-align:center;margin:0;padding:20px 14px}.primary-action,.secondary-action{cursor:pointer;border:0;border-radius:9px;justify-content:center;align-items:center;gap:8px;font-weight:600;display:inline-flex}.primary-action{background:var(--color-primary);color:#fff;min-height:42px;padding:0 18px}.primary-action:disabled{cursor:not-allowed;opacity:.5}.primary-action svg{width:18px;height:18px}.secondary-action{background:var(--color-primary-bg);color:var(--color-primary);min-height:40px;padding:0 16px}.secondary-action svg{width:16px;height:16px}.student-alert{border-radius:9px;align-items:center;gap:10px;margin:12px 0 0;padding:11px 14px;display:flex}.student-alert.success{background:var(--color-success-bg);color:var(--color-success)}.student-alert.error{background:var(--color-danger-bg);color:var(--color-danger)}.student-alert.loading{background:var(--color-primary-bg);color:var(--color-primary)}.student-alert span{flex:1;font-size:14px}.student-alert button{color:currentColor;cursor:pointer;background:0 0;border:0;font-size:18px;line-height:1}.activation-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);flex-wrap:wrap;align-items:center;gap:16px;padding:18px 20px;display:flex}.activation-card.success{background:var(--color-success-bg);border-color:var(--color-success-border);animation:.5s activation-success}@keyframes activation-success{0%{opacity:0;transform:scale(.97)}to{opacity:1;transform:scale(1)}}.activation-card-icon{background:var(--color-primary-bg);color:var(--color-primary);border-radius:50%;justify-content:center;align-items:center;width:46px;height:46px;display:flex}.activation-card.success .activation-card-icon{background:var(--color-success-bg);color:var(--color-success)}.activation-card-icon svg{width:22px;height:22px}.activation-card>div{flex:1;min-width:200px}.activation-card strong{font-size:15px;display:block}.activation-card p{color:var(--color-muted);margin:3px 0 0;font-size:13px}.activation-card-form{align-items:center;gap:8px;width:min(340px,100%);display:flex}.activation-card-form input{border:1px solid var(--color-border);text-align:center;direction:ltr;background:#f8fafc;border-radius:8px;outline:0;flex:1;height:42px;padding:0 12px}.activation-card-form button{background:var(--color-primary);color:#fff;cursor:pointer;border:0;border-radius:8px;height:42px;padding:0 18px;font-weight:700}.activation-card-error{color:var(--color-danger);align-items:center;gap:6px;width:100%;margin:0;font-size:13px;display:flex}.activation-card-error svg{width:16px;height:16px}.subject-lock-overlay{z-index:1000;background:#0f172a8c;justify-content:center;align-items:center;padding:18px;display:flex;position:fixed;inset:0}.subject-lock-dialog{background:var(--color-surface);text-align:center;border-radius:14px;justify-items:center;gap:14px;width:100%;max-width:400px;padding:32px 26px 26px;display:grid;position:relative;box-shadow:0 24px 70px #0f172a47}.subject-lock-close{color:var(--color-muted);cursor:pointer;background:#f3f6f7;border:0;border-radius:999px;justify-content:center;align-items:center;width:34px;height:34px;display:flex;position:absolute;inset-block-start:12px;inset-inline-end:12px}.subject-lock-close:hover{color:var(--color-ink);background:#e5e7eb}.subject-lock-icon{color:#fff;background:linear-gradient(135deg,#4338ca,#eab308);border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;display:flex}.subject-lock-icon svg{width:26px;height:26px}.subject-lock-dialog h2{margin:0;font-size:19px}.subject-lock-dialog p{color:var(--color-muted);margin:0;font-size:14px}.subject-lock-form{gap:10px;width:100%;display:grid}.subject-lock-form input{border:1px solid var(--color-border);letter-spacing:1px;text-align:center;direction:ltr;background:#f8fafc;border-radius:9px;outline:0;width:100%;height:48px;padding:0 14px;font-size:16px;font-weight:700}.subject-lock-form input:focus{border-color:var(--color-primary-border);box-shadow:0 0 0 3px var(--color-primary-bg)}.subject-lock-form .primary-action{justify-content:center;width:100%;min-height:46px}.subject-lock-error{color:var(--color-danger);justify-content:center;align-items:center;gap:6px;margin:0;font-size:13px;display:flex}.subject-lock-error svg{flex-shrink:0;width:16px;height:16px}.subject-lock-support{border-top:1px solid var(--color-border);justify-items:center;gap:10px;width:100%;margin-top:4px;padding-top:16px;display:grid}.subject-lock-support>span{color:var(--color-muted);font-size:12.5px}.subject-lock-whatsapp{color:#166534;background:#dcfce7;border-radius:9px;justify-content:center;align-items:center;gap:8px;width:100%;min-height:44px;padding:0 18px;font-size:14px;font-weight:700;text-decoration:none;transition:background-color .15s;display:inline-flex}.subject-lock-whatsapp:hover{background:#bbf7d0}.subject-lock-whatsapp svg{width:18px;height:18px}.student-dark .subject-lock-dialog{background:var(--color-surface);color:var(--color-ink)}.student-dark .subject-lock-form input{border-color:var(--color-border);color:var(--color-ink);background:#1d2b33}.student-dark .subject-lock-close{background:#1d2b33}.progress-bar{background:#e5e7eb;border-radius:999px;width:100%;height:8px;overflow:hidden}.progress-bar i{background:var(--color-primary);height:100%;transition:width .3s;display:block}.progress-bar.tone-green i{background:var(--color-success)}.progress-bar.tone-orange i{background:var(--color-warning)}.progress-bar.tone-red i{background:var(--color-danger)}.dashboard-screen{gap:26px;display:grid}.dashboard-greeting h1{margin:0;font-size:24px}.dashboard-greeting p{color:var(--color-muted);margin:4px 0 0}.stat-tiles{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.stat-tile{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);gap:6px;padding:16px 18px;display:grid}.stat-tile span{border-radius:9px;justify-content:center;align-items:center;width:34px;height:34px;display:flex}.stat-tile.tone-primary span{background:var(--color-primary-bg);color:var(--color-primary)}.stat-tile.tone-green span{background:var(--color-success-bg);color:var(--color-success)}.stat-tile.tone-orange span{background:var(--color-warning-bg);color:var(--color-warning)}.stat-tile strong{font-size:24px}.stat-tile small{color:var(--color-muted)}.dashboard-section h2{margin:0 0 12px;font-size:17px}.dashboard-brand-intro{background:linear-gradient(135deg, var(--color-primary-bg), var(--color-accent-bg));border:1px solid var(--color-primary-border);border-radius:var(--radius);padding:18px 20px}.dashboard-brand-intro p{color:var(--color-ink);margin:0;font-size:14px;font-weight:600;line-height:1.8}.subject-tiles-grid{grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:18px;display:grid}.subject-tile{background:var(--color-surface);border:2px solid var(--color-border);cursor:pointer;text-align:center;border-radius:16px;gap:12px;padding:26px 18px;transition:border-color .15s,box-shadow .15s,transform .15s;display:grid;box-shadow:0 4px 16px #172b3a12}.subject-tile:hover{border-color:var(--color-primary);transform:translateY(-3px);box-shadow:0 12px 28px #4338ca29}.subject-tile-active{border-color:var(--color-primary-border)}.subject-tile-icon{background:linear-gradient(135deg, var(--color-primary-bg), var(--color-accent-bg));color:var(--color-primary);border-radius:14px;justify-content:center;align-items:center;width:56px;height:56px;margin-inline:auto;display:flex}.subject-tile-locked .subject-tile-icon{background:var(--color-locked-bg);color:var(--color-locked)}.subject-tile-icon svg{width:28px;height:28px}.subject-tile-name{color:var(--color-ink);font-size:17px;font-weight:800}.subject-tile-progress{gap:8px;display:grid}.subject-tile-meta{color:var(--color-muted);justify-content:space-between;align-items:center;font-size:12px;display:flex}.subject-tile-arrow{color:var(--color-primary);align-items:center;display:flex}.subject-tile-arrow svg{width:16px;height:16px}.subject-tile-badge{border-radius:999px;justify-content:center;align-items:center;gap:5px;margin-inline:auto;padding:5px 10px;font-size:11px;font-weight:700;display:inline-flex}.subject-tile-badge svg{width:13px;height:13px}.subject-tile-badge-free{background:var(--color-success-bg);color:var(--color-success)}.subject-tile-badge-locked{background:var(--color-locked-bg);color:var(--color-locked)}.subject-progress-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;display:grid}.subject-progress-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);gap:12px;padding:16px;display:grid}.subject-progress-head{align-items:center;gap:10px;display:flex}.subject-progress-head span{background:var(--color-primary-bg);color:var(--color-primary);border-radius:9px;justify-content:center;align-items:center;width:36px;height:36px;display:flex}.subject-progress-head strong{font-size:15px;display:block}.subject-progress-head small{color:var(--color-muted);font-size:12px}.subject-progress-foot{justify-content:space-between;align-items:center;display:flex}.subject-progress-foot small{color:var(--color-muted);font-size:12px}.subject-screen{gap:22px;display:grid}.subject-header{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);gap:10px;padding:20px;display:grid}.subject-header h1{margin:0;font-size:22px}.subject-header p{color:var(--color-muted);margin:0}.subject-tabs{border-bottom:1px solid var(--color-border);gap:6px;display:flex}.tab-btn{color:var(--color-muted);cursor:pointer;background:0 0;border:0;border-bottom:2px solid #0000;margin-bottom:-1px;padding:10px 6px;font-weight:600}.tab-btn.active{border-bottom-color:var(--color-primary);color:var(--color-primary)}.tab-panel{gap:22px;display:grid}.section-group h3{color:var(--color-muted);margin:0 0 10px;font-size:14px;font-weight:700}.card-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px;display:grid}.lecture-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);cursor:pointer;text-align:right;align-items:center;gap:12px;padding:14px;transition:border-color .15s,box-shadow .15s;display:flex}.lecture-card:hover:not(:disabled){border-color:var(--color-primary-border);box-shadow:var(--shadow-sm)}.lecture-card.locked{opacity:.75}.lecture-card.completed{background:var(--color-success-bg);border-color:var(--color-success-border)}.lecture-card-icon{background:var(--color-primary-bg);color:var(--color-primary);border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.lecture-card.completed .lecture-card-icon{background:var(--color-success-bg);color:var(--color-success)}.lecture-card.locked .lecture-card-icon{background:var(--color-locked-bg);color:var(--color-locked)}.lecture-card-icon svg{width:20px;height:20px}.lecture-card-body{flex:1;min-width:0}.lecture-card-body strong{font-size:14px;display:block}.lecture-card-meta{color:var(--color-muted);flex-wrap:wrap;gap:10px;margin-top:4px;font-size:12px;display:flex}.lecture-card-meta span{align-items:center;gap:4px;display:inline-flex}.lecture-card-meta svg{width:13px;height:13px}.lecture-card-progress{align-items:center;gap:8px;margin-top:8px;display:flex}.lecture-card-progress .progress-bar{flex:1}.lecture-card-progress small{color:var(--color-warning);text-align:left;min-width:30px;font-size:11px;font-weight:700}.lecture-card-status{color:var(--color-muted);flex-shrink:0;font-size:12px;font-weight:700}.lecture-card-status.done{color:var(--color-success)}.quiz-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);gap:12px;padding:16px;display:grid}.quiz-card.locked{opacity:.65}.quiz-card-head{align-items:flex-start;gap:10px;display:flex}.quiz-card-icon{background:var(--color-warning-bg);color:var(--color-warning);border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;width:38px;height:38px;display:flex}.quiz-card-icon svg{width:19px;height:19px}.quiz-card-head>div{flex:1;min-width:0}.quiz-card-head strong{font-size:14px;display:block}.quiz-card-head small{color:var(--color-muted);font-size:12px}.quiz-badge{white-space:nowrap;border-radius:999px;flex-shrink:0;padding:4px 9px;font-size:11px;font-weight:700}.quiz-badge.badge-available{background:var(--color-primary-bg);color:var(--color-primary)}.quiz-badge.badge-passed{background:var(--color-success-bg);color:var(--color-success)}.quiz-badge.badge-failed{background:var(--color-danger-bg);color:var(--color-danger)}.quiz-card-stats{border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);gap:6px;padding:10px 0;display:grid}.quiz-card-stats div{color:var(--color-muted);align-items:center;gap:6px;font-size:12.5px;display:flex}.quiz-card-stats svg{color:var(--color-muted);width:15px;height:15px}.focused-screen{gap:16px;display:grid}.back-link{color:var(--color-primary);cursor:pointer;background:0 0;border:0;align-self:start;align-items:center;gap:6px;padding:4px 0;font-weight:600;display:inline-flex}.back-link svg{width:16px;height:16px}.lesson-focus-card,.exam-start-card,.exam-live-card,.exam-result-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);gap:14px;padding:22px;display:grid}.lesson-focus-card.completed{border-color:var(--color-success-border)}.lesson-focus-head{align-items:center;gap:10px;display:flex}.lesson-focus-head span:first-child{color:var(--color-muted);flex:1;font-size:12px;font-weight:700}.lesson-focus-head h2{flex:2;margin:0;font-size:22px}.lesson-content{color:#334155;line-height:1.9}.lesson-content img{border-radius:8px;max-width:100%}.muted-text{color:var(--color-muted)}.pdf-link{border:1px solid var(--color-border);color:var(--color-primary);background:#f8fafc;border-radius:8px;align-items:center;gap:8px;padding:9px 12px;font-weight:700;text-decoration:none;display:inline-flex}.pdf-reader-pro{border:1px solid var(--color-border);background:#fff;border-radius:8px;position:relative;overflow:hidden}:is(.pdf-reader-pro:fullscreen,.pdf-reader-pro.focus-mode){z-index:900;background:#111827;border:0;border-radius:0;flex-direction:column;display:flex;position:fixed;inset:0}.pdf-progress{background:#e5e7eb;height:4px}.pdf-progress span{background:#4338ca;height:100%;transition:width .18s;display:block}.pdf-pro-toolbar{border-bottom:1px solid var(--color-border);background:#f8fafc;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px;padding:8px 10px;display:grid}.pdf-tool-group,.pdf-page-controls{align-items:center;gap:5px;display:flex}.pdf-tool-group:last-child{justify-content:flex-end}.pdf-pro-toolbar button,.pdf-study-tabs button,.pdf-icon-link{border:1px solid var(--color-border);color:#475569;cursor:pointer;background:#fff;border-radius:6px;justify-content:center;align-items:center;width:32px;height:32px;padding:0;display:flex}.pdf-pro-toolbar button:hover,.pdf-pro-toolbar 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