:root{--color-primary: #E9A2B5;--color-primary-dark: #A64E68;--color-secondary: #CFE5F2;--color-accent: #C99B39;--color-purple: #8765A6;--color-success: #2F8A68;--color-warning: #C7852D;--color-danger: #C7595C;--color-info: #4D80B8;--bg-page: #FBF9F6;--bg-card: #FFFFFF;--bg-secondary: #FFF0F3;--text-primary: #2D2A2A;--text-secondary: #66605E;--text-muted: #837C78;--text-on-primary: #FFFFFF;--border-light: #E9A2B5;--border-subtle: #EAE3DF;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--shadow-sm: 0 2px 8px rgba(70, 46, 50, .045);--shadow-md: 0 8px 24px rgba(70, 46, 50, .07);--shadow-lg: 0 18px 48px rgba(70, 46, 50, .1);--shadow-primary: 0 5px 14px rgba(166, 78, 104, .2);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--text-xs: 12px;--text-sm: 14px;--text-base: 16px;--text-lg: 18px;--text-xl: 20px;--text-2xl: 24px;--text-3xl: 30px;--text-4xl: 36px;--transition-fast: .15s ease;--transition-normal: .25s ease;--layout-max-width: 1200px;--layout-sidebar-width: 240px;--layout-header-height: 60px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-sans);background:var(--bg-page);color:var(--text-primary);font-size:var(--text-base);line-height:1.6}#root{min-height:100vh}button{font-family:inherit;cursor:pointer;border:none;transition:background-color var(--transition-fast),border-color var(--transition-fast),color var(--transition-fast),box-shadow var(--transition-fast),transform var(--transition-fast)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(166,78,104,.28);outline-offset:3px}input{font-family:inherit;outline:none}a{color:var(--color-primary-dark);text-decoration:none}.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--color-primary-dark);color:var(--text-on-primary);border-radius:var(--radius-md);padding:11px 20px;font-size:var(--text-base);font-weight:600;box-shadow:var(--shadow-primary)}.btn-primary:hover{background:#913f58;box-shadow:0 7px 18px #a64e683d;transform:translateY(-1px)}.btn-primary:active{transform:scale(.98)}.btn-primary:disabled,.btn-secondary:disabled{cursor:not-allowed;opacity:.56;transform:none;box-shadow:none}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;background:var(--bg-card);color:var(--color-primary-dark);border:1px solid var(--color-primary);border-radius:var(--radius-md);padding:10px 18px;font-size:var(--text-base);font-weight:500}.btn-secondary:hover{background:var(--bg-secondary);border-color:var(--color-primary-dark)}.btn-tertiary{display:inline-flex;align-items:center;justify-content:center;background:transparent;color:var(--text-muted);border-radius:var(--radius-md);padding:10px 16px;font-size:var(--text-sm);font-weight:500}.btn-tertiary:hover{background:#f4f0ed;color:var(--text-secondary)}.card{background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid rgba(234,227,223,.9);box-shadow:var(--shadow-md);padding:var(--space-lg)}.input-field{width:100%;background:var(--bg-card);border:1px solid #E3DAD6;border-radius:var(--radius-md);padding:12px 14px;font-size:var(--text-base);color:var(--text-primary);transition:border-color var(--transition-fast),box-shadow var(--transition-fast),background-color var(--transition-fast)}.input-field:focus{border-color:var(--color-primary-dark);box-shadow:0 0 0 3px #a64e681a}.input-field::placeholder{color:#a7a09c}.input-field:disabled{background:#f6f3f0;color:var(--text-muted);cursor:not-allowed}.badge{display:inline-flex;align-items:center;width:fit-content;background:var(--bg-secondary);color:var(--color-primary-dark);border-radius:var(--radius-full);padding:2px 12px;font-size:var(--text-xs);font-weight:600}.progress-bar{background:var(--border-subtle);border-radius:var(--radius-full);height:8px;overflow:hidden}.progress-bar-fill{background:var(--color-primary);height:100%;border-radius:var(--radius-full);transition:width var(--transition-normal)}.progress-bar-fill.success{background:var(--color-success)}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--layout-sidebar-width);background:var(--bg-card);border-right:1px solid var(--border-subtle);padding:var(--space-lg) var(--space-md);flex-shrink:0;position:sticky;top:0;height:100vh;overflow-y:auto}.sidebar-logo{font-size:var(--text-lg);font-weight:600;color:var(--color-primary-dark);margin-bottom:var(--space-xl);padding:0 var(--space-sm)}.sidebar-nav-item{display:flex;align-items:center;gap:var(--space-sm);padding:10px var(--space-md);border-radius:var(--radius-md);color:var(--text-secondary);font-size:var(--text-sm);margin-bottom:var(--space-xs);transition:all var(--transition-fast)}.sidebar-nav-item:hover{background:var(--bg-secondary)}.sidebar-nav-item.active{background:var(--bg-secondary);color:var(--color-primary-dark);border-left:3px solid var(--color-primary)}.main-content{flex:1;padding:var(--space-xl);max-width:var(--layout-max-width)}.page-title{font-size:var(--text-2xl);font-weight:600;margin-bottom:var(--space-md)}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-md);margin-bottom:var(--space-lg)}.stat-card{background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:var(--space-lg);text-align:center}.stat-card-value{font-size:var(--text-4xl);font-weight:600;color:var(--color-primary-dark)}.stat-card-label{font-size:var(--text-sm);color:var(--text-muted);margin-top:var(--space-xs)}.timeline{display:flex;flex-direction:column;gap:var(--space-md)}.time-block{display:flex;align-items:center;gap:var(--space-md);background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:var(--space-md) var(--space-lg);border-left:4px solid var(--border-subtle);transition:all var(--transition-fast)}.time-block:hover{box-shadow:var(--shadow-md)}.time-block.review{border-left-color:var(--color-secondary)}.time-block.attack{border-left-color:var(--color-primary)}.time-block.weekly_test{border-left-color:var(--color-purple)}.time-block.done{border-left-color:var(--color-success);opacity:.7}.time-block.skipped{border-left-color:var(--color-danger);opacity:.5}.time-block-time{font-size:var(--text-sm);color:var(--text-muted);min-width:50px;font-variant-numeric:tabular-nums}.time-block-content{flex:1}.time-block-title{font-size:var(--text-base);font-weight:500}.time-block-meta{font-size:var(--text-xs);color:var(--text-muted);margin-top:2px}.question-card{background:var(--bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:var(--space-2xl);margin-bottom:var(--space-lg)}.question-title{font-size:var(--text-xl);font-weight:500;margin-bottom:var(--space-lg);line-height:1.5}.option-item{display:flex;align-items:flex-start;gap:var(--space-md);background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:var(--space-md);margin-bottom:var(--space-sm);cursor:pointer;transition:all var(--transition-fast)}.option-item:hover{border-color:var(--color-primary);background:var(--bg-secondary)}.option-item.selected{border-color:var(--color-primary);border-width:2px}.option-item.correct{border-color:var(--color-success);background:#10b98114}.option-item.wrong{border-color:var(--color-danger);background:#ef444414}.option-label{width:28px;height:28px;border-radius:var(--radius-full);background:var(--bg-secondary);color:var(--color-primary-dark);display:flex;align-items:center;justify-content:center;font-weight:500;font-size:var(--text-sm);flex-shrink:0}.hint-box{background:#f59e0b1a;border-left:4px solid var(--color-warning);border-radius:var(--radius-sm);padding:var(--space-md);margin-top:var(--space-md);font-size:var(--text-sm);color:#92400e}.role-card{background:linear-gradient(135deg,var(--color-purple),var(--color-primary-dark));border-radius:var(--radius-xl);padding:var(--space-2xl);color:#fff;text-align:center}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--bg-secondary),var(--bg-page))}.login-card{background:var(--bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:var(--space-2xl);width:380px}.login-title{font-size:var(--text-2xl);font-weight:600;text-align:center;margin-bottom:var(--space-xl);color:var(--color-primary-dark)}.form-group{margin-bottom:var(--space-lg)}.form-label{display:block;font-size:var(--text-sm);color:var(--text-secondary);margin-bottom:var(--space-sm)}.error-msg{color:var(--color-danger);font-size:var(--text-sm);margin-top:var(--space-sm);text-align:center}.heatmap-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(16px,1fr));gap:3px;margin-top:var(--space-md)}.heatmap-cell{width:16px;height:16px;border-radius:3px;cursor:pointer}.heatmap-cell:hover{transform:scale(1.3)}.goal-box{background:#f4a5b81a;border-left:4px solid var(--color-primary);border-radius:var(--radius-sm);padding:var(--space-md);margin-top:var(--space-md);font-size:var(--text-sm);line-height:1.7}.prereq-item{padding:var(--space-md);border:1px solid var(--border-subtle);border-radius:var(--radius-md);margin-bottom:var(--space-md);background:var(--bg-card)}.prereq-title{font-weight:600;color:var(--color-primary-dark);margin-bottom:var(--space-sm);font-size:var(--text-base)}.prereq-content{color:var(--text-secondary);font-size:var(--text-sm);line-height:1.8}.concept-card{background:var(--bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);padding:var(--space-2xl);margin-bottom:var(--space-lg)}.analogy-box{background:#c4dfee40;border-left:4px solid var(--color-secondary);border-radius:var(--radius-sm);padding:var(--space-md);margin-top:var(--space-md);font-size:var(--text-sm);line-height:1.8}.analogy-label{font-weight:600;color:#0f6e56;margin-bottom:var(--space-xs);font-size:var(--text-xs)}.formula-box{background:#9b7cb814;border-left:4px solid var(--color-purple);border-radius:var(--radius-sm);padding:var(--space-md);margin-top:var(--space-md)}.formula-label{font-weight:600;color:var(--color-purple);margin-bottom:var(--space-xs);font-size:var(--text-xs)}.formula-text{font-family:SF Mono,Menlo,monospace;font-size:var(--text-base);color:var(--text-primary);line-height:1.7}.example-box{background:#10b98114;border-left:4px solid var(--color-success);border-radius:var(--radius-sm);padding:var(--space-md);margin-top:var(--space-md);font-size:var(--text-sm);line-height:1.8}.example-label{font-weight:600;color:#065f46;margin-bottom:var(--space-xs);font-size:var(--text-xs)}.example-question{background:var(--bg-secondary);border-radius:var(--radius-md);padding:var(--space-md);font-size:var(--text-lg);line-height:1.8;border:1px dashed var(--border-subtle)}.step-item{display:flex;gap:var(--space-md);margin-bottom:var(--space-md);align-items:flex-start}.step-num{width:28px;height:28px;border-radius:var(--radius-full);background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;flex-shrink:0;font-size:var(--text-sm)}.step-body{flex:1}.step-title{font-weight:600;color:var(--text-primary);margin-bottom:2px}.step-detail{color:var(--text-secondary);font-size:var(--text-sm);line-height:1.7}.answer-box{background:#10b9811a;border-radius:var(--radius-sm);padding:var(--space-md);margin-top:var(--space-lg);color:#065f46;line-height:1.7}.tip-box{background:#f59e0b1a;border-left:4px solid var(--color-warning);border-radius:var(--radius-sm);padding:var(--space-md);margin-top:var(--space-md);font-size:var(--text-sm);color:#92400e;line-height:1.7}.focus-card{background:linear-gradient(135deg,#f4a5b829,#c4dfee38);border:1px solid rgba(244,165,184,.4);border-radius:var(--radius-xl);padding:var(--space-2xl);margin-bottom:var(--space-lg);text-align:center}.focus-label{font-size:var(--text-sm);color:var(--color-primary-dark);margin-bottom:var(--space-sm)}.focus-title{font-size:var(--text-2xl);font-weight:600;color:var(--text-primary);margin-bottom:var(--space-xs)}.focus-chapter{font-size:var(--text-sm);color:var(--text-muted)}.score-dashboard{display:flex;gap:var(--space-lg);background:var(--bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);padding:var(--space-xl);margin-bottom:var(--space-lg);align-items:center}.score-main{flex:1}.score-label{font-size:var(--text-sm);color:var(--text-muted);margin-bottom:var(--space-xs)}.score-value{font-size:var(--text-4xl);font-weight:600;color:var(--color-primary-dark);line-height:1}.score-unit{font-size:var(--text-base);font-weight:400;color:var(--text-muted)}.score-gap{font-size:var(--text-sm);color:var(--color-purple);margin-top:var(--space-xs);font-weight:500}.score-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-md);flex-shrink:0}.score-metric{text-align:center;min-width:80px}.score-metric-value{font-size:var(--text-xl);font-weight:600;color:var(--text-primary)}.score-metric-label{font-size:var(--text-xs);color:var(--text-muted);margin-top:2px}.feynman-intro{display:flex;flex-direction:column;gap:4px;background:#9b7cb814;border-left:4px solid var(--color-purple);border-radius:var(--radius-sm);padding:var(--space-md);margin-bottom:var(--space-lg);font-size:var(--text-sm);color:var(--color-purple)}.feynman-intro span{color:var(--text-secondary);font-weight:400}.feynman-question{background:var(--bg-secondary);border-radius:var(--radius-md);padding:var(--space-lg);font-size:var(--text-lg);font-weight:500;line-height:1.8;border:1px dashed var(--color-purple);margin-bottom:var(--space-md)}.feynman-input{width:100%;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:var(--space-md);font-size:var(--text-base);font-family:inherit;line-height:1.8;resize:vertical}.feynman-input:focus{border-color:var(--color-purple);outline:none}.reminder-toast{position:fixed;right:var(--space-lg);bottom:var(--space-lg);width:320px;background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:var(--space-md) var(--space-lg);border-left:4px solid var(--color-primary);z-index:1000;animation:toast-in .25s ease}@keyframes toast-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.reminder-toast-title{font-weight:600;color:var(--color-primary-dark);font-size:var(--text-base);margin-bottom:var(--space-xs)}.reminder-toast-body{font-size:var(--text-sm);color:var(--text-secondary);line-height:1.7;margin-bottom:var(--space-sm)}.reminder-toast-actions{display:flex;justify-content:flex-end;gap:var(--space-sm)}.app-layout{background:radial-gradient(circle at 86% 4%,rgba(207,229,242,.28),transparent 27rem),var(--bg-page)}.sidebar{width:252px;display:flex;flex-direction:column;padding:26px 16px 18px;background:#ffffffdb;border-right-color:#e0d7d2bf}.brand-lockup{display:flex;align-items:center;gap:12px;padding:2px 8px 24px;color:inherit}.brand-mark{width:44px;height:44px;display:grid;place-items:center;border-radius:15px;background:linear-gradient(145deg,#f7d8e0,#ecaabd);color:#8f4259;font-size:21px;font-weight:700;box-shadow:0 5px 14px #a64e6821}.brand-copy{display:flex;flex-direction:column;line-height:1.25}.brand-copy strong{font-size:16px;font-weight:700;letter-spacing:.02em}.brand-copy small{margin-top:5px;color:var(--text-muted);font-size:9px;font-weight:700;letter-spacing:.15em}.sidebar-nav{display:flex;flex-direction:column;gap:20px}.nav-section{display:flex;flex-direction:column;gap:4px}.sidebar-section-label{padding:0 12px;margin:0 0 5px;color:#968c87;font-size:10px;font-weight:700;letter-spacing:.11em;text-transform:uppercase}.sidebar-nav-item{position:relative;gap:12px;min-height:44px;padding:9px 12px;border-radius:11px;color:#6e6865;font-size:13px;font-weight:500;transition:background-color var(--transition-fast),color var(--transition-fast),transform var(--transition-fast)}.sidebar-nav-item:hover{background:#fbf2f3;color:var(--color-primary-dark);transform:translate(2px)}.sidebar-nav-icon{width:23px;height:23px;display:grid;place-items:center;flex:0 0 auto;border-radius:8px;background:#f7f4f1;color:#847b76;font-size:14px}.sidebar-nav-arrow{margin-left:auto;color:transparent;font-size:18px;transition:color var(--transition-fast)}.sidebar-nav-item:hover .sidebar-nav-arrow{color:#c47a8d}.sidebar-nav-item.active{background:#fbecef;color:var(--color-primary-dark);border-left:0;font-weight:650}.sidebar-nav-item.active:before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:0 4px 4px 0;background:var(--color-primary-dark)}.sidebar-nav-item.active .sidebar-nav-icon{background:#f2d5dd;color:var(--color-primary-dark)}.sidebar-note{display:flex;align-items:center;gap:9px;margin:auto 4px 16px;padding:13px 11px;border-radius:12px;background:linear-gradient(120deg,#fff0f3f2,#eff7fbeb);color:#756c68;font-size:11px}.sidebar-note-mark{color:var(--color-primary-dark);font-size:16px}.sidebar-footer{display:flex;align-items:center;gap:10px;padding:14px 4px 0;border-top:1px solid var(--border-subtle)}.sidebar-avatar{display:grid;place-items:center;flex:0 0 auto;width:36px;height:36px;border-radius:50%;background:#f5e6ea;color:var(--color-primary-dark);font-size:14px;font-weight:700}.sidebar-user-meta{display:flex;flex:1;flex-direction:column;min-width:0;line-height:1.35}.sidebar-user-meta strong{overflow:hidden;color:var(--text-primary);font-size:12px;text-overflow:ellipsis;white-space:nowrap}.sidebar-user-meta span{margin-top:3px;color:var(--text-muted);font-size:10px}.logout-button{width:32px;height:32px;border:1px solid transparent;border-radius:9px;background:transparent;color:#8a817d;font-size:16px}.logout-button:hover{background:#f8ecee;color:var(--color-primary-dark)}.app-main-column{min-width:0;flex:1}.app-topbar{height:68px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 clamp(22px,4vw,52px);border-bottom:1px solid rgba(224,215,210,.62);background:#ffffff8f;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.topbar-breadcrumb{display:flex;align-items:center;gap:10px;color:var(--text-muted);font-size:12px}.topbar-breadcrumb strong{color:var(--text-primary);font-size:13px;font-weight:650}.topbar-divider{color:#c9bfba}.topbar-date{display:flex;align-items:center;gap:8px;color:#766f6b;font-size:12px}.topbar-date-icon{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#eff6f9;color:#6487a0;font-size:16px}.main-content{width:100%;max-width:1480px;margin:0 auto;padding:34px clamp(22px,4vw,52px) 56px}.page-title{color:var(--text-primary);font-size:clamp(26px,2.5vw,34px);font-weight:700;letter-spacing:-.035em;line-height:1.2}.page-heading{margin-bottom:25px}.page-eyebrow,.card-eyebrow{display:inline-block;color:var(--color-primary-dark);font-size:10px;font-weight:700;letter-spacing:.13em;text-transform:uppercase}.page-subtitle{margin-top:8px;color:var(--text-secondary);font-size:14px}.card,.stat-card,.question-card,.concept-card,.score-dashboard,.time-block{border:1px solid rgba(228,220,216,.85);box-shadow:0 8px 26px #462e320e}.card{transition:box-shadow var(--transition-normal),transform var(--transition-normal)}.card:hover{box-shadow:0 12px 30px #462e3213}.stat-card{text-align:left}.stat-card-value{font-size:32px;letter-spacing:-.04em}.stat-card-label{color:#7c7470}.question-card,.concept-card{padding:clamp(22px,3vw,38px)}.option-item{border-color:#e7dfdb}.option-item:hover{border-color:#d694a6;background:#fff8f9}.option-item.selected{border-color:var(--color-primary-dark);background:#fff7f8}.option-label{background:#f9e8ec;color:var(--color-primary-dark)}.progress-bar{background:#eee9e5;height:9px}.progress-bar-fill{background:linear-gradient(90deg,#d9869c,#b95c77)}.login-container{background:radial-gradient(circle at 18% 18%,rgba(244,208,218,.55),transparent 25rem),radial-gradient(circle at 88% 86%,rgba(207,229,242,.7),transparent 29rem),var(--bg-page)}.login-card{width:min(100%,420px);border:1px solid rgba(228,220,216,.9);box-shadow:0 24px 70px #462e321f}.login-title{color:var(--text-primary);letter-spacing:-.03em}.step-num{background:var(--color-primary-dark)}.page-loading{padding:64px 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7px;border-radius:6px;color:#8694b2;background:#90a2d414;font-size:8px}.material-card-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:15px}.material-formats{display:flex;gap:5px}.material-formats i{padding:4px 6px;border:1px solid rgba(151,170,222,.15);border-radius:5px;color:#8291b1;font-size:7px;font-style:normal;font-weight:700;letter-spacing:.04em}.material-open{display:inline-flex;align-items:center;gap:8px;padding:7px 10px;border:1px solid color-mix(in srgb,var(--material-accent) 23%,transparent);border-radius:8px;color:var(--material-accent);background:color-mix(in srgb,var(--material-accent) 7%,transparent);font-size:9px;font-weight:650}.material-open span{display:inline-block;font-size:12px;transition:transform .18s ease}.material-open:hover{border-color:color-mix(in srgb,var(--material-accent) 50%,transparent);background:color-mix(in srgb,var(--material-accent) 14%,transparent)}.material-open:hover span{transform:translate(2px,-2px)}.material-card-glow{position:absolute;right:-80px;bottom:-110px;z-index:-1;width:190px;height:190px;border-radius:50%;background:var(--material-accent);filter:blur(90px);opacity:.08;transition:opacity .22s ease}.material-card:hover .material-card-glow{opacity:.17}.library-empty{display:flex;min-height:210px;flex-direction:column;align-items:center;justify-content:center;border:1px dashed rgba(155,175,224,.2);border-radius:17px;color:#92a0bd;background:#11172b66}.library-empty>span{color:#7ee9d8;font-size:30px}.library-empty strong{margin-top:7px;color:#dde6fb;font-size:13px}.library-empty p{margin-top:4px;font-size:10px}.material-reader-backdrop{position:fixed;z-index:100;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:24px;background:#030610c2;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);animation:reader-backdrop-in .22s ease both}.material-reader{display:grid;width:min(1500px,100%);height:min(940px,100%);min-height:0;grid-template-rows:auto minmax(0,1fr);overflow:hidden;border:1px solid rgba(153,174,224,.24);border-radius:20px;background:#0e1428;box-shadow:0 34px 110px #0009,0 0 46px #48bdbd12;animation:reader-window-in .34s cubic-bezier(.2,.8,.2,1) both}.material-reader-header{position:relative;z-index:2;display:flex;min-height:72px;align-items:center;gap:13px;padding:12px 17px;border-bottom:1px solid rgba(153,174,224,.15);background:#0f162bf5}.reader-back-button,.reader-close-button{display:grid;width:34px;height:34px;flex:0 0 auto;place-items:center;border:1px solid rgba(153,174,224,.15);border-radius:10px;color:#a8b5d1;background:#8c9dcf14;font-size:17px}.reader-back-button:hover,.reader-close-button:hover{color:#8debdd;border-color:#55e7d061;background:#55e7d01a}.reader-heading{min-width:0;flex:1}.reader-heading>span{color:#8290b0;font-size:8px}.reader-heading 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span{margin-top:5px;color:#8997b6;font-size:9px}.reader-spinner{width:33px;height:33px;border:2px solid rgba(142,161,213,.16);border-top-color:#75eadb;border-right-color:#a79bff;border-radius:50%;animation:orbit-turn .9s linear infinite}.reader-error a{margin-top:14px;color:#84ebdd;font-size:10px}@keyframes material-enter{0%{opacity:0;transform:translateY(12px) scale(.99)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes reader-backdrop-in{0%{opacity:0}to{opacity:1}}@keyframes reader-window-in{0%{opacity:0;transform:translateY(17px) scale(.985)}to{opacity:1;transform:translateY(0) scale(1)}}@media (max-width: 1100px){.material-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 760px){.library-page{gap:18px}.library-hero{min-height:310px;align-items:flex-start;padding:26px 22px 54px}.library-hero-content{max-width:74%}.library-hero-content 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small{font-size:8px}.library-hero-orbit{top:55%;right:-14%;width:54vw}.material-grid{grid-template-columns:1fr}.material-card{min-height:220px}.reader-heading h2{max-width:130px;font-size:11px}.reader-heading>span{font-size:7px}.reader-actions{gap:5px}.reader-download{padding:7px;font-size:0}.reader-download span{font-size:13px}.reader-close-button,.reader-back-button{width:31px;height:31px}.reader-format-switch button,.reader-statusbar{font-size:7px}}@media (max-width: 760px){.auth-art{opacity:.44}.auth-atmosphere-orb--one{top:-15rem;left:-21rem}.auth-atmosphere-orb--two{right:-27rem;bottom:-18rem}}.admin-page{display:flex;flex-direction:column;gap:var(--space-lg)}.admin-page .page-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--space-md)}.admin-grid{display:grid;grid-template-columns:minmax(300px,.82fr) 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.btn-primary{justify-self:end}.admin-empty-state{min-height:250px;display:grid;place-content:center;justify-items:center;text-align:center;color:var(--text-muted)}.admin-empty-state>span{font-size:36px;color:var(--color-primary);margin-bottom:var(--space-sm)}.admin-empty-state p{margin:var(--space-xs) 0 0}.admin-broadcast-card{display:grid;grid-template-columns:minmax(220px,.8fr) minmax(300px,1.4fr);align-items:center;gap:var(--space-md)}.admin-broadcast-card h3{margin:3px 0}.admin-broadcast-card p{color:var(--text-muted);font-size:var(--text-xs);line-height:1.6}.admin-broadcast-footer{grid-column:2;display:flex;justify-content:space-between;align-items:center;gap:var(--space-md);color:var(--color-success);font-size:var(--text-sm)}@media (max-width: 1000px){.admin-grid{grid-template-columns:1fr}.admin-student-rows{max-height:330px}.admin-broadcast-card{grid-template-columns:1fr}.admin-broadcast-footer{grid-column:1}}@media (max-width: 600px){.admin-filters{grid-template-columns:1fr 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