@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap";:root{--color-bg: #09090b;--color-bg-gradient: radial-gradient(ellipse 80% 50% at 50% -15%, rgba(255, 255, 255, .07) 0%, transparent 65%), radial-gradient(ellipse 60% 40% at 85% 95%, rgba(255, 255, 255, .03) 0%, transparent 55%), #09090b;--color-surface: rgba(18, 18, 21, .72);--color-surface-solid: #121215;--color-surface-2: rgba(26, 26, 30, .68);--color-surface-3: rgba(38, 38, 44, .65);--color-surface-elevated: rgba(22, 22, 26, .88);--color-border: rgba(255, 255, 255, .09);--color-border-hover: rgba(255, 255, 255, .22);--color-border-subtle: rgba(255, 255, 255, .05);--glass-blur: blur(20px) saturate(140%);--glass-blur-heavy: blur(32px) saturate(160%);--color-primary: #fafafa;--color-primary-hover: #ffffff;--color-primary-fg: #09090b;--color-primary-muted: rgba(255, 255, 255, .1);--color-primary-glow: rgba(255, 255, 255, .16);--color-primary-rgb: 255, 255, 255;--color-accent: #e4e4e7;--color-accent-hover: #ffffff;--color-accent-glow: rgba(255, 255, 255, .12);--color-secondary: #a1a1aa;--color-secondary-hover: #d4d4d8;--color-secondary-glow: rgba(161, 161, 170, .15);--color-success: #10b981;--color-warning: #f59e0b;--color-danger: #ef4444;--color-info: #e4e4e7;--color-text: #fafafa;--color-text-secondary: #a1a1aa;--color-text-muted: #71717a;--color-student: #e4e4e7;--color-teacher: #d4d4d8;--color-branch-admin: #fafafa;--color-tech-admin: #ffffff;--color-admin: #a1a1aa;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--space-16: 64px;--radius-xs: 4px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-2xl: 24px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .25);--shadow-md: 0 4px 12px -2px rgba(0, 0, 0, .35), 0 2px 6px -1px rgba(0, 0, 0, .2);--shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, .45), 0 4px 8px -2px rgba(0, 0, 0, .25);--shadow-xl: 0 24px 48px -8px rgba(0, 0, 0, .55), 0 12px 20px -6px rgba(0, 0, 0, .3);--shadow-primary: 0 4px 20px -2px rgba(0, 0, 0, .5), 0 0 0 1px rgba(255, 255, 255, .14);--shadow-primary-lg: 0 8px 30px -4px rgba(0, 0, 0, .6), 0 0 0 1px rgba(255, 255, 255, .2);--shadow-accent: 0 4px 20px -2px rgba(0, 0, 0, .45), 0 0 0 1px rgba(255, 255, 255, .12);--shadow-inset: inset 0 1px 0 0 rgba(255, 255, 255, .16), inset 0 0 0 1px rgba(255, 255, 255, .05);--transition: .15s cubic-bezier(.2, .8, .2, 1);--transition-slow: .3s cubic-bezier(.2, .8, .2, 1);--transition-bounce: .2s cubic-bezier(.2, .8, .2, 1);--transition-spring: .22s cubic-bezier(.2, .8, .2, 1)}[data-theme=light]{--color-bg: #f4f4f6;--color-bg-gradient: radial-gradient(ellipse 80% 50% at 50% -15%, rgba(255, 255, 255, .9) 0%, transparent 65%), #f4f4f6;--color-surface: rgba(255, 255, 255, .78);--color-surface-solid: #ffffff;--color-surface-2: rgba(244, 244, 246, .82);--color-surface-3: rgba(228, 228, 231, .75);--color-surface-elevated: rgba(255, 255, 255, .92);--color-border: rgba(9, 9, 11, .09);--color-border-hover: rgba(9, 9, 11, .22);--color-border-subtle: rgba(9, 9, 11, .05);--color-primary: #09090b;--color-primary-hover: #18181b;--color-primary-fg: #fafafa;--color-primary-muted: rgba(9, 9, 11, .08);--color-primary-glow: rgba(9, 9, 11, .12);--color-primary-rgb: 9, 9, 11;--color-accent: #27272a;--color-accent-hover: #09090b;--color-accent-glow: rgba(9, 9, 11, .08);--color-secondary: #52525b;--color-secondary-hover: #27272a;--color-secondary-glow: rgba(82, 82, 91, .12);--color-text: #09090b;--color-text-secondary: #52525b;--color-text-muted: #71717a;--color-student: #27272a;--color-teacher: #3f3f46;--color-branch-admin: #18181b;--color-tech-admin: #09090b;--color-admin: #52525b;--shadow-sm: 0 1px 2px rgba(9, 9, 11, .05);--shadow-md: 0 4px 12px -2px rgba(9, 9, 11, .08), 0 2px 6px -1px rgba(9, 9, 11, .04);--shadow-lg: 0 12px 24px -4px rgba(9, 9, 11, .1), 0 4px 8px -2px rgba(9, 9, 11, .05);--shadow-xl: 0 24px 48px -8px rgba(9, 9, 11, .14), 0 12px 20px -6px rgba(9, 9, 11, .06);--shadow-primary: 0 4px 20px -2px rgba(9, 9, 11, .12), 0 0 0 1px rgba(9, 9, 11, .12);--shadow-primary-lg: 0 8px 30px -4px rgba(9, 9, 11, .18), 0 0 0 1px rgba(9, 9, 11, .16);--shadow-accent: 0 4px 20px -2px rgba(9, 9, 11, .1), 0 0 0 1px rgba(9, 9, 11, .1);--shadow-inset: inset 0 1px 0 0 rgba(255, 255, 255, .8), inset 0 0 0 1px rgba(9, 9, 11, .04)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--color-bg);background-image:var(--color-bg-gradient);background-attachment:fixed;color:var(--color-text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;position:relative}svg{color:inherit;flex-shrink:0}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--color-border-hover)}body:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse 80% 50% at 20% 15%,rgba(255,255,255,.03),transparent 55%),radial-gradient(ellipse 60% 40% at 80% 85%,rgba(255,255,255,.02),transparent 55%);pointer-events:none;z-index:-1}@keyframes fadeSlideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.fade-slide-up{animation:fadeSlideUp .5s cubic-bezier(.2,.8,.2,1) forwards}.app-layout{display:flex;min-height:100vh}.sidebar{width:268px;flex-shrink:0;background:var(--color-surface);backdrop-filter:var(--glass-blur-heavy);-webkit-backdrop-filter:var(--glass-blur-heavy);border-right:1px solid var(--color-border);display:flex;flex-direction:column;padding:var(--space-5) var(--space-4) var(--space-4);position:fixed;top:0;left:0;height:100vh;overflow-y:auto;overflow-x:hidden;z-index:200;transition:transform var(--transition-spring);box-shadow:var(--shadow-lg),var(--shadow-inset)}.sidebar.collapsed{transform:translate(-100%)}.sidebar-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#09090ba6;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);z-index:199;animation:fadeIn .2s ease}.sidebar-overlay.visible{display:block}.sidebar-logo-wrap{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-6);padding-bottom:var(--space-4);border-bottom:1px solid var(--color-border-subtle)}.sidebar-toggle-btn-close{background:transparent;border:1px solid transparent;color:var(--color-text-muted);cursor:pointer;padding:6px;border-radius:var(--radius-sm);transition:all var(--transition);width:30px;height:30px;display:flex;align-items:center;justify-content:center}.sidebar-toggle-btn-close:hover{background:var(--color-primary-muted);border-color:var(--color-border);color:var(--color-text)}.main-content{margin-left:268px;flex:1;padding:var(--space-8);transition:margin-left var(--transition-spring),max-width var(--transition-spring);position:relative;min-height:100vh}.main-content.expanded{margin-left:0}.sidebar-toggle-btn-open{position:fixed;top:var(--space-4);left:var(--space-4);background:var(--color-surface-elevated);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--color-border);color:var(--color-text);width:40px;height:40px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-md),var(--shadow-inset);transition:all var(--transition);z-index:50}.sidebar-toggle-btn-open:hover{background:var(--color-surface-3);color:var(--color-primary);border-color:var(--color-border-hover);box-shadow:var(--shadow-primary);transform:translateY(-1px)}.bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;background:var(--color-surface-elevated);backdrop-filter:var(--glass-blur-heavy);-webkit-backdrop-filter:var(--glass-blur-heavy);border-top:1px solid var(--color-border);z-index:200;padding:var(--space-2) var(--space-2) calc(var(--space-2) + env(safe-area-inset-bottom));box-shadow:0 -8px 32px #00000059}.bottom-nav-inner{display:flex;justify-content:space-around;align-items:center}.bottom-nav-link{display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 10px;border-radius:var(--radius-md);text-decoration:none;color:var(--color-text-muted);font-size:10px;font-weight:600;font-family:inherit;transition:all var(--transition);min-width:52px;cursor:pointer}.bottom-nav-link svg{width:20px;height:20px}.bottom-nav-link.active{color:var(--color-text);background:var(--color-primary-muted)}.logo{display:flex;align-items:center;gap:var(--space-3);text-decoration:none;flex:1;min-width:0}.logo-icon{width:36px;height:36px;background:var(--color-primary);color:var(--color-primary-fg);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:800;box-shadow:0 2px 10px #00000040,inset 0 1px #fff6;transition:transform var(--transition),box-shadow var(--transition);flex-shrink:0}.logo:hover .logo-icon{transform:translateY(-1px);box-shadow:0 4px 14px #00000059}.logo-text{font-size:17px;font-weight:800;color:var(--color-text);letter-spacing:-.03em}.nav-section{margin-bottom:var(--space-5)}.nav-section-label{font-size:10.5px;font-weight:700;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;padding:0 var(--space-3);display:flex;align-items:center;justify-content:space-between}.nav-link{display:flex;align-items:center;gap:var(--space-3);padding:8.5px var(--space-3);border-radius:10px;text-decoration:none;color:var(--color-text-secondary);font-size:13.5px;font-weight:500;transition:all var(--transition);margin-bottom:3px;position:relative;border:1px solid transparent}.nav-link:hover{background:var(--color-primary-muted);color:var(--color-text);border-color:var(--color-border-subtle);transform:translate(2px)}.nav-link.active{background:var(--color-surface-2);color:var(--color-text);border-color:var(--color-border-hover);box-shadow:0 2px 8px #00000026,var(--shadow-inset);font-weight:600}.nav-link.active:before{content:"";position:absolute;left:-2px;top:6px;bottom:6px;width:3.5px;background:var(--color-text);border-radius:4px;box-shadow:0 0 8px #fff6}.nav-link-icon{width:20px;height:20px;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:inherit;transition:transform var(--transition)}.nav-link:hover .nav-link-icon{transform:scale(1.08)}.sidebar-footer{margin-top:auto;padding-top:var(--space-4);border-top:1px solid var(--color-border);display:flex;flex-direction:column;gap:var(--space-2)}.user-mini{display:flex;align-items:center;gap:var(--space-3);padding:10px 12px;border-radius:12px;cursor:pointer;transition:all var(--transition);border:1px solid var(--color-border);background:var(--color-surface-2);box-shadow:var(--shadow-inset)}.user-mini:hover{border-color:var(--color-border-hover);background:var(--color-surface-3);transform:translateY(-1px)}.user-mini-avatar{width:36px;height:36px;border-radius:var(--radius-full);background:var(--color-primary);color:var(--color-primary-fg);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0;overflow:hidden;border:1px solid var(--color-border-hover);box-shadow:0 2px 6px #0003}.user-mini-avatar img{width:100%;height:100%;object-fit:cover}.user-mini-info{overflow:hidden;flex:1}.user-mini-name{font-size:13px;font-weight:600;color:var(--color-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:-.01em}.user-mini-role{font-size:11px;color:var(--color-text-muted);display:flex;align-items:center;gap:5px;margin-top:1px}.user-mini-logout{display:flex;align-items:center;justify-content:center;gap:6px;font-size:12px;font-weight:600;padding:7px 11px;border-radius:8px;background:var(--color-primary-muted);border:1px solid var(--color-border);color:var(--color-text-secondary);cursor:pointer;transition:all var(--transition);flex-shrink:0}.user-mini-logout:hover{background:#ef444429;border-color:#ef444466;color:#ef4444;transform:translateY(-1px)}.user-mini-logout svg{width:14px;height:14px}.card{background:var(--color-surface);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);transition:border-color var(--transition),box-shadow var(--transition);box-shadow:var(--shadow-sm),var(--shadow-inset);position:relative;overflow:hidden}.card-interactive{cursor:pointer}.card-interactive:active{transform:scale(.98)!important;box-shadow:var(--shadow-sm)!important}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);opacity:0;transition:opacity var(--transition)}.card:hover{border-color:var(--color-border-hover)}.card:hover:before{opacity:1}.card-header{margin-bottom:var(--space-6);padding-bottom:var(--space-4);border-bottom:1px solid var(--color-border-subtle);display:flex;align-items:center;justify-content:space-between}.card-title{font-size:18px;font-weight:700;color:var(--color-text);letter-spacing:-.015em}.card-subtitle{font-size:13px;color:var(--color-text-secondary);margin-top:4px}.card-glass{background:var(--color-surface);backdrop-filter:var(--glass-blur-heavy);-webkit-backdrop-filter:var(--glass-blur-heavy);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--space-8);box-shadow:var(--shadow-xl),var(--shadow-inset)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:9px var(--space-5);border-radius:var(--radius-md);font-size:13.5px;font-weight:600;font-family:inherit;cursor:pointer;border:1px solid transparent;transition:all var(--transition-bounce);text-decoration:none;white-space:nowrap;position:relative;overflow:hidden;-webkit-user-select:none;user-select:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:#fafafa;color:#09090b;border:1px solid rgba(255,255,255,.9);font-weight:600;box-shadow:0 2px 10px #0000004d,inset 0 1px #fff}.btn-primary:hover:not(:disabled){background:#fff;transform:translateY(-1px);box-shadow:0 4px 16px #0006,inset 0 1px #fff}[data-theme=light] .btn-primary{background:#09090b;color:#fafafa;border:1px solid rgba(9,9,11,.9);box-shadow:0 2px 10px #09090b2e,inset 0 1px #ffffff26}[data-theme=light] .btn-primary:hover:not(:disabled){background:#18181b;color:#fff;transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background:#ffffff12;color:var(--color-text);border:1px solid var(--color-border);box-shadow:var(--shadow-inset);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur)}[data-theme=light] .btn-secondary{background:#09090b0d}.btn-secondary:hover:not(:disabled){background:var(--color-primary-muted);border-color:var(--color-border-hover);transform:translateY(-1px);box-shadow:var(--shadow-md),var(--shadow-inset)}.btn-danger{background:#ef44441a;color:var(--color-danger);border:1px solid rgba(239,68,68,.28)}.btn-danger:hover:not(:disabled){background:#ef44442e;border-color:#ef444473;transform:translateY(-1px)}.btn-success{background:#10b9811a;color:var(--color-success);border:1px solid rgba(16,185,129,.28)}.btn-success:hover:not(:disabled){background:#10b98133}.btn-sm{padding:6px 12px;font-size:12.5px}.btn-lg{padding:13px 28px;font-size:15px}.btn-icon{padding:var(--space-2);border-radius:var(--radius-sm)}.form-group{display:flex;flex-direction:column;gap:var(--space-2);margin-bottom:var(--space-5)}.form-label{font-size:12.5px;font-weight:600;color:var(--color-text-secondary);letter-spacing:.01em}.form-input{width:100%;padding:10px var(--space-4);background:var(--color-surface-2);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text);font-size:14px;font-family:inherit;transition:all var(--transition);outline:none;box-shadow:inset 0 1px 2px #0000001f}.form-input:hover{border-color:var(--color-border-hover)}.form-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-muted),inset 0 1px 2px #0000001a;background:var(--color-surface-elevated)}.form-input::placeholder{color:var(--color-text-muted);opacity:.7}.form-input::-webkit-calendar-picker-indicator{filter:invert(.75);cursor:pointer}[data-theme=light] .form-input::-webkit-calendar-picker-indicator{filter:none}.form-select{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:40px}.form-error{font-size:12px;color:var(--color-danger);margin-top:4px;display:flex;align-items:center;gap:4px}.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--radius-full);font-size:11px;font-weight:600;letter-spacing:.03em;text-transform:uppercase;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.badge-student{background:var(--color-primary-muted);color:var(--color-text);border:1px solid var(--color-border)}.badge-teacher{background:var(--color-primary-muted);color:var(--color-text-secondary);border:1px solid var(--color-border)}.badge-admin{background:var(--color-primary);color:var(--color-primary-fg);border:1px solid var(--color-border-hover)}.badge-active{background:#10b9811f;color:var(--color-success);border:1px solid rgba(16,185,129,.25)}.badge-inactive{background:#ef44441f;color:var(--color-danger);border:1px solid rgba(239,68,68,.25)}.profile-header{display:flex;align-items:flex-start;gap:var(--space-8);margin-bottom:var(--space-10);background:var(--color-surface);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);padding:var(--space-6);border-radius:var(--radius-2xl);border:1px solid var(--color-border);box-shadow:var(--shadow-md),var(--shadow-inset)}.avatar-wrapper{position:relative;flex-shrink:0}.avatar{width:120px;height:120px;border-radius:var(--radius-2xl);background:var(--color-surface-3);display:flex;align-items:center;justify-content:center;font-size:42px;font-weight:800;color:var(--color-text);overflow:hidden;box-shadow:var(--shadow-primary);border:1px solid var(--color-border-hover)}.avatar img{width:100%;height:100%;object-fit:cover}.avatar-upload-btn{position:absolute;bottom:-6px;right:-6px;width:28px;height:28px;background:var(--color-primary);color:var(--color-primary-fg);border-radius:var(--radius-full);border:2px solid var(--color-bg);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:12px;transition:transform var(--transition)}.avatar-upload-btn:hover{transform:scale(1.1)}.profile-name{font-size:28px;font-weight:800;color:var(--color-text);line-height:1.2}.profile-username{font-size:15px;color:var(--color-text-muted);margin-top:2px}.profile-meta{display:flex;flex-wrap:wrap;gap:var(--space-3);margin-top:var(--space-4);align-items:center}.profile-field-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:var(--space-4)}.profile-field{padding:var(--space-4);background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-md)}.profile-field-label{font-size:11px;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:var(--space-1)}.profile-field-value{font-size:15px;font-weight:500;color:var(--color-text)}.dropzone{border:1.5px dashed var(--color-border-hover);border-radius:var(--radius-lg);padding:var(--space-10);text-align:center;cursor:pointer;transition:all var(--transition);background:var(--color-surface-2)}.dropzone:hover,.dropzone.active{border-color:var(--color-primary);background:var(--color-primary-muted)}.dropzone-icon{font-size:36px;margin-bottom:var(--space-3);color:var(--color-text-secondary)}.dropzone-text{font-size:15px;color:var(--color-text-secondary);margin-bottom:var(--space-2)}.dropzone-hint{font-size:12px;color:var(--color-text-muted)}.file-list{display:flex;flex-direction:column;gap:var(--space-3)}.file-item{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3) 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