:root{--bg-primary:#f2f2f7;--bg-secondary:#fff;--bg-tertiary:#ffffffbf;--bg-elevated:#ffffffd9;--text-primary:#1c1c1e;--text-secondary:#8e8e93;--text-tertiary:#c7c7cc;--accent-blue:#007aff;--accent-blue-glow:#007aff4d;--accent-green:#34c759;--accent-green-glow:#34c7594d;--accent-red:#ff3b30;--accent-red-glow:#ff3b304d;--shadow-subtle:0 4px 14px 0 #0000000d;--shadow-elevated:0 8px 30px #00000014;--shadow-float:0 20px 40px #0000001f;--backdrop-blur:blur(24px) saturate(180%);--radius-sm:10px;--radius-md:18px;--radius-lg:24px;--radius-xl:32px;--radius-full:9999px;--transition-spring:.4s cubic-bezier(.175, .885, .32, 1.275);--transition-smooth:.3s cubic-bezier(.25, .8, .25, 1);--transition-fast:.15s ease-out}@media (prefers-color-scheme:dark){:root{--bg-primary:#000;--bg-secondary:#1c1c1e;--bg-tertiary:#1c1c1ebf;--bg-elevated:#2c2c2ed9;--text-primary:#fff;--text-secondary:#ebebf599;--text-tertiary:#ebebf54d;--accent-blue:#0a84ff;--accent-green:#30d158;--accent-red:#ff453a;--shadow-subtle:0 4px 14px 0 #0000004d;--shadow-elevated:0 8px 30px #0006;--shadow-float:0 20px 40px #00000080}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;background-image:radial-gradient(circle at 15%,#007aff0a,#0000 50%),radial-gradient(circle at 85% 30%,#34c7590a,#0000 50%);background-attachment:fixed;min-height:100vh;padding:2vw;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Pro Icons,Helvetica Neue,Helvetica,Arial,sans-serif;line-height:1.5}h1,h2,h3,h4,h5,h6{letter-spacing:-.022em;font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Helvetica Neue,sans-serif}.container{max-width:1600px;margin:0 auto}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-1{gap:.25rem}.gap-2{gap:.5rem}.gap-3{gap:.75rem}.gap-4{gap:1rem}.gap-6{gap:1.5rem}.title{color:var(--text-primary);letter-spacing:-.04em;background:linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:.25rem;font-size:2.5rem;font-weight:800}.subtitle{color:var(--text-secondary);letter-spacing:-.01em;margin-bottom:2.5rem;font-size:1.1rem;font-weight:500}.card{background:var(--bg-tertiary);-webkit-backdrop-filter:var(--backdrop-blur);border-radius:var(--radius-xl);box-shadow:var(--shadow-elevated);transition:transform var(--transition-spring), box-shadow var(--transition-smooth);border:1px solid #ffffff1a;padding:2.5rem}.card:hover{box-shadow:var(--shadow-float);transform:translateY(-2px)}.input{background:var(--bg-secondary);border-radius:var(--radius-md);width:100%;box-shadow:var(--shadow-subtle);color:var(--text-primary);transition:all var(--transition-fast);border:none;outline:none;padding:1rem 1.25rem;font-size:1.05rem;font-weight:500}.input::placeholder{color:var(--text-tertiary)}.input:focus,.select:focus{box-shadow:0 0 0 4px var(--accent-blue-glow), var(--shadow-subtle);transform:scale(1.01)}.select{appearance:none;background-color:var(--bg-secondary);border-radius:var(--radius-full);box-shadow:var(--shadow-subtle);color:var(--text-primary);transition:all var(--transition-fast);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238E8E93' 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-position:right 1rem center;background-repeat:no-repeat;background-size:1rem;border:none;outline:none;padding:.8rem 2.5rem .8rem 1.25rem;font-size:.95rem;font-weight:500}.search-input{border-radius:var(--radius-full);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%238E8E93'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z'%3E%3C/path%3E%3C/svg%3E");background-position:1rem;background-repeat:no-repeat;background-size:1.25rem;max-width:100%;padding-left:3rem}.btn{border-radius:var(--radius-full);letter-spacing:-.01em;cursor:pointer;transition:all var(--transition-spring);border:none;justify-content:center;align-items:center;padding:1rem 1.75rem;font-size:1.05rem;font-weight:600;display:inline-flex;position:relative;overflow:hidden}.btn:after{content:"";background:var(--bg-secondary);opacity:0;transition:opacity var(--transition-fast);position:absolute;inset:0}.btn:hover{transform:scale(1.03)}.btn:active{transform:scale(.97)}.btn:active:after{opacity:.1}.btn-primary{background:var(--accent-blue);color:#fff;box-shadow:0 4px 12px var(--accent-blue-glow)}.btn-danger{color:var(--accent-red);background:#ff3b301a;padding:.5rem 1rem;font-size:.9rem}.btn-danger:hover{background:#ff3b3026}.tracker-container{border-radius:var(--radius-xl);background:var(--bg-secondary);max-height:600px;box-shadow:var(--shadow-elevated);scrollbar-width:thin;scrollbar-color:#0000001a transparent;border:1px solid #00000005;margin-top:2rem;overflow:auto}.tracker-container::-webkit-scrollbar{height:8px}.tracker-container::-webkit-scrollbar-track{background:0 0}.tracker-container::-webkit-scrollbar-thumb{border-radius:var(--radius-full);background-color:#0000001a}.tracker-table{border-collapse:separate;border-spacing:0;width:100%;min-width:1200px}.tracker-table th,.tracker-table td{text-align:center;white-space:nowrap;border-bottom:1px solid #0000001a;border-right:1px solid #0000001a;padding:.75rem .5rem}.tracker-table th:first-child,.tracker-table td:first-child{border-left:1px solid #0000001a}.tracker-table th{border-top:1px solid #0000001a}@media (prefers-color-scheme:dark){.tracker-table th,.tracker-table td{border-bottom:1px solid #ffffff0d}.tracker-container{border:1px solid #ffffff0d}}.tracker-table th{color:var(--text-secondary);background:var(--bg-elevated);-webkit-backdrop-filter:var(--backdrop-blur);z-index:10;letter-spacing:.02em;text-transform:uppercase;border-bottom:1px solid #0000001a;border-right:1px solid #0000001a;font-size:.85rem;font-weight:600;position:sticky;top:0}.tracker-table thead tr:nth-child(2) th{top:41px}.tracker-table th.student-name-col{z-index:20;text-align:left;min-width:140px;padding-left:1.5rem;left:0;box-shadow:2px 0 8px #00000005}.tracker-table td.student-name-col{color:var(--text-primary);background:var(--bg-elevated);-webkit-backdrop-filter:var(--backdrop-blur);z-index:5;text-align:left;padding-left:1.5rem;font-size:1.1rem;font-weight:600;position:sticky;left:0;box-shadow:2px 0 8px #00000005}.tracker-table tbody tr{transition:background-color var(--transition-fast)}.tracker-table tbody tr:hover{background-color:var(--bg-tertiary)}.check-toggle{appearance:none;background:var(--bg-primary);border:1.5px solid var(--text-tertiary);cursor:pointer;width:28px;height:28px;transition:all var(--transition-spring);vertical-align:middle;border-radius:50%;outline:none;justify-content:center;align-items:center;display:inline-flex;position:relative}.check-toggle:hover{background:var(--bg-secondary);transform:scale(1.1)}.check-toggle:active{transform:scale(.9)}.check-toggle:checked{background:var(--accent-green);border-color:var(--accent-green);box-shadow:0 2px 8px var(--accent-green-glow)}.check-toggle:checked:after{content:"";border:2.5px solid #fff;border-width:0 2.5px 2.5px 0;width:6px;height:12px;position:absolute;transform:rotate(45deg)translate(-1px,-1px)}@media (prefers-color-scheme:dark){.check-toggle{background:#ffffff0d;border-color:#ffffff26}}.student-add-form{align-items:center;gap:1rem;margin-bottom:2rem;display:flex}@keyframes spatialReveal{0%{opacity:0;filter:blur(10px);transform:translateY(20px)scale(.98)}to{opacity:1;filter:blur();transform:translateY(0)scale(1)}}.fade-in{animation:.6s cubic-bezier(.2,.8,.2,1) forwards spatialReveal}.progress-wrapper{background:var(--bg-primary);border-radius:var(--radius-full);width:100%;height:6px;margin-top:10px;position:relative;overflow:hidden}@media (prefers-color-scheme:dark){.progress-wrapper{background:#ffffff1a}}.progress-fill{background:var(--accent-blue);border-radius:var(--radius-full);height:100%;transition:width .8s cubic-bezier(.2,.8,.2,1);position:relative}.progress-fill:after{content:"";border-radius:var(--radius-full);background:linear-gradient(90deg,#fff0 0%,#fff6 50%,#fff0 100%);animation:2s linear infinite shimmer;position:absolute;inset:0}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.category-header{border-bottom:2px solid #0000000d}@media (prefers-color-scheme:dark){.category-header{border-bottom:2px solid #ffffff1a}}