:root{color-scheme:light;--bg: #f2f2f7;--surface: #ffffff;--surface-2: rgba(120, 120, 128, .12);--surface-3: rgba(120, 120, 128, .2);--border: transparent;--border-strong: rgba(60, 60, 67, .18);--separator: rgba(60, 60, 67, .12);--text: #1c1c1e;--muted: #6e6e73;--faint: #a2a2a8;--primary: #7b6cf6;--primary-strong: #6556db;--primary-tint: rgba(123, 108, 246, .1);--danger: #dc2626;--danger-tint: rgba(220, 38, 38, .08);--shadow-xs: 0 1px 2px rgba(16, 16, 20, .04);--shadow-sm: 0 1px 2px rgba(16, 16, 20, .05), 0 2px 6px rgba(16, 16, 20, .04);--shadow-md: 0 2px 6px rgba(16, 16, 20, .06), 0 8px 20px rgba(16, 16, 20, .08);--shadow-lg: 0 4px 12px rgba(16, 16, 20, .08), 0 16px 40px rgba(16, 16, 20, .12);--radius-xl: 16px;--radius-lg: 14px;--radius-md: 12px;--radius-sm: 10px;--font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", Roboto, Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-left: env(safe-area-inset-left, 0px);--safe-right: env(safe-area-inset-right, 0px);--tap-min: 44px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{-webkit-text-size-adjust:100%;-webkit-overflow-scrolling:touch}html,body,#root{min-height:100%}body{margin:0;color:var(--text);font-family:var(--font-body);font-size:16px;line-height:1.5;background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overscroll-behavior:none}button,input,select,textarea{font:inherit}button{cursor:pointer;touch-action:manipulation}button:disabled{cursor:not-allowed;opacity:.5}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.app-shell{position:relative;z-index:1;max-width:520px;margin:0 auto;padding:calc(20px + var(--safe-top)) max(20px,var(--safe-left)) calc(112px + var(--safe-bottom)) max(20px,var(--safe-right))}.topbar{margin-bottom:20px}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:10px;color:var(--muted);font-weight:600}.topbar h1{margin:2px 0 0;font-family:var(--font-display);font-size:26px;font-weight:700;line-height:1.25;letter-spacing:-.01em}.topbar p{margin:4px 0 0;color:var(--muted);font-size:13px}.topbar-copy{min-width:0}.topbar-spacer{display:none}.tabs{position:fixed;left:max(16px,var(--safe-left));right:max(16px,var(--safe-right));bottom:calc(16px + var(--safe-bottom));z-index:20;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;padding:6px;border-radius:18px;background:#fafafcd1;-webkit-backdrop-filter:blur(24px) saturate(1.8);backdrop-filter:blur(24px) saturate(1.8);box-shadow:var(--shadow-md)}.tab{border:0;background:transparent;border-radius:12px;padding:8px 4px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--muted);min-height:50px;font-size:11px;font-weight:500;white-space:nowrap;transition:background .2s,color .2s,transform .2s cubic-bezier(.34,1.56,.64,1)}.tab:active{background:var(--surface-2);transform:scale(.94)}.tab.active,.tab.active span{color:var(--primary)}.tab span:first-child{display:flex;align-items:center;justify-content:center;line-height:1}.tab svg{display:block}.content{display:flex;flex-direction:column;gap:16px;min-height:auto;animation:fadeUp .4s cubic-bezier(.22,1.2,.36,1)}@keyframes fadeUp{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.grid-2,.stack{display:flex;flex-direction:column;gap:16px}.panel{background:var(--surface);border-radius:var(--radius-xl);padding:20px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:16px}.panel-head h2{margin:0;font-family:var(--font-display);font-size:17px;font-weight:600;letter-spacing:-.01em}.panel-head p{margin:2px 0 0;color:var(--muted);font-size:12px}.cards{display:flex;flex-direction:column;gap:10px}.mini-card,.sub-card,.stat{background:var(--surface);border:none;border-radius:var(--radius-md);box-shadow:none}.mini-card,.sub-card{padding:14px}.mini-card{text-align:left;width:100%;cursor:pointer;transition:background .2s,transform .2s cubic-bezier(.34,1.56,.64,1)}.mini-card:hover{background:var(--surface-2)}.mini-card:active{transform:scale(.97)}.mini-card.active{box-shadow:inset 0 0 0 1.5px var(--primary)}.mini-card-title{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px}.mini-card-title strong{font-size:16px;margin:0;color:var(--text);font-weight:600}.mini-card-title span{color:var(--muted);font-size:12px;white-space:nowrap;margin:0}.row{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted)}.row-stack{display:flex;flex-direction:column;align-items:stretch;gap:10px}.form-grid{display:flex;flex-direction:column;gap:14px;margin-bottom:14px}.form-grid label,.inline-label{display:flex;flex-direction:column;gap:6px}.form-grid label span,.inline-label span{font-size:13px;font-weight:500;color:var(--muted)}input,select,textarea{border:1px solid transparent;border-radius:var(--radius-sm);padding:10px 12px;background:var(--surface-2);color:var(--text);outline:none;font-size:15px;min-height:42px;width:100%;-webkit-appearance:none;appearance:none;transition:background .2s,box-shadow .2s}select{background-image:none;padding-right:12px;-webkit-appearance:auto;appearance:auto}input:focus,select:focus,textarea:focus{box-shadow:0 0 0 3px var(--primary-tint)}textarea{resize:vertical;min-height:80px;line-height:1.5}.primary,.ghost,.seg{border-radius:var(--radius-sm);padding:10px 16px;font-size:14px;font-weight:500;min-height:42px;transition:background .2s,border-color .2s,color .2s,transform .2s cubic-bezier(.34,1.56,.64,1);white-space:nowrap}.primary{color:#fff;background:var(--primary);border:none}.primary:hover{background:var(--primary-strong)}.primary:active{transform:scale(.96)}.ghost,.seg{background:var(--surface-2);color:var(--text);border:none}.ghost:hover,.seg:hover{background:var(--surface-2)}.ghost:active,.seg:active{background:var(--surface-3);transform:scale(.96)}.danger{color:var(--danger)}.ghost.danger:hover{background:var(--danger-tint)}.primary:disabled,.ghost:disabled,.seg:disabled{opacity:.5}.split-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:8px 0 12px;flex-wrap:wrap}.segmented{display:inline-flex;gap:2px;background:var(--surface-2);padding:3px;border-radius:var(--radius-sm)}.seg{padding:8px 14px;font-size:13px;border-color:transparent;background:transparent;min-height:36px;color:var(--muted)}.seg:hover{background:transparent;color:var(--text)}.seg.active{background:var(--surface);color:var(--text);font-weight:600;box-shadow:var(--shadow-xs)}.actions-row,.month-switch,.stats,.status-dots{display:flex;align-items:center}.actions-row,.month-switch{gap:8px;flex-wrap:wrap}.calendar{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:2px}.weekday{text-align:center;color:var(--faint);font-size:11px;font-weight:600;padding:4px 0 8px}.day{border:none;background:transparent;min-height:44px;padding:6px 4px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;text-align:center;color:var(--text);font-size:14px;border-radius:var(--radius-sm);transition:background .15s,transform .15s cubic-bezier(.34,1.56,.64,1)}.day:hover{background:var(--surface-2)}.day:active{transform:scale(.94)}.day.selected{background:transparent}.day.today,.day.selected.today{box-shadow:inset 0 0 0 1.5px var(--primary)}.day span{font-weight:500;font-size:14px}.day.selected span{font-weight:600;color:var(--primary)}.dots,.status-dots{display:inline-flex;gap:4px;align-items:center}.dot{width:7px;height:7px;border-radius:999px;display:inline-block;box-shadow:none}.dot.purple{background:var(--primary)}.dot.red{background:var(--danger)}.dot.blue{background:#4f7df0}.dot.amber{background:#d98a2b}.report-table{width:100%;border-collapse:collapse;font-size:13px;white-space:nowrap}.report-table th,.report-table td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--separator)}.report-table th{color:var(--muted);font-weight:500;font-size:11px;letter-spacing:.02em}.report-table tbody tr:hover{background:var(--surface-2)}.flash{border-radius:var(--radius-md);padding:12px 14px;margin:0 0 12px;border:none;background:var(--surface-2);font-size:14px;color:var(--text)}.flash.success{color:var(--primary-strong)}.flash.error{color:var(--danger)}.flash.info{color:#3b5fc4}.stats{gap:10px;flex-wrap:wrap;margin-bottom:12px}.stat{padding:12px 14px;min-width:96px;flex:1 1 auto}.stat span{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}.stat strong{font-family:var(--font-display);font-size:22px;font-weight:700;margin:0;letter-spacing:-.01em}.empty{padding:24px 20px;border-radius:var(--radius-md);border:none;color:var(--muted);background:transparent;text-align:center;font-size:14px;margin:0}.empty-action{margin-top:12px}.sheet-backdrop{position:fixed;inset:0;z-index:40;background:#17171a59;display:flex;align-items:flex-end;justify-content:center;padding:0;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);animation:fadeIn .2s ease-out}.sheet{width:100%;max-width:480px;background:#fafafceb;-webkit-backdrop-filter:blur(24px) saturate(1.8);backdrop-filter:blur(24px) saturate(1.8);border-radius:20px 20px 0 0;box-shadow:0 -8px 32px #10101424;padding:8px 20px 20px;padding-bottom:calc(20px + var(--safe-bottom));max-height:90vh;overflow-y:auto;animation:sheetUp .42s cubic-bezier(.32,.72,0,1)}.sheet:before{content:"";display:block;width:36px;height:4px;border-radius:2px;background:var(--border-strong);margin:0 auto 14px}.sheet.sheet-full:before{display:none}@keyframes sheetUp{0%{transform:translateY(24px);opacity:.6}to{transform:translateY(0);opacity:1}}.sheet-head{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;margin-bottom:14px}.sheet-head strong{text-align:center;font-size:16px;font-weight:600}.full{width:100%}.field-hint{color:var(--muted);font-size:12px;line-height:1.4;margin-top:2px}.muted,.hint{color:var(--muted);font-size:13px;margin:0}.purchase-list{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}.purchase-pill{display:inline-flex;gap:6px;align-items:center;flex-wrap:wrap;padding:6px 12px;border-radius:999px;background:var(--surface-2);color:var(--text);font-size:12px}.purchase-pill strong{font-size:12px}.course-groups{display:flex;flex-direction:column;gap:10px}.inline-label{display:flex;flex-direction:row;align-items:center;gap:8px}.inline-label span{white-space:nowrap}.student-row .mini-card-title{flex-wrap:wrap}.student-row{border:none;background:transparent;border-radius:0;box-shadow:none;padding:14px 0;border-bottom:1px solid var(--separator)}.student-row:last-child{border-bottom:none;padding-bottom:0}.student-row:first-child{padding-top:0}.install-banner{position:fixed;left:max(16px,var(--safe-left));right:max(16px,var(--safe-right));bottom:calc(88px + var(--safe-bottom));z-index:19;background:var(--primary);color:#fff;border-radius:var(--radius-lg);padding:12px 16px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px;box-shadow:var(--shadow-lg)}.install-banner button{background:#fff;color:var(--primary);border:0;border-radius:999px;padding:8px 16px;font-weight:600;font-size:13px;min-height:36px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;border-radius:var(--radius-sm)}@media(min-width:720px){.app-shell{max-width:1200px;padding:32px 32px 130px}.grid-2{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,1fr);gap:24px;align-items:start}.stack{display:flex;flex-direction:column;gap:24px}.content{gap:24px}.tabs{left:auto;right:auto;max-width:1200px;margin:0 32px;bottom:20px;gap:8px;padding:8px;border-radius:20px}.tab{padding:10px;min-height:58px;font-size:12px}.panel{padding:24px}.calendar{gap:6px}.day{min-height:60px;padding:8px}.day span{font-size:15px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.topbar h1{font-family:var(--font-display);font-size:32px;font-weight:700}.sheet{border-radius:20px;padding:10px 24px 24px;max-width:480px}.panel-head h2{font-size:19px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}