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#d8ccb8;--coral: #d9553d;--coral-dark: #b8442f;--coral-soft: #fbe9e4;--teal: #2f6f6b;--teal-soft: #e5f0ee;--blue: #3f6fb5;--gold: #b9822b;--gold-soft: #fbf1dc;--green: #4d7c3a;--radius: 20px;--radius-sm: 14px;--shadow: 0 22px 44px -32px rgba(57, 44, 30, .55);--shadow-soft: 0 10px 24px -20px rgba(57, 44, 30, .5);--font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;--font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;min-height:100vh;color:var(--ink);font-family:var(--font-sans);font-size:14px;line-height:1.65;background-color:var(--paper);background-image:linear-gradient(rgba(47,111,107,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(47,111,107,.035) 1px,transparent 1px);background-size:30px 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transparent;border-radius:999px;background:none;color:var(--ink);font-size:14px;font-weight:600;line-height:1.2;cursor:pointer;text-decoration:none;white-space:nowrap;transition:transform .16s ease,background-color .16s ease,border-color .16s ease,box-shadow .16s ease}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.btn-primary{background:var(--coral);color:#fff;box-shadow:0 12px 22px -14px #d9553de6}.btn-primary:hover{background:var(--coral-dark)}.btn-teal{background:var(--teal);color:#fff;box-shadow:0 12px 22px -14px #2f6f6bd9}.btn-teal:hover{background:#265b58}.btn-ghost{border-color:var(--line-strong);background:#fffdf899;color:var(--ink)}.btn-ghost:hover{border-color:var(--ink-3);background:var(--card)}.btn-soft{background:var(--paper-2);color:var(--ink)}.btn-soft:hover{background:var(--paper-3)}.btn-danger{background:transparent;border-color:#d9553d66;color:var(--coral)}.btn-danger:hover{background:var(--coral-soft)}.btn-sm{padding:6px 12px;font-size:13px}.btn-lg{padding:13px 26px;font-size:15px}.btn-block{width:100%}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;padding:0;border:1px solid transparent;border-radius:10px;background:transparent;color:var(--ink-2);cursor:pointer;transition:background-color .16s ease,color .16s ease}.icon-btn:hover{background:var(--paper-2);color:var(--ink)}.icon-btn.danger:hover{background:var(--coral-soft);color:var(--coral)}.field{display:flex;flex-direction:column;gap:7px}.label{font-size:13px;font-weight:600;color:var(--ink-2);letter-spacing:.02em}.input,.select,.textarea{width:100%;border:1px solid var(--line-strong);border-radius:12px;background:#fffdf9;padding:11px 13px;color:var(--ink);outline:none;transition:border-color .16s ease,box-shadow .16s ease}.textarea{min-height:90px;resize:vertical}.input::placeholder,.textarea::placeholder{color:#aab2b7}.input:focus,.select:focus,.textarea:focus{border-color:var(--teal);box-shadow:0 0 0 3px #2f6f6b1f}.select{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--ink-3) 50%),linear-gradient(135deg,var(--ink-3) 50%,transparent 50%);background-position:calc(100% - 18px) calc(50% - 2px),calc(100% - 13px) calc(50% - 2px);background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:34px}.hint{font-size:12px;color:var(--ink-3);line-height:1.5}.form-error{padding:10px 13px;border-radius:10px;background:var(--coral-soft);color:var(--coral-dark);font-size:13px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.card-pad{padding:22px}.card-flat{box-shadow:none}.card-title{font-size:17px;font-family:var(--font-serif)}.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:999px;background:var(--paper-2);color:var(--ink-2);font-size:12px;font-weight:600;line-height:1.6;white-space:nowrap}.badge-coral{background:var(--coral-soft);color:var(--coral-dark)}.badge-teal{background:var(--teal-soft);color:var(--teal)}.badge-gold{background:var(--gold-soft);color:var(--gold)}.badge-green{background:#eaf1e4;color:var(--green)}.chip{display:inline-flex;align-items:center;gap:7px;padding:7px 13px;border:1px solid var(--line-strong);border-radius:999px;background:#fffdf8cc;color:var(--ink-2);font-size:13px;cursor:pointer;transition:border-color .16s ease,background-color .16s ease,color .16s ease}.chip:hover{border-color:var(--ink-3)}.chip.active{border-color:var(--subject-color, var(--teal));background:color-mix(in srgb,var(--subject-color, var(--teal)) 12%,#fffdf8);color:var(--subject-color, var(--teal));font-weight:600}.chip-dot{width:8px;height:8px;border-radius:50%;background:var(--subject-color, var(--teal))}.segmented{display:inline-flex;padding:3px;border-radius:999px;background:var(--paper-2);gap:2px}.segmented button{padding:6px 14px;border:0;border-radius:999px;background:transparent;color:var(--ink-2);font-size:13px;font-weight:600;cursor:pointer;transition:background-color .16s ease,color .16s ease;white-space:nowrap}.segmented button.active{background:var(--card);color:var(--ink);box-shadow:0 2px 8px -4px #392c1e73}.status{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}.status:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}.status-graded{background:var(--teal-soft);color:var(--teal)}.status-pending,.status-grading{background:var(--gold-soft);color:var(--gold)}.status-grading:before{animation:pulse 1.2s ease-in-out infinite}.status-failed{background:var(--coral-soft);color:var(--coral-dark)}.empty{display:flex;flex-direction:column;align-items:center;gap:10px;padding:46px 20px;text-align:center;color:var(--ink-2)}.empty-title{font-family:var(--font-serif);font-size:16px;font-weight:700;color:var(--ink)}.skeleton{border-radius:12px;background:linear-gradient(90deg,var(--paper-2) 25%,#f6f1e8 37%,var(--paper-2) 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite}.spinner{width:18px;height:18px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .7s linear infinite}@keyframes shimmer{0%{background-position:100% 0}to{background-position:0 0}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.3}}@keyframes fade-up{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.fade-up{animation:fade-up .28s ease both}@media print{@page{size:A4;margin:16mm 14mm}body{background:#fff!important;color:#111;font-size:12pt}.app-sidebar,.app-header,.mobile-nav,.no-print{display:none!important}.app-main{padding:0!important;max-width:none!important}.print-only{display:block}.card{border:1px solid #ddd;box-shadow:none;break-inside:avoid}}@media (max-width: 960px){:root{--radius: 18px}.card-pad{padding:18px}}