:root{--bg: #f6f8fb;--surface: #ffffff;--text: #0f172a;--muted: #64748b;--border: rgba(15, 23, 42, .1);--shadow: 0 10px 30px rgba(2, 6, 23, .08);--shadow-sm: 0 6px 18px rgba(2, 6, 23, .08);--primary: #1d4ed8;--primary-2: #2563eb;--primary-soft: rgba(37, 99, 235, .12);--success: #16a34a;--danger: #ef4444;--radius: 18px;--radius-sm: 14px;--max: 1120px;--focus: 0 0 0 4px rgba(37, 99, 235, .18)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";color:var(--text);background:radial-gradient(1200px 600px at 20% 0%,rgba(37,99,235,.12),transparent 60%),radial-gradient(900px 500px at 85% 10%,rgba(2,132,199,.1),transparent 55%),var(--bg)}a{color:inherit;text-decoration:none}button,input{font:inherit}::selection{background:#2563eb2e}.container{max-width:var(--max);margin:0 auto;padding:0 20px}.page{padding:26px 0 46px}.fadeIn{animation:fadeIn .24s ease-out both}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}.topbar{position:sticky;top:0;z-index:50;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#f6f8fbb8;border-bottom:1px solid var(--border)}.topbarInner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}.brand{display:flex;align-items:center;gap:12px;cursor:pointer}.brand img{width:34px;height:34px;border-radius:10px;box-shadow:var(--shadow-sm)}.brandTitle{font-weight:800;letter-spacing:-.02em}.actions{display:flex;align-items:center;gap:10px}.btn{display:inline-flex;align-items:center;gap:10px;height:40px;padding:0 14px;border-radius:999px;border:1px solid var(--border);background:var(--surface);box-shadow:0 1px #02061705;cursor:pointer;transition:transform .14s ease,box-shadow .14s ease,border-color .14s ease,background .14s ease}.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm);border-color:#2563eb40}.btn:active{transform:translateY(0)}.btn:focus{outline:none;box-shadow:var(--shadow-sm),var(--focus)}.btnPrimary{background:linear-gradient(180deg,var(--primary-2),var(--primary));color:#fff;border-color:#2563eb66}.btnPrimary:hover{border-color:#2563eb99}.btnGhost{background:#fff9}.pill{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;border:1px solid var(--border);background:#ffffffb3;color:var(--muted);font-size:13px}.hero{border:1px solid var(--border);border-radius:28px;background:linear-gradient(180deg,#ffffffeb,#ffffffb3);box-shadow:var(--shadow);overflow:hidden}.heroInner{padding:28px;display:grid;grid-template-columns:1.2fr .8fr;gap:22px}@media (max-width: 900px){.heroInner{grid-template-columns:1fr}}.hTitle{font-size:46px;line-height:1.05;letter-spacing:-.04em;margin:0 0 12px}.hSub{margin:0 0 18px;color:var(--muted);font-size:16px;line-height:1.55}.quickGrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}@media (max-width: 520px){.quickGrid{grid-template-columns:1fr}}.cardBtn{display:flex;align-items:center;gap:12px;padding:14px;border-radius:var(--radius);border:1px solid var(--border);background:#ffffffbf;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}.cardBtn:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:#2563eb40}.cardIcon{width:38px;height:38px;border-radius:14px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);font-weight:900}.sectionTitle{margin:26px 0 12px;font-weight:800;letter-spacing:-.02em}.searchRow{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.search{position:relative;flex:1;min-width:260px}.search input{width:100%;height:44px;padding:0 44px;border-radius:999px;border:1px solid var(--border);background:#ffffffc7;outline:none;transition:box-shadow .14s ease,border-color .14s ease}.search input:focus{box-shadow:var(--focus);border-color:#2563eb59;background:#fffffff2}.search .leftIcon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted)}.search .clear{position:absolute;right:10px;top:50%;transform:translateY(-50%);width:30px;height:30px;border-radius:999px;border:none;background:transparent;color:var(--muted);cursor:pointer}.search .clear:hover{background:#0f172a0f;color:var(--text)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}@media (max-width: 980px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 640px){.grid{grid-template-columns:1fr}}.courseCard{border-radius:22px;border:1px solid var(--border);background:#ffffffd1;box-shadow:0 1px #02061705;padding:14px;display:flex;flex-direction:column;gap:10px;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}.courseCard:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:#2563eb38}.courseTop{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.courseCode{font-weight:900;letter-spacing:-.02em}.courseTitle{color:var(--text);font-weight:700;margin-top:2px}.metaRow{display:flex;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:13px}.metaChip{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:14px;border:1px solid var(--border);background:#ffffffa6}.spacer{flex:1}.toastWrap{position:fixed;right:18px;bottom:18px;z-index:100;display:flex;flex-direction:column;gap:10px}.toast{min-width:240px;max-width:360px;border-radius:18px;background:#ffffffeb;border:1px solid var(--border);box-shadow:var(--shadow);padding:12px;display:flex;align-items:flex-start;gap:10px}.toastTitle{font-weight:800}.toastBody{color:var(--muted);font-size:13px;margin-top:2px}.empty{padding:40px 14px;text-align:center;color:var(--muted);border-radius:26px;border:1px dashed rgba(15,23,42,.18);background:#ffffff8c}.small{font-size:13px;color:var(--muted)}.pillOk{border-color:#22c55e59;background:#22c55e14;color:#166534}.pillWarn{border-color:#eab30866;background:#eab3081a;color:#854d0e}.btnSmall{padding:8px 10px;font-size:12px;border-radius:10px}.calWrap{display:grid;grid-template-columns:360px 1fr;gap:16px;align-items:start}@media (max-width: 1020px){.calWrap{grid-template-columns:1fr}}.calLeft{background:var(--surface);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-sm);padding:14px}.calPanelTitle{font-weight:900;color:var(--text);margin-bottom:10px}.calCourseList{display:grid;gap:10px}.calCourseRow{display:flex;justify-content:space-between;gap:10px;padding:10px;border:1px solid var(--border);border-radius:14px;background:#02061704}.calMain{background:var(--surface);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-sm);overflow:hidden}.calHeader{display:grid;grid-template-columns:76px repeat(5,1fr);border-bottom:1px solid var(--border);background:#02061705}.calHeaderSpacer{height:46px}.calHeaderDay{height:46px;display:grid;place-items:center;font-weight:800;color:var(--text);border-left:1px solid var(--border)}.calGrid{display:grid;grid-template-columns:76px repeat(5,1fr);max-height:860px;overflow:auto}.calTimeCol{background:#02061703;border-right:1px solid var(--border)}.calTimeTick{position:relative;border-bottom:1px solid rgba(15,23,42,.06)}.calTimeTick span{position:sticky;top:0;display:inline-block;transform:translateY(-8px);padding-left:10px;font-size:12px;color:var(--muted)}.calDay{border-left:1px solid var(--border);min-width:220px}.calDayOver{background:#2563eb0f}.calDayGrid{position:relative}.calSlot{border-bottom:1px solid rgba(15,23,42,.06)}.calEvent{position:absolute;left:10px;right:10px;padding:10px;border-radius:14px;border:1px solid rgba(37,99,235,.3);background:#2563eb1a;box-shadow:0 8px 18px #0206171a;cursor:grab;-webkit-user-select:none;user-select:none}.calEvent:active{cursor:grabbing}.calEventCode{font-weight:900;color:var(--text);font-size:13px}.calEventTitle{color:var(--text);font-size:12px;margin-top:2px;line-height:1.2}.calEventMeta{color:var(--muted);font-size:11px;margin-top:4px}.calEventConflict{border-color:#ef444466;background:#ef44441f}.calEventOverlay{width:240px;pointer-events:none;opacity:.95}