:root {
  --bg: #f6f4ef;
  --surface: #ffffff;
  --surface-soft: #faf9f6;
  --ink: #1f2933;
  --ink-muted: #6b7280;
  --ink-faint: #9aa3af;
  --border: #e7e2d9;
  --border-strong: #d6d0c4;
  --accent: #3d6b5a;
  --accent-hover: #345c4d;
  --accent-soft: #e8f1ed;
  --danger: #b42318;
  --danger-soft: #fef3f2;
  --shadow: 0 1px 2px rgba(31,41,51,.04), 0 8px 24px rgba(31,41,51,.06);
  --radius: 14px;
  --sidebar-w: 232px;
  --reading: 44rem;
  --font: "Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --mono: ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
html[data-theme="dark"] {
  --bg: #161b18; --surface: #1e2621; --surface-soft: #232c27;
  --ink: #e8eee9; --ink-muted: #a3b0a8; --ink-faint: #7a877f;
  --border: #2d3832; --border-strong: #3d4a43;
  --accent: #7cb59a; --accent-hover: #93c7ad; --accent-soft: #24332c;
  --danger: #f0a8a0; --danger-soft: #3a2422;
  --shadow: 0 1px 2px rgba(0,0,0,.25), 0 10px 28px rgba(0,0,0,.28);
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
body{background-image:radial-gradient(ellipse 80% 50% at 10% -10%,rgba(61,107,90,.08),transparent),radial-gradient(ellipse 60% 40% at 100% 0%,rgba(180,140,90,.06),transparent)}
html[data-theme="dark"] body{background-image:radial-gradient(ellipse 70% 45% at 8% -8%,rgba(124,181,154,.08),transparent),radial-gradient(ellipse 50% 35% at 100% 0%,rgba(80,90,70,.08),transparent)}
.hidden,[hidden]{display:none!important}
a{color:var(--accent)} a:hover{color:var(--accent-hover)}
.site-shell{display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);min-height:100vh}
.site-sidebar{position:sticky;top:0;align-self:start;height:100vh;padding:20px 14px 18px;border-right:1px solid var(--border);background:color-mix(in srgb,var(--surface) 88%,var(--bg));backdrop-filter:blur(10px);display:flex;flex-direction:column;gap:18px;z-index:30}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:4px 8px;text-decoration:none;color:inherit}
.sidebar-brand-mark{width:34px;height:34px;border-radius:10px;flex:none;background:linear-gradient(145deg,var(--accent),#5f8f78);color:#fff;display:grid;place-items:center;font-weight:800;font-size:.95rem;box-shadow:var(--shadow)}
.sidebar-brand-text{display:flex;flex-direction:column;gap:1px;min-width:0}
.sidebar-brand-title{font-weight:750;font-size:.98rem;letter-spacing:-.01em}
.sidebar-brand-sub{font-size:.72rem;color:var(--ink-muted)}
.sidebar-nav{display:flex;flex-direction:column;gap:4px}
.sidebar-link{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--ink-muted);text-decoration:none;font-weight:600;font-size:.94rem}
.sidebar-link:hover,.sidebar-link.is-active{background:var(--accent-soft);color:var(--accent)}
.sidebar-ico{width:1.25rem;text-align:center;opacity:.9;font-size:.95rem}
.sidebar-section{margin-top:4px}
.sidebar-section-label{margin:0 0 6px 8px;font-size:.72rem;font-weight:700;letter-spacing:.04em;color:var(--ink-faint);text-transform:uppercase}
.sidebar-footer{margin-top:auto;display:flex;flex-direction:column;gap:8px;padding:0 4px}
.theme-toggle{display:flex;align-items:center;justify-content:center;gap:8px;padding:8px 10px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--ink-muted);font:inherit;font-size:.85rem;font-weight:600;cursor:pointer}
.theme-toggle:hover{color:var(--accent);border-color:var(--border-strong)}
.sidebar-toggle{display:none;position:fixed;top:12px;left:12px;z-index:45;width:42px;height:42px;border-radius:12px;border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);font-size:1.1rem;cursor:pointer;color:var(--ink)}
.sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(20,28,24,.35);z-index:25}
.site-main{min-width:0;padding:22px 28px 56px}
.site-main-inner{max-width:var(--reading);margin:0 auto}
.site-main-inner.wide{max-width:min(960px,100%)}
.site-main-inner.full{max-width:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 14px;border-radius:10px;border:1px solid transparent;font:inherit;font-weight:650;font-size:.92rem;cursor:pointer;text-decoration:none;transition:background .15s,color .15s,border-color .15s}
.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover);color:#fff}
.btn-ghost{background:transparent;color:var(--ink-muted);border-color:var(--border)}.btn-ghost:hover{color:var(--accent);border-color:var(--border-strong);background:var(--surface)}
.btn-danger{background:var(--danger);color:#fff}.btn-danger-ghost{background:transparent;color:var(--danger);border-color:transparent}.btn-danger-ghost:hover{background:var(--danger-soft)}
.btn-toggle{background:transparent;color:var(--ink-muted);border:0;padding:6px 10px;border-radius:8px;font-weight:650;font-size:.85rem;cursor:pointer;font:inherit}
.btn-toggle.is-active{background:var(--surface);color:var(--accent);box-shadow:var(--shadow)}
.btn-icon{font-size:1.1rem;line-height:1}
.page-kicker{margin:0 0 6px;color:var(--accent);font-size:.78rem;font-weight:750;letter-spacing:.04em}
.page-title,.app-title{margin:0;font-size:1.75rem;font-weight:780;letter-spacing:-.02em;line-height:1.25}
.page-lead{margin:10px 0 0;color:var(--ink-muted);font-size:.98rem;max-width:40rem}
.search-hint{color:var(--ink-muted);font-size:.92rem}
.pill{display:inline-flex;align-items:center;padding:2px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:.72rem;font-weight:700}
.pill-muted{background:var(--surface-soft);color:var(--ink-muted);border:1px solid var(--border)}
.note-card,.report-card,.wb-card{display:block;width:100%;text-align:left;text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px;cursor:pointer;font:inherit;transition:border-color .15s,transform .15s}
.note-card:hover,.report-card:hover,.wb-card:hover{border-color:var(--border-strong);transform:translateY(-1px)}
.note-card-title,.wb-card-title{margin:0 0 6px;font-size:1.05rem;font-weight:720;letter-spacing:-.01em}
.note-card-preview{margin:0;color:var(--ink-muted);font-size:.9rem;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.note-card-time{margin:10px 0 0;color:var(--ink-faint);font-size:.8rem}
.report-card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.report-badge{flex:none;padding:2px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:.72rem;font-weight:700}
.report-card-range{margin:4px 0 8px;color:var(--ink-muted);font-size:.86rem;font-weight:600}
.wb-hero{margin:4px 0 28px}
.wb-grid{display:grid;grid-template-columns:1.35fr .9fr;gap:28px;align-items:start}
.wb-section-title{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:0 0 14px;font-size:1.05rem;font-weight:750}
.wb-section-title a{color:var(--accent);text-decoration:none;font-size:.88rem;font-weight:650}
.wb-section-title a:hover{text-decoration:underline}
.wb-reports,.wb-tools{display:flex;flex-direction:column;gap:12px}
.wb-tool .wb-tool-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.wb-card.wb-tool{cursor:default}.wb-card.wb-tool:hover{transform:none}
.notes-toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin:8px 0 16px}
.notes-list{display:flex;flex-direction:column;gap:10px}
.editor-topbar{margin-bottom:12px}
.editor-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.mode-toggle{display:inline-flex;gap:2px;padding:3px;border-radius:10px;background:var(--surface-soft);border:1px solid var(--border)}
.editor{max-width:100%}
.note-title{width:100%;border:0;background:transparent;font:inherit;font-size:1.55rem;font-weight:750;letter-spacing:-.02em;color:var(--ink);padding:4px 0 12px;outline:none;border-bottom:1px solid var(--border);margin-bottom:14px}
.editor-panes{display:grid;gap:14px;min-height:55vh}
.editor-panes.mode-split{grid-template-columns:1fr 1fr}
.editor-panes.mode-edit .pane-preview{display:none}
.editor-panes.mode-preview .pane-edit{display:none}
.pane{display:flex;flex-direction:column;min-height:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.pane-label{padding:8px 14px;font-size:.75rem;font-weight:700;letter-spacing:.04em;color:var(--ink-faint);border-bottom:1px solid var(--border);background:var(--surface-soft)}
.note-body{flex:1;width:100%;min-height:50vh;border:0;resize:vertical;padding:14px 16px;font-family:var(--mono);font-size:.92rem;line-height:1.65;background:transparent;color:var(--ink);outline:none}
.note-preview{flex:1;min-height:50vh;padding:14px 18px 24px;overflow:auto}
.editor-meta{margin:10px 0 0;color:var(--ink-faint);font-size:.82rem}
.preview-empty{color:var(--ink-faint);margin:0}
.search-wrap{margin:0 0 16px}
.search-input{width:100%;max-width:28rem;padding:10px 14px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--ink);font:inherit;font-size:.95rem}
.search-input:focus{outline:2px solid color-mix(in srgb,var(--accent) 35%,transparent);border-color:var(--accent)}
.empty-state{text-align:center;padding:36px 18px;border:1px dashed var(--border-strong);border-radius:var(--radius);background:var(--surface-soft);color:var(--ink-muted)}
.empty-state h2{margin:8px 0;color:var(--ink);font-size:1.15rem}
.empty-icon{font-size:2rem}
.md-preview h1,.md-preview h2,.md-preview h3{line-height:1.3;letter-spacing:-.01em}
.md-preview h1{font-size:1.45rem}.md-preview h2{font-size:1.22rem;margin-top:1.4em}.md-preview h3{font-size:1.05rem}
.md-preview p,.md-preview li{line-height:1.7}
.md-preview code{font-family:var(--mono);font-size:.88em;background:var(--surface-soft);border:1px solid var(--border);border-radius:6px;padding:.1em .35em}
.md-preview pre{background:var(--surface-soft);border:1px solid var(--border);border-radius:10px;padding:12px 14px;overflow-x:auto}
.md-preview pre code{border:0;background:transparent;padding:0}
.md-preview blockquote{margin:1em 0;padding:.2em 0 .2em 1em;border-left:3px solid var(--accent);color:var(--ink-muted)}
.md-preview .katex{font-size:1.05em}.md-preview .katex-display{overflow:visible;margin:.9em 0;padding:.75em 0;line-height:normal}
.overlay{position:fixed;inset:0;z-index:100;background:rgba(20,28,24,.4);display:grid;place-items:center;padding:16px}
.dialog{width:min(400px,100%);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px 20px}
.dialog-title{margin:0 0 8px;font-size:1.15rem}.dialog-text{margin:0;color:var(--ink-muted)}
.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:18px}
.topbar{margin-bottom:8px}.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.reports-nav,.courses-nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.95rem;color:var(--ink-muted)}
.reports-nav a,.courses-nav a{color:var(--accent);text-decoration:none;font-weight:600}
.reports-nav a:hover,.courses-nav a:hover{text-decoration:underline}
.nav-sep{color:var(--ink-faint)}.nav-current{color:var(--ink);font-weight:650}
.view{animation:fadeIn .2s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
@media (max-width:960px){.wb-grid{grid-template-columns:1fr}.editor-panes.mode-split{grid-template-columns:1fr}.editor-panes.mode-split .pane-preview{min-height:40vh}}
@media (max-width:860px){.site-shell{grid-template-columns:1fr}.sidebar-toggle{display:grid;place-items:center}.site-sidebar{position:fixed;left:0;top:0;width:min(280px,86vw);transform:translateX(-105%);transition:transform .2s ease;box-shadow:var(--shadow)}body.sidebar-open .site-sidebar{transform:translateX(0)}body.sidebar-open .sidebar-backdrop{display:block}.site-main{padding:64px 16px 48px}}

/* aliases for course/report templates */
.shell{display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);min-height:100vh}
.sidebar{position:sticky;top:0;align-self:start;height:100vh;padding:20px 14px 18px;border-right:1px solid var(--border);background:color-mix(in srgb,var(--surface) 88%,var(--bg));backdrop-filter:blur(10px);display:flex;flex-direction:column;gap:18px;z-index:30}
.main,.shell-main{min-width:0;padding:22px 28px 56px}
.mobile-bar{display:none}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--ink-muted);text-decoration:none;font-weight:600;font-size:.94rem;border:0;background:transparent;width:100%;text-align:left;font:inherit;cursor:pointer}
.nav-item:hover,.nav-item.is-active{background:var(--accent-soft);color:var(--accent)}
.nav-icon{width:1.25rem;text-align:center}
.sidebar-brand .sidebar-logo,.sidebar-logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(145deg,var(--accent),#5f8f78);color:#fff;display:grid;place-items:center;font-weight:800;box-shadow:var(--shadow)}
.sidebar-courses-label{margin:0 0 6px 8px;font-size:.72rem;font-weight:700;letter-spacing:.04em;color:var(--ink-faint);text-transform:uppercase}
.course-links{display:flex;flex-direction:column;gap:2px}
.course-link{display:block;padding:8px 12px;border-radius:8px;color:var(--ink-muted);text-decoration:none;font-size:.86rem;font-weight:600}
.course-link:hover{background:var(--accent-soft);color:var(--accent)}
.course-link small{display:block;font-weight:500;color:var(--ink-faint);font-size:.74rem;margin-top:2px}
.reports-section{margin-bottom:36px}
.section-title{margin:0 0 14px;font-size:1.05rem;font-weight:700}
.reports-list{display:flex;flex-direction:column;gap:12px}
.report-meta-row{display:flex;flex-wrap:wrap;gap:8px 14px;margin:8px 0 0;color:var(--ink-muted);font-size:.86rem}
.report-meta-row strong{color:var(--ink);font-weight:700}
.report-kicker{margin:0 0 6px;color:var(--accent);font-size:.8rem;font-weight:700}
.reports-hero{margin:8px 0 28px}
.reports-lead{margin:10px 0 0;color:var(--ink-muted);font-size:.98rem;line-height:1.6}
.report-main{padding-bottom:40px}
.report-article,.lecture-article{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px 26px 36px}
.report-header,.lecture-header{margin-bottom:22px;padding-bottom:18px;border-bottom:1px solid var(--border)}
.report-title,.lecture-title{margin:0 0 10px;font-size:1.65rem;font-weight:750;letter-spacing:-.02em;line-height:1.3}
.report-period{margin:0 0 6px;color:var(--ink-muted);font-size:.95rem}
.report-date{margin:0;color:var(--ink-faint);font-size:.85rem}
.report-body,.lecture-body{font-size:1.02rem;line-height:1.75}
.report-body h1{display:none}
.report-footer{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.card-grid{display:grid;gap:12px}
.card-grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.lecture-card{display:block;text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px}
.lecture-card:hover{border-color:var(--border-strong)}
.lecture-card-title{margin:0 0 6px;font-size:1.05rem;font-weight:720}
.lecture-card-meta{margin:0;color:var(--ink-muted);font-size:.86rem}
.courses-app,.reports-app{max-width:var(--reading)}
@media (max-width:860px){.shell{grid-template-columns:1fr}.sidebar{position:fixed;left:0;top:0;width:min(280px,86vw)}.mobile-bar{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--border)}.main,.shell-main{padding:16px 16px 48px}.card-grid.cols-2{grid-template-columns:1fr}}

.site-main-inner.notes-wide{max-width:min(1100px,100%)}
.controls-card{margin-top:10px;padding:14px 16px 16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}
.controls-hint{margin:0;color:var(--ink-muted);font-size:.9rem;font-weight:600}
.controls-card .search-wrap{margin-top:12px}
.controls-card .search-input{max-width:none;background:var(--surface-soft)}
.search-box{margin:18px 0 22px}
.search-results{display:flex;flex-direction:column;gap:10px}

/* katex-uncrop-global */
.md-preview .katex-display,.lecture-body .katex-display,.report-body .katex-display{overflow:visible!important;overflow-x:visible!important;overflow-y:visible!important;padding-top:.9em;padding-bottom:.55em;line-height:normal}