:root{
  --bg:#faf6ee;--panel:#fff;--ink:#2b2420;--muted:#6b6055;--accent:#8a1f2d;--accent-soft:#f5e6e2;--gold:#b8860b;--line:#e6dcc9;--shadow:0 8px 28px rgba(60,40,20,.08);--radius:18px;
  --font:-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo','Segoe UI','Malgun Gothic',Roboto,'Helvetica Neue',system-ui,sans-serif;
}
:root[data-theme="dark"]{--bg:#0c1220;--panel:#141d33;--ink:#eaf0fb;--muted:#93a3c4;--accent:#6d8ee0;--accent-soft:#1c2846;--gold:#d9a441;--line:#263356;--shadow:0 10px 30px rgba(0,0,0,.35)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.6}.hidden{display:none!important}
button,input{font:inherit}.topbar{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--panel) 94%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.topbar-inner{max-width:1180px;margin:auto;height:68px;padding:0 22px;display:flex;align-items:center;gap:14px}.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand-mark{width:34px;height:34px;border-radius:11px;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800}.brand-text b{display:block;font-size:15px}.brand-text span{display:block;font-size:11px;color:var(--muted)}.top-actions{margin-left:auto;display:flex;gap:8px}.icon-btn{border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:10px;padding:8px 11px;cursor:pointer}.layout{max-width:1180px;margin:0 auto;padding:26px 22px 56px;display:grid;grid-template-columns:270px minmax(0,1fr);gap:28px}.sidebar{position:sticky;top:94px;align-self:start;max-height:calc(100vh - 116px);overflow:auto;padding-right:4px}.search-wrap{position:relative}.search-wrap input{width:100%;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:12px;padding:11px 12px 11px 38px;outline:none}.search-wrap span{position:absolute;left:13px;top:10px;color:var(--muted)}.progress-card{margin:14px 0;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px}.progress-line{height:7px;background:var(--accent-soft);border-radius:99px;overflow:hidden;margin-top:8px}.progress-line i{display:block;height:100%;background:var(--accent);width:0}.progress-meta{display:flex;justify-content:space-between;gap:8px;font-size:12px;color:var(--muted)}.nav-group{margin-top:18px}.nav-group-title{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:800;margin:0 8px 6px}.nav-btn{width:100%;border:0;background:transparent;color:var(--ink);text-align:left;padding:9px 10px;border-radius:10px;display:flex;align-items:center;gap:9px;cursor:pointer}.nav-btn:hover{background:var(--accent-soft)}.nav-btn.active{background:var(--accent-soft);color:var(--accent);font-weight:800}.nav-no{font-size:11px;color:var(--muted);width:24px}.nav-btn.done .nav-no{color:var(--accent);font-weight:800}.nav-btn.done .nav-no::after{content:'✓';margin-left:2px}.content{min-width:0}.hero{background:linear-gradient(135deg,var(--accent),#5c1420);color:#fff;border-radius:24px;padding:30px;box-shadow:var(--shadow)}:root[data-theme="dark"] .hero{background:linear-gradient(135deg,#3858a8,#111a32)}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.12em;opacity:.8}.hero h1{font-size:clamp(28px,5vw,46px);line-height:1.15;margin:8px 0 10px}.hero p{margin:0;max-width:720px;opacity:.92}.quick-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:18px 0 0}.quick-step{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:12px;font-size:12px}.quick-step b{font-size:16px;display:block;margin-bottom:4px}.section-head{margin:32px 0 14px;display:flex;align-items:end;justify-content:space-between;gap:16px}.section-head h2{margin:0;font-size:22px}.section-head p{margin:0;color:var(--muted);font-size:13px}.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.topic-card{border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:16px;padding:17px;text-align:left;cursor:pointer;box-shadow:0 2px 12px rgba(0,0,0,.02)}.topic-card:hover{transform:translateY(-1px);box-shadow:var(--shadow)}.topic-card .tag{font-size:11px;color:var(--accent);font-weight:800}.topic-card h3{margin:4px 0 5px;font-size:17px}.topic-card p{margin:0;color:var(--muted);font-size:13px}.topic-card.done{outline:2px solid color-mix(in srgb,var(--accent) 28%,transparent)}.topic-card.done h3::after{content:'  ✓';color:var(--accent)}
.topic-page{animation:fade .18s ease}.topic-header{display:flex;align-items:start;gap:12px;margin-bottom:18px}.topic-kicker{font-size:12px;color:var(--accent);font-weight:800;letter-spacing:.08em}.topic-header h1{font-size:30px;margin:3px 0 4px;line-height:1.2}.topic-header p{margin:0;color:var(--muted)}.topic-body{display:grid;grid-template-columns:minmax(300px,430px) minmax(0,1fr);gap:26px;align-items:start}.screen-card{background:#f4f0e9;border:1px solid var(--line);border-radius:22px;padding:16px;position:sticky;top:96px}:root[data-theme="dark"] .screen-card{background:#101829}.screen-card img{width:100%;height:auto;display:block;border-radius:14px}.screen-caption{font-size:11px;color:var(--muted);text-align:center;margin-top:10px}.explain-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:0 18px}.explain-row{display:grid;grid-template-columns:38px 1fr;gap:12px;padding:16px 0;border-bottom:1px solid var(--line)}.explain-row:last-child{border-bottom:0}.num{width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800}.explain-row h3{font-size:15px;margin:0 0 3px}.explain-row p{font-size:13px;color:var(--muted);margin:0}.learn-card{margin-top:16px;border-left:4px solid var(--gold);background:color-mix(in srgb,var(--accent-soft) 52%,var(--panel));border-radius:14px;padding:15px 16px}.learn-card b{display:block;margin-bottom:4px}.learn-card p{margin:0;font-size:13px;color:var(--muted)}.complete-row{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-top:16px;padding:14px 15px;border:1px solid var(--line);background:var(--panel);border-radius:14px}.complete-row span{font-size:13px;color:var(--muted)}.complete-btn{border:0;border-radius:10px;background:var(--accent);color:#fff;font-weight:800;padding:10px 14px;cursor:pointer}.complete-btn.done{background:var(--accent-soft);color:var(--accent);border:1px solid var(--accent)}.pager{display:flex;justify-content:space-between;gap:12px;margin-top:26px}.pager button{flex:1;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:14px;padding:13px;cursor:pointer}.pager button:last-child{text-align:right}.mobile-select{display:none}.footer{max-width:1180px;margin:0 auto;padding:22px;color:var(--muted);font-size:12px;text-align:center;border-top:1px solid var(--line)}.empty{padding:18px;color:var(--muted);font-size:13px}.print-note{font-size:11px;color:var(--muted);margin-top:10px}@keyframes fade{from{opacity:.3;transform:translateY(4px)}to{opacity:1;transform:none}}
@media(max-width:900px){.layout{grid-template-columns:1fr;padding:18px 14px 40px}.sidebar{display:none}.mobile-select{display:block;margin-bottom:14px}.mobile-select select{width:100%;padding:11px 12px;border-radius:12px;border:1px solid var(--line);background:var(--panel);color:var(--ink)}.quick-grid{grid-template-columns:1fr}.topic-grid{grid-template-columns:1fr}.topic-body{grid-template-columns:1fr}.screen-card{position:static;max-width:520px;margin:auto}.topic-header h1{font-size:26px}.topbar-inner{padding:0 14px}.brand-text span{display:none}}
@media(max-width:520px){.hero{padding:22px;border-radius:18px}.top-actions .print-label{display:none}.topic-body{gap:16px}.explain-card{padding:0 14px}.complete-row{align-items:flex-start;flex-direction:column}.complete-btn{width:100%}.pager{flex-direction:column}.pager button{text-align:left!important}}
@media print{.topbar,.sidebar,.mobile-select,.complete-row,.pager,.footer{display:none!important}.layout{display:block;max-width:none;padding:0}.topic-page{display:block!important}.screen-card{position:static;break-inside:avoid}.topic-body{grid-template-columns:42% 1fr}.content{max-width:none}.hero{color:#000;background:#fff;border:1px solid #ccc;box-shadow:none}.topic-page{page-break-before:always}.topic-page:first-child{page-break-before:auto}}

/* ORATIO 본체 복귀 링크 — 설명서는 독립 폴더이므로 앱 핵심 JS에 의존하지 않는다. */
.manual-back{display:inline-flex;align-items:center;gap:4px;text-decoration:none;color:var(--ink);font-size:13px;font-weight:800;white-space:nowrap;padding:7px 9px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}
.manual-back:hover{border-color:var(--accent);color:var(--accent)}
@media(max-width:640px){.manual-back span{display:none}.manual-back{padding:7px 10px}}