:root{--nmc-navy:#07304d;--nmc-blue:#0b5f8a;--nmc-gold:#d7a833;--nmc-bg:#f4f7fa;--nmc-ink:#122331;--nmc-muted:#607181;--nmc-ok:#147a55;--nmc-danger:#b42336;--nmc-border:#dbe4eb;--radius:16px}*{box-sizing:border-box}body.course-app{margin:0;background:var(--nmc-bg);color:var(--nmc-ink);font-family:Inter,"Kantumruy Pro",system-ui,sans-serif}.course-topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:12px clamp(16px,4vw,56px);background:var(--nmc-navy);color:#fff;border-bottom:3px solid var(--nmc-gold)}.brand{display:flex;align-items:center;gap:12px}.brand img{width:44px;height:44px;object-fit:contain}.brand strong{display:block}.brand small{opacity:.75}.top-actions{display:flex;gap:8px}.shell{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:32px 0 64px}.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:24px;align-items:center;padding:32px;border-radius:24px;background:linear-gradient(135deg,var(--nmc-navy),var(--nmc-blue));color:#fff;box-shadow:0 18px 50px #07304d22}.hero h1{font-size:clamp(28px,4vw,48px);margin:0 0 12px;line-height:1.1}.hero p{max-width:720px;color:#e2edf4;line-height:1.7}.hero-stat{display:grid;grid-template-columns:1fr 1fr;gap:12px}.stat{padding:18px;border-radius:14px;background:#ffffff12;border:1px solid #ffffff24}.stat b{display:block;font-size:28px}.panel{margin-top:24px;padding:22px;background:#fff;border:1px solid var(--nmc-border);border-radius:var(--radius);box-shadow:0 8px 30px #20384a0c}.filters{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:12px}.field{display:flex;flex-direction:column;gap:6px}.field label{font-size:13px;font-weight:700;color:var(--nmc-muted)}input,select,textarea{width:100%;padding:12px 14px;border:1px solid #cbd8e2;border-radius:10px;background:#fff;color:var(--nmc-ink);font:inherit}input:focus,select:focus{outline:3px solid #0b5f8a22;border-color:var(--nmc-blue)}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 16px;border:0;border-radius:10px;background:var(--nmc-blue);color:#fff;text-decoration:none;font-weight:750;cursor:pointer}.button.secondary{background:#eaf1f5;color:var(--nmc-navy)}.button.gold{background:var(--nmc-gold);color:#1d2b35}.button.danger{background:var(--nmc-danger)}.button:disabled{opacity:.55;cursor:not-allowed}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:22px}.course-card{display:flex;flex-direction:column;overflow:hidden;background:#fff;border:1px solid var(--nmc-border);border-radius:var(--radius);box-shadow:0 8px 30px #20384a0c}.course-image{height:150px;display:grid;place-items:center;background:linear-gradient(140deg,#dcebf2,#f8e9bd);font-size:40px}.course-body{display:flex;flex:1;flex-direction:column;padding:18px}.badges{display:flex;flex-wrap:wrap;gap:7px}.badge{padding:5px 9px;border-radius:999px;background:#eaf1f5;color:var(--nmc-blue);font-size:11px;font-weight:800;letter-spacing:.04em}.badge.free{background:#dbf4e9;color:var(--nmc-ok)}.course-card h2{margin:14px 0 7px;font-size:19px}.course-card p{flex:1;margin:0 0 18px;color:var(--nmc-muted);line-height:1.55}.course-meta{display:flex;justify-content:space-between;gap:12px;margin-bottom:14px;font-size:13px;color:var(--nmc-muted)}.dashboard-grid{display:grid;grid-template-columns:1fr 1.7fr;gap:22px}.lesson-list{display:grid;gap:10px}.lesson{display:grid;grid-template-columns:42px 1fr auto;gap:12px;align-items:center;padding:13px;border:1px solid var(--nmc-border);border-radius:12px}.lesson-index{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:#eaf1f5;color:var(--nmc-blue);font-weight:800}.progress-track{height:9px;overflow:hidden;border-radius:999px;background:#e4ebf0}.progress-bar{height:100%;background:linear-gradient(90deg,var(--nmc-blue),#29a47a);transition:width .25s}.viewer{min-height:440px;display:grid;grid-template-rows:1fr auto;background:#17222b;border-radius:16px;overflow:hidden;color:#fff}.viewer-stage{display:grid;place-items:center;padding:28px}.viewer-stage img{max-width:100%;max-height:62vh;object-fit:contain}.viewer-controls{display:flex;align-items:center;justify-content:center;gap:12px;padding:14px;background:#0e171d}.notice{padding:14px;border-radius:10px;background:#eaf1f5;color:var(--nmc-navy)}.notice.error{background:#fde8eb;color:var(--nmc-danger)}.hidden{display:none!important}.exam-layout{display:grid;grid-template-columns:1fr 260px;gap:20px}.exam-head{display:flex;justify-content:space-between;gap:16px;align-items:center}.timer{padding:10px 15px;border-radius:999px;background:#fde8eb;color:var(--nmc-danger);font:800 18px ui-monospace,monospace}.question{padding:26px}.question h2{font-size:20px;line-height:1.55}.option{display:flex;align-items:flex-start;gap:12px;margin:10px 0;padding:14px;border:1px solid var(--nmc-border);border-radius:12px;cursor:pointer}.option:has(input:checked){border-color:var(--nmc-blue);background:#edf7fc}.navigator{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.nav-q{aspect-ratio:1;border:1px solid var(--nmc-border);border-radius:8px;background:#fff}.nav-q.answered{background:#dff4ea;border-color:#66b794}.nav-q.flagged{box-shadow:inset 0 -4px var(--nmc-gold)}.nav-q.current{outline:3px solid #0b5f8a44}.exam-actions{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:20px}.result{text-align:center;padding:44px}.result .score{font-size:52px;font-weight:900;color:var(--nmc-blue)}@media(max-width:850px){.hero,.dashboard-grid,.exam-layout{grid-template-columns:1fr}.filters{grid-template-columns:1fr 1fr}.course-grid{grid-template-columns:1fr 1fr}.exam-sidebar{order:-1}}@media(max-width:560px){.shell{width:min(100% - 20px,1180px);padding-top:18px}.brand small{display:none}.hero{padding:22px}.hero-stat{display:none}.filters,.course-grid{grid-template-columns:1fr}.course-topbar{padding:10px}.lesson{grid-template-columns:38px 1fr}.lesson .button{grid-column:1/-1}.question{padding:18px}.navigator{grid-template-columns:repeat(8,1fr)}.nav-q{font-size:11px}}