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13.2vw;background:var(--nav-bg)}.site-nav-logo{display:flex;align-items:center;gap:6px;color:#fff;font-family:var(--font-logo);font-size:21px;white-space:nowrap}.site-nav-logo:hover{color:#fff;text-decoration:none}.site-nav-logo img{width:40px;height:auto;margin-top:-4px}.site-nav-buttons{display:flex;align-items:center;gap:6px;margin-left:auto}.nav-menu{display:flex;align-items:center}.nav-button{display:inline-flex;align-items:center;gap:2px;height:32px;padding:0 16px;border-radius:25px;background:var(--nav-button, #007bff);color:#fff;font-weight:700;white-space:nowrap;box-shadow:0 4px 6px #0000001a;transition:background-color .3s,transform .3s}.nav-button:hover{background:var(--nav-button-hover, #0056b3);color:#fff;text-decoration:none;transform:translateY(-2px)}.nav-quiz{--nav-button: #6f42c1;--nav-button-hover: #59359a}.nav-new-ide{--nav-button: #28a745;--nav-button-hover: #218838}.nav-caret{width:11px;height:11px;margin-left:4px;stroke-width:2;transition:transform 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24px}.nav-panel-part{margin-bottom:6px;color:var(--link);font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase}.nav-panel ol{margin:0;padding:0;list-style:none}.nav-panel ol a{display:flex;gap:6px;margin:0 -6px;padding:4px 6px;border-radius:5px;color:var(--ink);font-size:14.5px;line-height:1.35}.nav-panel ol a span{flex:none;min-width:1.6em;color:var(--muted)}.nav-panel ol a:hover,.nav-panel ol a.active{background:var(--accent-soft);color:var(--link);text-decoration:none}.nav-panel ol a.active{font-weight:600}.quiz-best{flex:none;align-self:flex-start;height:18px;margin:1px 0 0 auto;padding:0 6px;border-radius:999px;background:var(--strip);color:var(--slate);font-size:11px;font-style:normal;font-weight:700;line-height:18px}.quiz-best.is-pass{background:var(--success-soft);color:var(--success)}.nav-panel-play{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;margin-top:18px;padding:8px 10px 8px 14px;border:1px solid #e4dcfb;border-radius:10px;background:linear-gradient(90deg,#f3efff,#fdf0f6 55%,#eef8f1)}.nav-panel-play-text{flex:1 1 auto;color:#4b4f58}.nav-panel-play-new{margin-right:6px;padding:2px 7px;border-radius:999px;background:linear-gradient(90deg,#7c3aed,#db2777);color:#fff;font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.nav-panel-play-link{padding:5px 12px;border:1px solid #e3dcf5;border-radius:999px;background:#fff;color:#5b21b6;font-weight:600;transition:transform .12s ease,box-shadow .12s ease}.nav-panel-play-link:hover{text-decoration:none;transform:translateY(-1px);box-shadow:0 4px 12px #7c3aed2e}:root.dark .nav-panel{box-shadow:0 14px 30px #00000080}:root.dark .nav-panel-play{border-color:#3b3552;background:linear-gradient(90deg,#2a2540,#33263a 55%,#22322b)}:root.dark .nav-panel-play-text{color:#c9ccd3}:root.dark .nav-panel-play-link{border-color:#4a4266;background:var(--surface);color:#c4b5fd}@media(max-width:1199px){.nav-panel-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:1100px){.site-nav{padding:0 20px}}@media(max-width:760px){.nav-new-ide{display:none}}@media(max-width:520px){.nav-button-text{display:none}.nav-button{padding:0 12px}.site-nav{padding:0 10px}}@media(max-width:340px){.site-nav-logo span{display:none}}.site-footer{margin-top:32px;padding-bottom:120px;border-top:1px solid var(--line);color:var(--slate);font-size:15px}.site-footer-inner{display:grid;grid-template-columns:minmax(180px,1.4fr) repeat(3,minmax(0,1fr));gap:24px 32px;max-width:1480px;margin:0 auto;padding:28px 20px 20px}.site-footer a{color:var(--slate)}.site-footer a:hover{color:var(--accent);text-decoration:none}.site-footer .site-footer-logo{display:inline-flex;align-items:center;gap:8px;color:var(--ink);font-size:17px;font-weight:700}.site-footer-brand p{margin:6px 0 0}.site-footer-group{display:flex;flex-direction:column;align-items:flex-start;gap:8px}.site-footer-group h2{margin:0 0 2px;color:var(--ink);font-size:14px;line-height:1.4}.site-footer-copy{display:flex;justify-content:space-between;gap:12px;max-width:1480px;margin:0 auto;padding:14px 20px 22px;border-top:1px solid var(--line);font-size:13px}.site-footer-link{padding:0;border:0;background:none;color:var(--slate);text-align:left}.site-footer-link:hover{color:var(--accent)}#pmLink{visibility:hidden;padding:0;border:0;background:none;color:var(--slate);font-size:13px;text-decoration:none}#pmLink:hover{color:var(--accent)}@media(max-width:899px){.site-footer-inner{grid-template-columns:repeat(3,minmax(0,1fr))}.site-footer-brand{grid-column:1 / -1}}@media(max-width:559px){.site-footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}}.feedback-dialog[data-state=done] .feedback-when-form,.feedback-dialog[data-state=form] .feedback-when-done{display:none}.feedback-dialog .field{margin-top:14px}.feedback-stars{display:flex;width:max-content}.feedback-star{position:relative;padding:2px 6px 2px 0;color:var(--control-border);cursor:pointer}.feedback-star .ic{width:26px;height:26px}.feedback-star:has(input:checked),.feedback-star:has(~.feedback-star input:checked),.feedback-stars:hover .feedback-star{color:#f5a623}.feedback-stars:hover .feedback-star:hover~.feedback-star{color:var(--control-border)}.feedback-star input{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}.feedback-star input:focus-visible+.ic{border-radius:4px;outline:2px solid var(--accent);outline-offset:2px}.doc-page{max-width:1000px;margin:0 auto;padding:0 12px}.doc{margin:20px 0;padding:8px 24px 16px;border-radius:15px;background:var(--surface);box-shadow:var(--card-shadow)}.doc h1{margin:16px 0 20px;font-size:32px;text-align:center}.doc h2{margin-top:28px;font-size:22px}.doc h3{margin-top:20px;font-size:18px}.doc p,.doc li{font-size:16px;line-height:1.625}.doc li+li{margin-top:4px}.doc-updated{margin-bottom:30px;color:var(--slate);font-weight:700;text-align:center}.doc-note{color:var(--slate);font-weight:700}.error-page{max-width:640px;margin:48px auto 0;padding:0 16px}.error-page h1{margin:12px 0 8px;font-size:32px}.error-badge{display:inline-block;padding:2px 10px;border-radius:999px;background:var(--danger-soft);color:var(--danger);font-size:13px;font-weight:700}.error-lead{color:var(--slate);font-size:17px}.error-term{margin:20px 0;padding:14px 16px;overflow-x:auto;border-radius:var(--radius);background:#1e1e1e;color:#d4d4d4;font-size:13px;line-height:1.6}.error-term-last{color:#f48771}.error-actions{display:flex;flex-wrap:wrap;gap:10px}