*{box-sizing:border-box}:root{color-scheme:light;--bg: #f9fafb;--surface: #ffffff;--surface-2: #f9fafb;--surface-3: #f3f4f6;--border: #e5e7eb;--border-strong: #d1d5db;--text-primary: #0f172a;--text-secondary: #1f2937;--text-muted: #475569;--text-subtle: #6b7280;--accent: #3b82f6;--accent-strong: #2563eb;--accent-soft: #e5edff;--success: #059669;--danger: #dc2626;--shadow-soft: 0 1px 3px rgba(0, 0, 0, .1)}[data-theme=dark]{color-scheme:dark;--bg: #0b1220;--surface: #0f172a;--surface-2: #111827;--surface-3: #162033;--border: #1f2937;--border-strong: #273449;--text-primary: #e5e7eb;--text-secondary: #cbd5e1;--text-muted: #c0d0e0;--text-subtle: #94a3b8;--accent: #60a5fa;--accent-strong: #3b82f6;--accent-soft: rgba(96, 165, 250, .12);--success: #34d399;--danger: #f87171;--shadow-soft: 0 10px 30px rgba(0, 0, 0, .35)}html,body{margin:0;padding:0;width:100%;height:100%;background:var(--bg)}body{font-family:Gordita,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;color:var(--text-primary);line-height:1.5;transition:background-color .25s ease,color .25s ease}a{color:inherit;text-decoration:none}main{margin:0;min-height:100vh}h1{color:var(--text-primary);text-transform:uppercase;font-size:clamp(2.4rem,4vw,4rem);font-weight:700;letter-spacing:-.01em;line-height:1.1;margin:2.5rem auto 2rem;max-width:18rem}p{max-width:32rem;margin:1.5rem auto;line-height:1.6;color:var(--text-muted)}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.top-bar{background:transparent;border-bottom:none;position:sticky;top:0;z-index:10;padding:.35rem 0;box-shadow:none;display:flex;justify-content:center;align-items:center}.top-bar-inner{display:flex;align-items:center;justify-content:space-between;gap:.75rem;flex-wrap:wrap;padding:.75rem .5rem;background:transparent;border:none;border-radius:0;box-shadow:none}.tab-nav{display:flex;gap:.35rem;flex-wrap:wrap;align-items:center;padding:.1rem;background:transparent;border:none;border-radius:0;box-shadow:none}.tab-button{background:none;border:1px solid var(--border);padding:.5rem .9rem;border-radius:6px;cursor:pointer;color:var(--text-muted);font-weight:700;letter-spacing:.01em;transition:all .18s ease;min-width:104px}.tab-button:hover,.tab-button:focus-visible{color:var(--text-primary);border-color:var(--border-strong);outline:none;background:var(--accent-soft);box-shadow:none}.tab-button.active{color:var(--text-primary);background:var(--accent-soft);border-color:var(--accent);box-shadow:none}.sub-nav{display:flex;gap:.75rem;flex-wrap:wrap;align-items:center;padding:.75rem 0}.sub-nav a{color:var(--text-primary);font-weight:600}.sub-nav span{color:var(--text-subtle);font-size:.95rem}.theme-toggle{display:inline-flex;align-items:center;padding:.45rem .7rem;background:var(--surface);color:var(--text-secondary);border:1px solid var(--border);border-radius:6px;cursor:pointer;transition:background-color .2s ease,border-color .2s ease,transform .12s ease}.theme-toggle:hover{background:var(--surface-2);border-color:var(--border-strong);transform:translateY(-1px)}.theme-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.theme-toggle__icon{display:inline-flex;align-items:center;justify-content:center;width:1.25rem;height:1.25rem}@media(max-width:640px){.top-bar-inner{justify-content:center;padding:.65rem 0}.tab-nav{justify-content:center}h1{margin:2rem auto 1.25rem}}@media(max-width:980px)and (min-width:641px){.top-bar{padding-left:1rem;padding-right:.75rem}.top-bar-inner{margin-left:.4rem}}@media(max-width:1024px){.container{padding:0 1.25rem}}@media(max-width:820px){.container{padding:0 1.5rem}}