:root{--bg:#0b0f14;--surface:#111827;--surface-soft:#161e2e;--border:#1f2937;--text-main:#e5e7eb;--text-muted:#9ca3af;--primary:#3b82f6;--primary-soft:#2563eb}:root[data-theme=light]{--bg:#f9fafb;--surface:#fff;--surface-soft:#f3f4f6;--border:#e5e7eb;--text-main:#111827;--text-muted:#4b5563;--primary:#2563eb;--primary-soft:#1d4ed8}*{box-sizing:border-box}body{background:var(--bg);color:var(--text-main);margin:0;padding-top:4.25rem;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.6}section{padding:4rem 1.5rem}.container{max-width:1000px;margin:0 auto}h1,h2,h3,h4{margin:0 0 1rem;line-height:1.2}h1{font-size:clamp(2.2rem,4vw,3.2rem)}h2{color:var(--text-muted);font-size:clamp(1.4rem,2.5vw,1.8rem)}h3{font-size:1.8rem}p{color:var(--text-muted);max-width:70ch}.btn{background:var(--primary);color:#fff;border-radius:8px;align-items:center;gap:.5rem;padding:.75rem 1.4rem;font-weight:500;text-decoration:none;transition:background .2s;display:inline-flex}.btn:hover{background:var(--primary-soft)}.card{background:linear-gradient(180deg, var(--surface), var(--surface-soft));border:1px solid var(--border);border-radius:14px;padding:1.5rem}.grid{gap:1.5rem;display:grid}@media (min-width:768px){.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}}.header-tools{background:color-mix(in srgb, var(--surface) 85%, transparent);border:1px solid var(--border);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:100;border-radius:999px;align-items:center;gap:.35rem;padding:.35rem .45rem;display:flex;position:fixed;top:.75rem;right:.75rem}.language-switcher{gap:.25rem;display:flex}.language-switcher button{color:var(--text-main);cursor:pointer;background:0 0;border:none;border-radius:999px;align-items:center;gap:.25rem;padding:.35rem;font-size:.8rem;display:flex}.language-switcher button:hover{background:var(--surface-soft)}.language-switcher button:disabled{opacity:.6;cursor:default}.language-switcher .flag{font-size:1rem}.language-switcher .label{display:none}.theme-toggle{color:var(--text-main);cursor:pointer;background:0 0;border:none;border-radius:999px;padding:.35rem;font-size:1rem}.theme-toggle:hover{background:var(--surface-soft)}@media (min-width:768px){body{padding-top:3.5rem}.header-tools{gap:.6rem;padding:.4rem .6rem;top:1.5rem;right:1.5rem}.language-switcher .label{font-size:.75rem;display:inline}.language-switcher button{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:.35rem .55rem}.language-switcher button:hover,.theme-toggle:hover{border-color:var(--primary)}.theme-toggle{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:.45rem .6rem}}.timeline{border-left:2px solid var(--border);margin:2rem 0 0;padding:0;list-style:none}.timeline li{margin-bottom:2.5rem;padding-left:2rem;position:relative}.timeline li:before{content:"";background:var(--primary);border-radius:50%;width:12px;height:12px;position:absolute;top:6px;left:-7px}.period{color:var(--text-muted);font-size:.85rem}footer{border-top:1px solid var(--border);text-align:center;color:var(--text-muted);padding:2rem 1.5rem}