:root{--bg: #ffffff;--text: #111827;--muted: #6b7280;--accent: #0ea5e9;--card: #f5f7fa;--border: #e5e7eb;--header-h: 64px;--header-bg-from: color-mix(in lab, var(--bg) 96%, var(--accent) 4%);--header-bg-to: var(--bg)}:root[data-theme=dark]{--bg: #0b0f14;--text: #e5e7eb;--muted: #9ca3af;--accent: #22d3ee;--card: #111827;--border: #1f2937;--header-bg-from: color-mix(in lab, var(--bg) 94%, var(--accent) 6%);--header-bg-to: var(--bg)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,Arial,"Apple Color Emoji","Segoe UI Emoji";line-height:1.6;display:flex;flex-direction:column}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:760px;padding:1.25rem;margin:0 auto}.main-container{flex:1;display:flex;align-items:center;justify-content:center;min-height:calc(100vh - var(--header-h))}.header{display:flex;width:100%;align-items:center;justify-content:space-between;gap:1rem;padding:1rem;position:sticky;top:0;background:linear-gradient(180deg,var(--header-bg-from),var(--header-bg-to));z-index:100;border-bottom:1px solid var(--border);min-height:var(--header-h);box-shadow:0 6px 20px #0000000a}.brand{font-weight:700;color:var(--text);letter-spacing:.02em;position:relative;display:inline-block;transition:color .2s ease,transform .2s ease}.brand:after{content:"";position:absolute;left:0;bottom:-4px;height:2px;width:100%;background:linear-gradient(90deg,var(--accent),transparent 70%);border-radius:2px;transform-origin:left;transform:scaleX(.3);opacity:.6;transition:transform .22s ease,opacity .22s ease}.brand:hover{transform:translateY(-1px)}.brand:hover:after{transform:scaleX(1);opacity:.9}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:1.25rem}.footer{padding:2rem 0;color:var(--muted);font-size:.9rem}@media (prefers-reduced-motion: reduce){*{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}