:root{--color-primary:#1d4ed8;--color-primary-600:#1e40af;--color-primary-700:#1e3a8a;--color-primary-50:#eff6ff;--color-primary-100:#dbeafe;--color-accent:#3b82f6;--color-accent-600:#2563eb;--color-ink:#0b1220;--color-text:#1e293b;--color-muted:#64748b;--color-border:#e7ebf0;--color-surface:#fff;--color-bg:#fff;--color-success:#16a34a;--color-warning:#ca8a04;--color-danger:#dc2626;--font-sans:"Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono:"IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;--fs-xs:.75rem;--fs-sm:.875rem;--fs-base:1rem;--fs-lg:1.125rem;--fs-xl:1.5rem;--fs-2xl:2.25rem;--fs-3xl:3rem;--fs-4xl:clamp(2.75rem, 6vw, 4.5rem);--sp-1:.25rem;--sp-2:.5rem;--sp-3:.75rem;--sp-4:1rem;--sp-6:1.5rem;--sp-8:2rem;--sp-12:3rem;--radius-sm:6px;--radius:10px;--radius-lg:16px;--shadow-sm:0 1px 2px #0f172a0f;--shadow:0 4px 16px #0f172a14;--shadow-lg:0 12px 32px #0f172a1f;--panel-w:420px;--z-panel:1000;--z-overlay:1100}*,:before,:after{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{font-family:var(--font-sans);font-size:var(--fs-base);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit}.btn{justify-content:center;align-items:center;gap:var(--sp-2);padding:var(--sp-3) var(--sp-6);font-size:var(--fs-sm);cursor:pointer;border:1px solid #0000;border-radius:999px;font-weight:600;line-height:1;transition:background .15s,border-color .15s,transform .1s,box-shadow .15s;display:inline-flex}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:0 1px 2px #1d4ed840}.btn-primary:hover{background:var(--color-primary-600);box-shadow:0 6px 18px #1d4ed847}.btn-ghost{border-color:var(--color-border);color:var(--color-ink);background:0 0}.btn-ghost:hover{background:#f4f7fb;border-color:#d4dbe4}.btn-lg{padding:var(--sp-4) var(--sp-8);font-size:var(--fs-base)}