/* Construct SDK — Design System */
:root{--c-bg:#0a0a12;--c-surface:rgba(255,255,255,0.04);--c-surface-hover:rgba(255,255,255,0.06);--c-surface-raised:rgba(255,255,255,0.08);--c-text:#e4e4ed;--c-text-secondary:rgba(228,228,237,0.7);--c-text-muted:rgba(228,228,237,0.4);--c-accent:#6366f1;--c-accent-muted:rgba(99,102,241,0.15);--c-border:rgba(255,255,255,0.08);--c-error:#ef4444;--c-error-border:rgba(239,68,68,0.3);--c-error-muted:rgba(239,68,68,0.08);--c-radius-xs:4px;--c-radius-sm:6px;--c-radius-md:10px;--c-shadow:0 1px 3px rgba(0,0,0,0.3);--c-font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--c-font-mono:"SF Mono",SFMono-Regular,Menlo,Consolas,monospace}
*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--c-font);background:var(--c-bg);color:var(--c-text);-webkit-font-smoothing:antialiased}
.app{min-height:100vh}.container{max-width:560px;margin:0 auto}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:6px 14px;border-radius:var(--c-radius-sm);font-size:12px;font-weight:600;font-family:var(--c-font);border:none;cursor:pointer;background:var(--c-accent);color:#fff;transition:all 0.15s}
.btn:hover{filter:brightness(1.1)}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:6px 14px;border-radius:var(--c-radius-sm);font-size:12px;font-weight:500;font-family:var(--c-font);border:1px solid var(--c-border);cursor:pointer;background:var(--c-surface);color:var(--c-text-secondary);transition:all 0.15s}
.btn-secondary:hover{background:var(--c-surface-hover);color:var(--c-text)}.btn-sm{padding:5px 10px;font-size:11px}
.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:var(--c-radius-xs);font-size:10px;font-weight:500;background:var(--c-surface);color:var(--c-text-muted);border:1px solid var(--c-border)}
.badge-accent{background:var(--c-accent-muted);color:var(--c-accent);border-color:transparent}
.fade-in{animation:fadeIn 200ms ease-out}@keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}