:root{--primary:#0f172a;--primary-light:#1e293b;--accent:#3b82f6;--accent-hover:#2563eb;--bg:#f8fafc;--text:#0f172a;--text-muted:#64748b;--border:#e2e8f0;--success:#10b981;--error:#ef4444}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:2rem}.card{background:#fff;border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,.1);padding:1.5rem}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:8px;font-weight:500;cursor:pointer;border:none;transition:all .2s}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.input{width:100%;padding:.75rem 1rem;border:1px solid var(--border);border-radius:8px;font-size:1rem}.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.1)}