:root{--qc-bg: #f5f7fa;--qc-surface: #ffffff;--qc-border: #e2e8f0;--qc-text: #1a202c;--qc-text-muted: #64748b;--qc-primary: #0f766e;--qc-primary-dark: #115e59;--qc-danger: #dc2626;--qc-warning: #d97706;--qc-success: #16a34a;--qc-radius: 8px;--qc-shadow: 0 1px 2px rgba(15, 23, 42, .08), 0 1px 3px rgba(15, 23, 42, .06);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--qc-bg);color:var(--qc-text)}h1,h2,h3,h4{margin:0 0 .5rem}a{color:var(--qc-primary)}button{font-family:inherit;cursor:pointer}.qc-card{background:var(--qc-surface);border:1px solid var(--qc-border);border-radius:var(--qc-radius);box-shadow:var(--qc-shadow);padding:1.25rem}.qc-btn{display:inline-flex;align-items:center;gap:.4rem;padding:.55rem 1.1rem;border-radius:var(--qc-radius);border:1px solid transparent;font-size:.9rem;font-weight:600;transition:opacity .15s ease}.qc-btn:disabled{opacity:.6;cursor:not-allowed}.qc-btn-primary{background:var(--qc-primary);color:#fff}.qc-btn-primary:hover:not(:disabled){background:var(--qc-primary-dark)}.qc-btn-secondary{background:var(--qc-surface);color:var(--qc-text);border-color:var(--qc-border)}.qc-btn-danger{background:var(--qc-surface);color:var(--qc-danger);border-color:var(--qc-danger)}.qc-input,.qc-select,.qc-textarea{width:100%;padding:.55rem .7rem;border-radius:var(--qc-radius);border:1px solid var(--qc-border);font-size:.9rem;background:var(--qc-surface);color:var(--qc-text)}.qc-label{display:block;font-size:.82rem;font-weight:600;color:var(--qc-text-muted);margin-bottom:.3rem}.qc-badge{display:inline-flex;align-items:center;gap:.3rem;padding:.15rem .55rem;border-radius:999px;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.02em}.qc-badge-success{background:#dcfce7;color:#166534}.qc-badge-warning{background:#fef3c7;color:#92400e}.qc-badge-danger{background:#fee2e2;color:#991b1b}.qc-badge-neutral{background:#e2e8f0;color:#475569}.qc-alert{padding:.75rem 1rem;border-radius:var(--qc-radius);font-size:.88rem;border:1px solid transparent}.qc-alert-error{background:#fef2f2;border-color:#fecaca;color:#991b1b}.qc-alert-info{background:#eff6ff;border-color:#bfdbfe;color:#1e40af}.qc-alert-success{background:#f0fdf4;border-color:#bbf7d0;color:#166534}.qc-page{max-width:1100px;margin:0 auto;padding:1.5rem}.qc-grid{display:grid;gap:1rem}.qc-grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.qc-grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}@media (max-width: 900px){.qc-grid-cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 600px){.qc-grid-cols-2,.qc-grid-cols-4{grid-template-columns:1fr}}