:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg: #f3f4f6;
    --card-bg: #ffffff;
    --text: #1f2937;
    --text-light: #6b7280;
    --border: #e5e7eb;
}
body { font-family: 'Inter', system-ui, sans-serif; background-color: var(--bg); color: var(--text); margin: 0; padding: 0; line-height: 1.5; }
.container { max-width: 800px; margin: 40px auto; padding: 0 20px; }
.card { background: var(--card-bg); border-radius: 12px; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); padding: 2rem; margin-bottom: 2rem; }
h1, h2, h3 { margin-top: 0; color: #111827; }
.subtitle { color: var(--text-light); font-size: 0.9rem; margin-bottom: 1.5rem; display: block; }
input[type="text"], input[type="password"] { width: 100%; padding: 0.75rem; border: 1px solid var(--border); border-radius: 6px; margin-bottom: 1rem; box-sizing: border-box; }
input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2); }
.btn { display: inline-block; background-color: var(--primary); color: white; padding: 0.75rem 1.5rem; border-radius: 6px; border: none; font-weight: 500; cursor: pointer; text-decoration: none; width: 100%; box-sizing: border-box; text-align: center; }
.btn:hover { background-color: var(--primary-hover); }
.btn-secondary { background-color: white; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background-color: #f9fafb; }
.badge { background: #dbeafe; color: #1e40af; padding: 4px 12px; border-radius: 999px; font-size: 0.875rem; font-weight: 500; }
.cred-item { border: 1px solid var(--border); border-radius: 8px; padding: 1rem; margin-bottom: 1rem; background: #f9fafb; }
.cred-row { display: flex; justify-content: space-between; margin-bottom: 0.5rem; }
.cred-label { color: var(--text-light); font-size: 0.875rem; }
.cred-val { font-family: monospace; font-weight: 600; }
.admin-grid { display: grid; gap: 20px; }
.qr-container { text-align: center; margin-top: 1rem; padding-top: 1rem; }