:root {
    --auth-bg: #f3f4f9;
    --auth-card: #fff;
    --auth-primary: #331661;
    --auth-accent: #1bcfb4;
    --auth-text: #2a2d3e;
    --auth-muted: #7f8498;
    --auth-border: #e0e4ec;
    --auth-error: #dc3545;
}
* { box-sizing: border-box; }
body.auth-page {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, system-ui, sans-serif;
    background: linear-gradient(135deg, #f3f4f9 0%, #e8eaf4 50%, #f0f4ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    color: var(--auth-text);
}
.auth-card {
    width: 100%;
    max-width: 440px;
    background: var(--auth-card);
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(51, 22, 97, 0.12);
    padding: 36px 32px;
    border: 1px solid var(--auth-border);
}
.auth-brand { text-align: center; margin-bottom: 28px; }
.auth-logo { height: 48px; margin-bottom: 12px; }
.auth-brand h1 { font-size: 1.35rem; margin: 0 0 8px; color: var(--auth-primary); }
.auth-tagline { font-size: 0.875rem; color: var(--auth-muted); margin: 0; line-height: 1.45; }
.auth-form h2 { font-size: 1.125rem; margin: 0 0 20px; }
.auth-form label { display: block; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--auth-muted); margin-bottom: 6px; }
.auth-form input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--auth-border);
    border-radius: 10px;
    font-size: 1rem;
    margin-bottom: 16px;
}
.auth-form input:focus { outline: 2px solid var(--auth-accent); border-color: var(--auth-accent); }
.auth-btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
}
.auth-btn-primary { background: var(--auth-primary); color: #fff; }
.auth-btn-primary:hover { filter: brightness(1.08); }
.auth-btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }
.auth-error { color: var(--auth-error); font-size: 0.875rem; margin: -8px 0 12px; }
.auth-links { text-align: center; font-size: 0.875rem; margin-top: 16px; }
.auth-links a { color: var(--auth-primary); font-weight: 500; }
.auth-demo { text-align: center; margin-top: 16px; color: var(--auth-muted); }
.auth-demo code { font-size: 0.8rem; background: #f3f4f9; padding: 2px 6px; border-radius: 4px; }
.auth-api-hint { margin-top: 20px; font-size: 0.75rem; color: var(--auth-muted); text-align: center; }
.auth-api-input { width: 100%; margin-top: 6px; padding: 8px; border: 1px solid var(--auth-border); border-radius: 6px; font-size: 0.8rem; }
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar { width: 240px; background: var(--auth-primary); color: #fff; padding: 24px 16px; }
.admin-main { flex: 1; padding: 24px; background: var(--auth-bg); overflow: auto; }
.admin-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 12px; overflow: hidden; }
.admin-table th, .admin-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--auth-border); font-size: 0.875rem; }
.admin-table th { background: #f3f4f9; font-weight: 600; }
.badge { display: inline-block; padding: 4px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-active { background: #d4edda; color: #155724; }
.badge-suspended { background: #f8d7da; color: #721c24; }
.badge-trial { background: #fff3cd; color: #856404; }
.plan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin: 20px 0; }
.plan-card { border: 2px solid var(--auth-border); border-radius: 12px; padding: 20px; cursor: pointer; transition: border-color 0.2s; }
.plan-card.selected { border-color: var(--auth-accent); background: rgba(27, 207, 180, 0.06); }
.plan-card h3 { margin: 0 0 8px; }
.plan-price { font-size: 1.5rem; font-weight: 700; color: var(--auth-primary); }