/* billing_plans.html */
.plans-page { max-width: 1100px; margin: 0 auto; padding: 40px 20px; }
.plans-header { text-align: center; margin-bottom: 40px; }
.plans-header h1 { font-size: 2rem; font-weight: 700; color: var(--text-primary); margin: 0 0 8px; }
.plans-header p { color: var(--text-secondary); font-size: 1rem; }
.plans-section { margin-bottom: 48px; }
.plans-section h2 { font-size: 1.25rem; font-weight: 600; color: var(--text-primary); margin: 0 0 20px; padding-bottom: 10px; border-bottom: 1px solid var(--border-color); }
.plans-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.plan-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 24px; display: flex; flex-direction: column; }
.plan-card.featured { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.plan-card h3 { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); margin: 0 0 4px; }
.plan-card .plan-desc { font-size: 0.82rem; color: var(--text-muted); margin: 0 0 16px; }
.plan-price { font-size: 1.8rem; font-weight: 700; color: var(--text-primary); margin: 0 0 4px; }
.plan-price span { font-size: 0.85rem; font-weight: 400; color: var(--text-muted); }
.plan-note { font-size: 0.78rem; color: var(--text-muted); margin: 0 0 16px; }
.plan-features { list-style: none; padding: 0; margin: 0 0 20px; flex: 1; }
.plan-features li { font-size: 0.85rem; color: var(--text-secondary); padding: 4px 0; display: flex; align-items: center; gap: 8px; }
.plan-features li svg { flex-shrink: 0; }
.plan-btn { display: block; width: 100%; padding: 10px; border-radius: 8px; font-size: 0.88rem; font-weight: 500; text-align: center; border: none; cursor: pointer; text-decoration: none; transition: all 0.15s; }
.plan-btn-primary { background: var(--accent); color: #fff; }
.plan-btn-primary:hover { opacity: 0.9; }
.plan-btn-outline { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.plan-btn-outline:hover { background: var(--accent); color: #fff; }
.plan-toggle { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 32px; }
.plan-toggle label { font-size: 0.88rem; color: var(--text-secondary); cursor: pointer; padding: 6px 14px; border-radius: 8px; transition: all 0.15s; }
.plan-toggle label.active { color: var(--accent); font-weight: 600; background: var(--bg-elevated); }
.plan-toggle .toggle-switch { position: relative; width: 44px; height: 24px; background: var(--border-color); border-radius: 12px; cursor: pointer; transition: background 0.2s; }
.plan-toggle .toggle-switch.annual { background: var(--accent); }
.plan-toggle .toggle-switch::after { content: ''; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; background: #fff; border-radius: 50%; transition: transform 0.2s; }
.plan-toggle .toggle-switch.annual::after { transform: translateX(20px); }
.plan-badge { display: inline-block; background: var(--accent); color: #fff; font-size: 0.68rem; font-weight: 600; padding: 2px 8px; border-radius: 10px; margin-left: 8px; }
.plan-badge-save { background: #10b981; }
.credit-display { background: var(--bg-elevated); border: 1px solid var(--border-color); border-radius: 10px; padding: 16px 20px; margin-bottom: 32px; display: flex; align-items: center; gap: 16px; }
.credit-num { font-size: 1.6rem; font-weight: 700; color: var(--accent); }
.credit-label { font-size: 0.85rem; color: var(--text-secondary); }
.annual-price { display: none; }
.monthly-price { display: block; }
body.annual-billing .annual-price { display: block; }
body.annual-billing .monthly-price { display: none; }
@media (max-width: 768px) {
    .plans-grid { grid-template-columns: 1fr; }
}