:root {
  --primary: #3D5A3D;
  --accent: #C9A961;
  --bg: #FAF6EE;
  --surface: #FFFFFF;
  --text: #3A2E1F;
  --border: #E3DAC9;
  --danger: #8B2E2E;
  --success: #7BA05B;
}
* { box-sizing: border-box; margin: 0; padding: 0; font-family: Tahoma, sans-serif; }
body { background: var(--bg); color: var(--text); }
.hidden { display: none !important; }
.screen { min-height: 100vh; display: flex; flex-direction: column; }
#login-screen { justify-content: center; align-items: center; }
.login-box { background: var(--surface); padding: 40px; border-radius: 20px; width: 100%; max-width: 400px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); border: 1px solid var(--border); }
.login-box h2 { text-align: center; color: var(--primary); margin-bottom: 20px; }
.login-box input { width: 100%; padding: 12px; margin-bottom: 12px; border: 1px solid var(--border); border-radius: 10px; text-align: center; }
.login-box button { width: 100%; padding: 12px; background: var(--primary); color: #fff; border: none; border-radius: 10px; cursor: pointer; font-size: 16px; }
.error { color: var(--danger); text-align: center; margin-top: 10px; }
header { background: var(--primary); color: #fff; padding: 16px 24px; display: flex; justify-content: space-between; align-items: center; }
.logout { background: transparent; border: 1px solid #fff; color: #fff; padding: 8px 16px; border-radius: 8px; cursor: pointer; }
.tabs { display: flex; background: var(--surface); border-bottom: 1px solid var(--border); padding: 0 24px; overflow-x: auto; }
.tab { padding: 16px 24px; border: none; background: transparent; cursor: pointer; color: #666; border-bottom: 3px solid transparent; white-space: nowrap; }
.tab.active { color: var(--primary); border-bottom-color: var(--accent); font-weight: bold; }
main { padding: 24px; max-width: 1200px; margin: 0 auto; width: 100%; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.stat-card { background: var(--surface); padding: 24px; border-radius: 16px; text-align: center; border: 1px solid var(--border); border-top: 4px solid var(--primary); }
.stat-card.premium { border-top-color: var(--accent); }
.stat-card.free { border-top-color: #999; }
.stat-card span { font-size: 32px; font-weight: bold; color: var(--primary); }
.stat-card p { color: #666; margin-top: 8px; }
.filter-bar { display: flex; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.filter-bar input { flex: 1; padding: 12px; border: 1px solid var(--border); border-radius: 10px; min-width: 200px; }
.list { display: flex; flex-direction: column; gap: 12px; }
.user-card { background: var(--surface); padding: 16px 20px; border-radius: 12px; display: flex; justify-content: space-between; align-items: center; border: 1px solid var(--border); gap: 12px; flex-wrap: wrap; }
.user-info h4 { color: var(--primary); margin-bottom: 4px; }
.user-info p { font-size: 13px; color: #666; margin: 2px 0; }
.badge { padding: 4px 12px; border-radius: 12px; font-size: 12px; font-weight: bold; }
.badge-premium { background: var(--accent); color: #fff; }
.badge-free { background: #E0E0E0; color: #666; }
.badge-inactive { background: #ccc; color: #666; }
.user-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.user-actions button { padding: 8px 16px; background: var(--primary); color: #fff; border: none; border-radius: 8px; cursor: pointer; font-size: 13px; }
.user-actions button.btn-danger { background: var(--danger); }

/* دکمه‌های عمومی */
.btn-primary { padding: 10px 20px; background: var(--primary); color: #fff; border: none; border-radius: 10px; cursor: pointer; font-size: 14px; font-weight: bold; }
.btn-primary:hover { opacity: 0.9; }
.btn-secondary { padding: 10px 20px; background: #eee; color: var(--text); border: none; border-radius: 10px; cursor: pointer; font-size: 14px; }
.btn-danger { padding: 8px 16px; background: var(--danger); color: #fff; border: none; border-radius: 8px; cursor: pointer; font-size: 13px; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: flex; justify-content: center; align-items: center; z-index: 1000; padding: 20px; overflow-y: auto; }
.modal-box { background: var(--surface); border-radius: 20px; padding: 30px; width: 100%; max-width: 500px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.modal-box h3 { color: var(--primary); margin-bottom: 20px; text-align: center; }
.modal-box label { display: block; margin-top: 14px; margin-bottom: 6px; color: var(--text); font-size: 14px; font-weight: bold; }
.modal-box input[type="text"], .modal-box input[type="number"], .modal-box select { width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; }