: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; }
.tab { padding: 16px 24px; border: none; background: transparent; cursor: pointer; color: #666; border-bottom: 3px solid transparent; }
.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; }
.filter-bar input { flex: 1; padding: 12px; border: 1px solid var(--border); border-radius: 10px; }
.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); }
.user-info h4 { color: var(--primary); margin-bottom: 4px; }
.user-info p { font-size: 13px; color: #666; }
.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; }
.user-actions button { padding: 8px 16px; background: var(--primary); color: #fff; border: none; border-radius: 8px; cursor: pointer; }