:root {
  --bg-primary: #0f1117;
  --bg-secondary: #161b27;
  --bg-card: #1e2535;
  --text-primary: #e2e8f0;
  --text-muted: #64748b;
  --text-dim: #374151;
  --border: #2d3748;
  --accent: #6366f1;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;
  --sidebar-width: 240px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; background: var(--bg-primary); color: var(--text-primary); min-height: 100vh; font-size: 14px; }
#app { height: 100vh; display: flex; flex-direction: column; }
.screen { display: none; }
.screen.active { display: flex; flex: 1; }

/* Login */
#login-screen { justify-content: center; align-items: center; background: var(--bg-primary); }
.login-container { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 40px; width: 100%; max-width: 420px; margin: 20px; }
.login-logo { font-size: 48px; text-align: center; margin-bottom: 12px; }
.login-container h1 { text-align: center; font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.login-subtitle { text-align: center; color: var(--text-muted); font-size: 13px; margin-bottom: 28px; }
.error-msg { color: var(--danger); font-size: 13px; margin-top: 10px; padding: 8px 12px; background: rgba(239,68,68,0.1); border-radius: 6px; }
.error-msg.hidden { display: none; }

/* Sidebar */
#main-app { flex-direction: row; width: 100%; }
#sidebar { width: var(--sidebar-width); background: var(--bg-secondary); border-right: 1px solid var(--border); display: flex; flex-direction: column; flex-shrink: 0; transition: width 0.2s; overflow: hidden; z-index: 100; }
#sidebar.collapsed { width: 60px; }
#sidebar.collapsed .logo-text, #sidebar.collapsed span:not(.logo):not(.badge) { display: none; }
.sidebar-header { display: flex; align-items: center; gap: 10px; padding: 20px 16px; border-bottom: 1px solid var(--border); }
.logo { font-size: 20px; flex-shrink: 0; }
.logo-text { font-weight: 700; font-size: 15px; flex: 1; white-space: nowrap; }
.sidebar-btn { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px; font-size: 18px; border-radius: 6px; }
.sidebar-btn:hover { color: var(--text-primary); }
.nav-links { list-style: none; padding: 12px 8px; flex: 1; overflow-y: auto; }
.nav-links li a { display: flex; align-items: center; gap: 10px; padding: 10px 10px; border-radius: 8px; color: var(--text-muted); text-decoration: none; font-size: 13px; font-weight: 500; transition: all 0.15s; white-space: nowrap; }
.nav-links li a:hover, .nav-links li a.active { background: rgba(99,102,241,0.15); color: var(--accent); }
.nav-links li a i { font-size: 16px; flex-shrink: 0; }
.sidebar-footer { padding: 12px 8px; border-top: 1px solid var(--border); }
.user-info { padding: 8px 10px; margin-bottom: 4px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.sidebar-footer a { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px; color: var(--text-muted); text-decoration: none; font-size: 13px; }
.sidebar-footer a:hover { color: var(--text-primary); }

/* Mobile topbar */
.mobile-topbar { display: none; position: fixed; top: 0; left: 0; right: 0; height: 56px; background: var(--bg-secondary); border-bottom: 1px solid var(--border); z-index: 200; align-items: center; gap: 12px; padding: 0 16px; }
.sidebar-backdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 150; }
.sidebar-backdrop.open { display: block; }

/* Content */
#content { flex: 1; overflow-y: auto; background: var(--bg-primary); }
.page { display: none; padding: 28px; max-width: 1200px; }
.page.active { display: block; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.page-header h2 { font-size: 22px; font-weight: 700; }
.page-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.section-title { font-size: 15px; font-weight: 600; color: var(--text-muted); margin: 24px 0 12px; text-transform: uppercase; letter-spacing: 0.5px; }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; margin-bottom: 8px; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.stat-label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.stat-value { font-size: 24px; font-weight: 700; }
.stat-value.positive { color: var(--success); }
.stat-value.negative { color: var(--danger); }
.stat-value.neutral { color: var(--text-primary); }
.stat-note { font-size: 11px; color: var(--text-muted); margin-top: 4px; }

/* Property/Member cards */
.property-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.prop-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; cursor: pointer; transition: border-color 0.15s; }
.prop-card:hover { border-color: var(--accent); }
.prop-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 16px; }
.prop-card-header h4 { font-size: 15px; font-weight: 600; }
.prop-card-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.prop-stat-label { font-size: 11px; color: var(--text-muted); margin-bottom: 2px; }
.prop-stat-value { font-size: 16px; font-weight: 600; }
.currency-badge { background: rgba(99,102,241,0.15); color: var(--accent); padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; }

/* Table */
.table-container { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th { text-align: left; padding: 10px 14px; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); border-bottom: 1px solid var(--border); white-space: nowrap; }
.data-table td { padding: 12px 14px; border-bottom: 1px solid rgba(45,55,72,0.5); vertical-align: middle; }
.data-table tr:hover td { background: rgba(255,255,255,0.02); }
.data-table td.actions { white-space: nowrap; }

/* Vault */
.vault-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.vault-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.vault-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.vault-card h4 { font-size: 15px; font-weight: 600; }
.vault-card-actions { display: flex; gap: 6px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px; font-size: 13px; font-weight: 500; cursor: pointer; border: none; transition: all 0.15s; text-decoration: none; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: #4f46e5; }
.btn-secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); }
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.btn-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.btn-danger:hover { background: rgba(239,68,68,0.25); }
.btn-success { background: rgba(16,185,129,0.15); color: var(--success); }
.btn-success:hover { background: rgba(16,185,129,0.25); }
.btn-full { width: 100%; justify-content: center; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.3px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; background: var(--bg-secondary); border: 1px solid var(--border); color: var(--text-primary); padding: 10px 12px; border-radius: 8px; font-size: 14px; font-family: inherit; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); }
.form-group textarea { min-height: 80px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.select-input { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-primary); padding: 7px 12px; border-radius: 8px; font-size: 13px; }
.checkbox-group { display: flex; align-items: center; gap: 8px; }

/* Badges */
.badge { padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge.admin { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge.member { background: rgba(99,102,241,0.15); color: var(--accent); }
.badge.debit { background: rgba(16,185,129,0.15); color: var(--success); }
.badge.credit { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge.prepaid { background: rgba(59,130,246,0.15); color: var(--info); }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.7); display: flex; align-items: flex-start; justify-content: center; z-index: 1000; padding: 20px; padding-top: max(20px, env(safe-area-inset-top)); overflow-y: auto; -webkit-overflow-scrolling: touch; }
.modal-overlay.hidden { display: none; }
.modal { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; width: 100%; max-width: 520px; max-height: 90vh; overflow-y: auto; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 20px; }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* Settings */
.settings-sections { display: grid; gap: 20px; max-width: 700px; }
.settings-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
.settings-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.user-row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--border); }
.user-row:last-child { border-bottom: none; }
.mt-2 { margin-top: 16px; }

/* Toast */
.toast { position: fixed; bottom: 24px; right: 24px; background: var(--bg-card); border: 1px solid var(--border); color: var(--text-primary); padding: 12px 20px; border-radius: 10px; font-size: 13px; z-index: 2000; transform: translateY(20px); opacity: 0; transition: all 0.3s; max-width: 320px; }
.toast.show { transform: translateY(0); opacity: 1; }
.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--danger); }

/* Reveal */
.revealed-value { font-family: monospace; background: rgba(99,102,241,0.15); border: 1px solid var(--accent); padding: 14px; border-radius: 8px; font-size: 18px; letter-spacing: 3px; word-break: break-all; text-align: center; margin: 12px 0; }
.countdown-wrap { margin-top: 10px; }
.countdown-label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.countdown-bar-bg { height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.countdown-bar { height: 4px; background: var(--danger); border-radius: 2px; transition: width 1s linear; }
.totp-input { font-size: 24px; letter-spacing: 8px; text-align: center; }
.placeholder-text { color: var(--text-muted); text-align: center; padding: 40px; }

/* Mobile */
@media (max-width: 768px) {
  .mobile-topbar { display: flex; }
  .page { padding: 16px; padding-top: 72px; }
  #sidebar { position: fixed; top: 0; left: -var(--sidebar-width); width: var(--sidebar-width); height: 100%; left: calc(-1 * var(--sidebar-width)); transition: left 0.25s; }
  #sidebar.mobile-open { left: 0; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .data-table th:nth-child(n+4), .data-table td:nth-child(n+4) { display: none; }
}