/* ── Design Tokens ────────────────────────────────────────────────────────── */
:root {
  --bg-base: #0d0f14;
  --bg-surface: #13161e;
  --bg-raised: #1a1e28;

  --accent: #6ee7b7;
  --accent-dim: #34d39940;
  --accent-text: #10b981;
  --danger: #f87171;
  --danger-dim: #f8717120;
  --income: #60a5fa;
  --income-dim: #60a5fa20;

  --text-primary: #e8eaf0;
  --text-secondary: #8b92a8;
  --text-muted: #4b5268;

  --border: #1f2435;
  --border-light: #262d40;
  --radius: 12px;
  --radius-sm: 8px;
  --sidebar-w: 220px;

  --font-display: 'Georgia', serif;
  --font-body: system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
}

/* ── Reset ────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  display: flex;
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.5;
}

/* ── Auth Wall ────────────────────────────────────────────────────────────── */
.auth-wall {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9000;
  transition: opacity 0.3s;
}
.auth-wall.hidden {
  opacity: 0;
  pointer-events: none;
}

.auth-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 36px;
  width: 100%;
  max-width: 400px;
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.auth-logo .logo-icon { font-size: 22px; color: var(--accent); }
.auth-logo .logo-text {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
}
.auth-tagline {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 24px;
}

.auth-tabs {
  display: flex;
  background: var(--bg-base);
  border-radius: var(--radius-sm);
  padding: 3px;
  margin-bottom: 24px;
}
.auth-tab {
  flex: 1;
  padding: 8px;
  border: none;
  background: none;
  color: var(--text-secondary);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-body);
  transition: all 0.15s;
}
.auth-tab.active { background: var(--accent-dim); color: var(--accent); }

.auth-form { display: none; flex-direction: column; gap: 14px; }
.auth-form.active { display: flex; }

.auth-error {
  font-size: 13px;
  color: var(--danger);
  min-height: 18px;
}

.btn-full { width: 100%; justify-content: center; padding: 12px; margin-top: 4px; }

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 28px 20px 24px;
  border-bottom: 1px solid var(--border);
}
.logo-icon { font-size: 22px; color: var(--accent); }
.logo-text {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: none;
  background: none;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  font-family: var(--font-body);
  text-align: left;
  transition: all 0.15s;
  width: 100%;
}
.nav-btn svg {
  width: 16px; height: 16px;
  stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  flex-shrink: 0;
}
.nav-btn:hover { background: var(--bg-raised); color: var(--text-primary); }
.nav-btn.active { background: var(--accent-dim); color: var(--accent); }

/* ── Sidebar Footer ───────────────────────────────────────────────────────── */
.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.user-pill {
  display: flex;
  align-items: center;
  gap: 10px;
}
.user-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  text-transform: uppercase;
}
.user-info { flex: 1; min-width: 0; }
.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-email {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.logout-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  background: none;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font-body);
  cursor: pointer;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  width: 100%;
  transition: all 0.15s;
}
.logout-btn:hover { border-color: var(--danger); color: var(--danger); }

.db-status {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  color: var(--text-muted);
}
.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}
.status-dot.connected { background: var(--accent); box-shadow: 0 0 6px var(--accent); }
.status-dot.error { background: var(--danger); }

/* ── Main ─────────────────────────────────────────────────────────────────── */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 32px;
  max-width: 1200px;
}

.view { display: none; }
.view.active { display: block; }

.view-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
}
.view-header h1 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.subtitle { color: var(--text-secondary); font-size: 13px; margin-top: 3px; }

/* ── Cards ────────────────────────────────────────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
}
.card--balance::before { background: linear-gradient(90deg, var(--accent), var(--income)); }
.card--income::before { background: var(--income); }
.card--expense::before { background: var(--danger); }

.card-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.card-amount {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -1px;
}
.card--balance .card-amount { color: var(--accent); }
.card--income .card-amount { color: var(--income); }
.card--expense .card-amount { color: var(--danger); }
.card-sub { font-size: 12px; color: var(--text-secondary); margin-top: 6px; }

/* ── Charts ───────────────────────────────────────────────────────────────── */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}
.charts-grid--full { grid-template-columns: 1fr; }

.chart-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}
.chart-card h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.chart-wrap { position: relative; height: 220px; }
.chart-wrap--donut { height: 200px; }
.chart-wrap--tall { height: 300px; }
.chip {
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}

/* ── Section Card ─────────────────────────────────────────────────────────── */
.section-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.section-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
}
.section-card-header h3 { font-size: 14px; font-weight: 600; }

/* ── Transactions ─────────────────────────────────────────────────────────── */
.tx-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}
.tx-item:last-child { border-bottom: none; }
.tx-item:hover { background: var(--bg-raised); }

.tx-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
}
.tx-info { flex: 1; min-width: 0; }
.tx-title {
  font-size: 14px; font-weight: 500;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tx-meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.tx-amount { font-family: var(--font-mono); font-size: 15px; font-weight: 600; flex-shrink: 0; }
.tx-amount.expense { color: var(--danger); }
.tx-amount.income { color: var(--income); }

.tx-actions { display: flex; gap: 6px; opacity: 0; transition: opacity 0.15s; }
.tx-item:hover .tx-actions { opacity: 1; }
.tx-action-btn {
  width: 28px; height: 28px;
  border: none; background: none;
  color: var(--text-muted); cursor: pointer;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; transition: all 0.1s;
}
.tx-action-btn:hover { background: var(--bg-raised); color: var(--text-primary); }
.tx-action-btn.delete:hover { background: var(--danger-dim); color: var(--danger); }

.empty-state {
  text-align: center; padding: 48px 24px; color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 32px; margin-bottom: 10px; }

/* ── Filters ──────────────────────────────────────────────────────────────── */
.filters-bar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.filter-select {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px; font-family: var(--font-body);
  cursor: pointer; outline: none; transition: border-color 0.15s;
}
.filter-select:focus { border-color: var(--accent); }
.filter-select option { background: var(--bg-raised); }

/* ── Pagination ───────────────────────────────────────────────────────────── */
.pagination { display: flex; gap: 6px; justify-content: center; padding: 20px 0; }
.page-btn {
  width: 32px; height: 32px;
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer; font-size: 13px; transition: all 0.1s;
}
.page-btn:hover, .page-btn.active {
  background: var(--accent-dim); border-color: var(--accent); color: var(--accent);
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn-primary {
  background: var(--accent);
  color: #0a1a12;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600;
  cursor: pointer; font-family: var(--font-body);
  transition: opacity 0.15s, transform 0.1s;
  white-space: nowrap;
}
.btn-primary:hover { opacity: 0.88; }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost {
  background: none;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px; cursor: pointer; font-family: var(--font-body);
  transition: all 0.15s;
}
.btn-ghost:hover { border-color: var(--text-secondary); color: var(--text-primary); }

.link-btn {
  background: none; border: none;
  color: var(--accent-text); font-size: 13px;
  cursor: pointer; font-family: var(--font-body);
}
.link-btn:hover { text-decoration: underline; }

/* ── Modal ────────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
  opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 16px; padding: 28px;
  width: 100%; max-width: 460px;
  transform: translateY(12px); transition: transform 0.2s;
}
.modal-overlay.open .modal { transform: translateY(0); }

.modal-header {
  display: flex; align-items: center;
  justify-content: space-between; margin-bottom: 20px;
}
.modal-header h2 { font-family: var(--font-display); font-size: 20px; font-weight: 700; }
.modal-close {
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 16px;
  width: 30px; height: 30px; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: var(--bg-raised); color: var(--text-primary); }

.type-toggle {
  display: flex; background: var(--bg-base);
  border-radius: var(--radius-sm); padding: 3px; margin-bottom: 20px;
}
.toggle-btn {
  flex: 1; padding: 8px; border: none; background: none;
  color: var(--text-secondary); border-radius: 6px;
  font-size: 13px; font-weight: 500; cursor: pointer;
  font-family: var(--font-body); transition: all 0.15s;
}
.toggle-btn.active[data-type="expense"] { background: var(--danger-dim); color: var(--danger); }
.toggle-btn.active[data-type="income"] { background: var(--income-dim); color: var(--income); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group--full { grid-column: 1 / -1; }
.form-group label {
  font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted);
}
.optional { font-weight: 400; text-transform: none; letter-spacing: 0; }
.form-group input, .form-group select, .form-group textarea {
  background: var(--bg-raised);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  padding: 10px 12px; border-radius: var(--radius-sm);
  font-size: 14px; font-family: var(--font-body);
  outline: none; transition: border-color 0.15s; resize: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent);
}
.form-group select option { background: var(--bg-raised); }

.modal-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* ── Category Breakdown ───────────────────────────────────────────────────── */
.cat-row { padding: 10px 0; border-bottom: 1px solid var(--border); }
.cat-row:last-child { border-bottom: none; }
.cat-row-top { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 13px; }
.cat-name { color: var(--text-primary); font-weight: 500; }
.cat-amt { font-family: var(--font-mono); color: var(--danger); font-weight: 600; }
.cat-bar-bg { height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.cat-bar { height: 100%; border-radius: 2px; transition: width 0.6s ease; }

/* ── Toast ────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--bg-raised);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  padding: 12px 18px; border-radius: var(--radius-sm);
  font-size: 14px; z-index: 9999;
  transform: translateY(80px); opacity: 0; transition: all 0.25s;
  max-width: 280px;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-left: 3px solid var(--accent); }
.toast.error { border-left: 3px solid var(--danger); }

/* ── Scrollbar ────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .cards-grid { grid-template-columns: 1fr 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .sidebar { display: none; }
  .main { margin-left: 0; padding: 16px; }
  .cards-grid { grid-template-columns: 1fr; }
}