/* ═══════════════════════════════════════════════════════
   GASTOS NURIA — Design System
   Dark mode · iPad-first · Glassmorphism
   ═══════════════════════════════════════════════════════ */

/* ─── Tokens ─── */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-glass: rgba(17, 24, 39, 0.6);
  --bg-hover: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --border-active: rgba(6, 182, 212, 0.4);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent: #06b6d4;
  --accent-light: rgba(6, 182, 212, 0.12);
  --accent-green: #10b981;
  --accent-gradient: linear-gradient(135deg, #06b6d4, #10b981);

  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.08);
  --danger-border: rgba(239, 68, 68, 0.2);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.08);
  --positive: #10b981;
  --positive-bg: rgba(16, 185, 129, 0.08);
  --negative: #ef4444;

  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  --header-h: 56px;
  --tab-h: 64px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* ─── Reset ─── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; overflow: hidden; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
}

/* ─── App Layout ─── */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
}

/* ─── Header ─── */
.app-header {
  height: var(--header-h);
  min-height: var(--header-h);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}
.app-header .logo {
  font-size: 1.15rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.app-header .sync-badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: var(--transition);
}
.sync-badge.saved {
  background: var(--positive-bg);
  color: var(--positive);
  border: 1px solid rgba(16, 185, 129, 0.2);
}
.sync-badge.saving {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}
.sync-badge.error {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger-border);
}

/* ─── Main Content ─── */
.app-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 20px;
  padding-bottom: calc(var(--tab-h) + var(--safe-bottom) + 20px);
  background: var(--bg-primary);
  background-image:
    radial-gradient(ellipse at 10% 0%, rgba(6, 182, 212, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 90% 100%, rgba(16, 185, 129, 0.04) 0%, transparent 50%);
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}
.app-content::-webkit-scrollbar { width: 5px; }
.app-content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* Views */
.view { display: none; animation: fadeUp 0.35s ease-out; }
.view.active { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Tab Bar ─── */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--tab-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 8px 16px;
  border: none;
  background: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: var(--transition);
  -webkit-tap-highlight-color: transparent;
  min-width: 64px;
}
.tab-item .tab-icon { font-size: 1.35rem; line-height: 1; }
.tab-item.active { color: var(--accent); }
.tab-item:active { transform: scale(0.92); }

/* ─── Cards ─── */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.card-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-title .icon { font-size: 1rem; }

/* ─── KPI Cards ─── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}
.kpi-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
.kpi-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.kpi-value {
  font-size: 1.4rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.kpi-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 2px;
}
.kpi-value.positive { color: var(--positive); }
.kpi-value.negative { color: var(--negative); }
.kpi-value.accent { color: var(--accent); }

/* ─── Saldo Update Button ─── */
.saldo-update-card {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(16, 185, 129, 0.1));
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition);
}
.saldo-update-card:active { transform: scale(0.98); }
.saldo-info .saldo-label { font-size: 0.72rem; color: var(--text-secondary); }
.saldo-info .saldo-amount {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.saldo-info .saldo-date { font-size: 0.68rem; color: var(--text-muted); margin-top: 2px; }
.saldo-update-btn {
  padding: 10px 18px;
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

/* ─── Alert Banner ─── */
.alert-banner {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.85rem;
  animation: fadeUp 0.4s ease-out;
}
.alert-banner.danger {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
}
.alert-banner.warning {
  background: var(--warning-bg);
  border: 1px solid rgba(245, 158, 11, 0.2);
}
.alert-banner.ok {
  background: var(--positive-bg);
  border: 1px solid rgba(16, 185, 129, 0.2);
}
.alert-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 1px; }
.alert-text strong { display: block; margin-bottom: 3px; }
.alert-text span { color: var(--text-secondary); font-size: 0.8rem; }

/* ─── Chart Container ─── */
.chart-container {
  position: relative;
  width: 100%;
  height: 260px;
}
.chart-container canvas { width: 100% !important; height: 100% !important; }

/* ─── Collapsible Sections ─── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 2px;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
  -webkit-user-select: none;
}
.section-header:active { background: var(--bg-hover); }
.section-header h3 {
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-header .badge {
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--accent-light);
  color: var(--accent);
}
.section-header .chevron {
  font-size: 0.9rem;
  transition: transform 0.3s ease;
  color: var(--text-muted);
}
.section-header.open .chevron { transform: rotate(180deg); }
.section-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  border: 1px solid transparent;
  border-radius: 0 0 var(--radius) var(--radius);
}
.section-body.open {
  max-height: 2000px;
  border-color: var(--border);
  border-top: none;
  margin-bottom: 16px;
}

/* ─── Data Table ─── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}
.data-table th {
  padding: 10px 14px;
  text-align: left;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: 5;
}
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  white-space: nowrap;
}
.data-table tr:active td { background: var(--bg-hover); }
.data-table .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.data-table .positive { color: var(--positive); }
.data-table .negative { color: var(--negative); }
.data-table .actions { text-align: center; width: 44px; padding: 4px; }

/* ─── Buttons ─── */
.btn {
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.96); }
.btn.primary {
  background: var(--accent-gradient);
  border: none;
  color: #fff;
}
.btn.danger {
  color: var(--danger);
  border-color: var(--danger-border);
}
.btn.danger:active { background: var(--danger-bg); }
.btn-row {
  display: flex;
  gap: 10px;
  padding: 14px;
  flex-wrap: wrap;
}
.btn-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
}
.btn-icon:active { background: var(--danger-bg); color: var(--danger); }

/* ─── Period Selector ─── */
.period-btn.active {
  background: var(--accent-gradient) !important;
  border-color: transparent !important;
  color: #fff !important;
}
.period-btn:not(.active):hover,
.period-btn:not(.active):active {
  background: rgba(255, 255, 255, 0.1);
}

/* ─── Daily Balance Table ─── */
.daily-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}
.daily-table thead th {
  padding: 8px 10px;
  text-align: left;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}
.daily-table tbody td {
  padding: 5px 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.025);
}
.daily-table tbody tr:hover {
  background: var(--bg-hover);
}
.daily-table .alert-row {
  background: rgba(239, 68, 68, 0.06);
}
.daily-table .alert-row:hover {
  background: rgba(239, 68, 68, 0.12);
}
.daily-table .positive { color: var(--positive); }
.daily-table .negative { color: var(--negative); }

/* ─── Modal ─── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  animation: fadeUp 0.3s ease-out;
}
.modal-box h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
}
.modal-box .form-group { margin-bottom: 16px; }
.modal-box label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.modal-box input, .modal-box select {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
  min-height: 44px;
}
.modal-box input:focus, .modal-box select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}
.modal-box input[type="number"] { font-variant-numeric: tabular-nums; font-size: 1.3rem; font-weight: 600; }
.modal-box select option { background: var(--bg-secondary); }
.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ─── Day Detail Table ─── */
.day-row {
  display: grid;
  grid-template-columns: 44px 1fr 90px 80px;
  align-items: center;
  padding: 9px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  font-size: 0.82rem;
  transition: background 0.15s;
}
.day-row:active { background: var(--bg-hover); }
.day-row.header {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--bg-secondary);
  position: sticky;
  top: 0;
  z-index: 5;
}
.day-row .day-num { color: var(--text-muted); font-variant-numeric: tabular-nums; }
.day-row .day-bar-wrap {
  height: 6px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 3px;
  overflow: hidden;
}
.day-row .day-bar {
  height: 100%;
  border-radius: 3px;
  transition: width 0.4s ease-out;
}
.day-row .day-balance {
  text-align: right;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.day-row .day-change {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.day-row.today { background: var(--accent-light); border-left: 3px solid var(--accent); }
.day-row.alert { background: var(--danger-bg); }

/* ─── Simulator ─── */
.sim-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.1));
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.85rem;
}
.sim-banner .sim-icon { font-size: 1.4rem; }
.sim-actions { display: flex; gap: 10px; margin-bottom: 16px; }

/* ─── Config ─── */
.config-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}
.config-item:last-child { border-bottom: none; }
.config-label { font-size: 0.88rem; }
.config-desc { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }
.config-value {
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: right;
  width: 100px;
  outline: none;
  min-height: 44px;
}
.config-value:focus { border-color: var(--accent); }

/* ─── Toast ─── */
.toast-container {
  position: fixed;
  top: calc(var(--header-h) + 12px);
  right: 16px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 12px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.82rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toast.success { border-left: 3px solid var(--positive); }
.toast.error { border-left: 3px solid var(--danger); }
@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ─── Two Column Grid ─── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ─── Expense Bar Chart ─── */
.expense-bar-item {
  display: grid;
  grid-template-columns: 120px 1fr 70px;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: 0.8rem;
}
.expense-bar-item .bar-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-secondary);
}
.expense-bar-item .bar-track {
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
}
.expense-bar-item .bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease-out;
}
.expense-bar-item .bar-value {
  text-align: right;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ─── Month Nav ─── */
.month-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 18px;
}
.month-nav .nav-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}
.month-nav .nav-btn:active { border-color: var(--accent); color: var(--accent); }
.month-nav .month-label {
  font-size: 1rem;
  font-weight: 600;
  min-width: 180px;
  text-align: center;
}

/* ─── Loading ─── */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ═══ Responsive ═══ */

/* iPad landscape */
@media (min-width: 1024px) {
  .app-content { padding: 24px 40px; padding-bottom: calc(var(--tab-h) + var(--safe-bottom) + 24px); }
  .kpi-grid { grid-template-columns: repeat(4, 1fr); }
  .chart-container { height: 300px; }
}

/* iPad portrait */
@media (max-width: 1023px) and (min-width: 768px) {
  .two-col:not([style*="flex"]) { grid-template-columns: 1fr; }
}

/* Phone */
@media (max-width: 767px) {
  .app-content { padding: 14px; padding-bottom: calc(var(--tab-h) + var(--safe-bottom) + 14px); }
  .kpi-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .two-col { grid-template-columns: 1fr; }
  .day-row { grid-template-columns: 36px 1fr 72px; }
  .day-row .day-change { display: none; }
  .expense-bar-item { grid-template-columns: 90px 1fr 60px; }
  .saldo-info .saldo-amount { font-size: 1.5rem; }
}