/* ============================================================
   Family Budget Tool - Styles
   ============================================================ */

:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --success-light: #22c55e;
  --danger: #dc2626;
  --danger-light: #ef4444;
  --warning: #f59e0b;
  --warning-light: #fbbf24;
  --info: #06b6d4;

  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-sidebar: #1e293b;
  --bg-input: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-sidebar: #cbd5e1;
  --text-sidebar-active: #ffffff;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-sidebar: #0f172a;
  --bg-input: #334155;
  --border: #334155;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---- Layout ---- */

.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  background: var(--bg-sidebar);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-header {
  padding: 24px 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-header h1 span {
  font-size: 1.5rem;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  font-size: 0.9rem;
  border: none;
  background: none;
  color: var(--text-sidebar);
  width: 100%;
  text-align: left;
}

.nav-item:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
}

.nav-item.active {
  background: rgba(37, 99, 235, 0.3);
  color: var(--text-sidebar-active);
  font-weight: 600;
  border-right: 3px solid var(--primary-light);
}

.nav-item .nav-icon {
  font-size: 1.2rem;
  width: 28px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-footer button {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: none;
  background: rgba(255,255,255,0.08);
  color: var(--text-sidebar);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  transition: background var(--transition);
}

.sidebar-footer button:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

/* Main content */

.main {
  flex: 1;
  margin-left: 260px;
  padding: 24px 32px;
  min-height: 100vh;
}

.page {
  display: none;
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.page-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

/* ---- Cards ---- */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.card-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.stat-card .stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.stat-card .stat-value.positive { color: var(--success); }
.stat-card .stat-value.negative { color: var(--danger); }
.stat-card .stat-icon {
  font-size: 2rem;
  float: right;
  opacity: 0.3;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }

.btn-success {
  background: var(--success);
  color: #fff;
}
.btn-success:hover { background: #15803d; }

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: #b91c1c; }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { background: var(--border); }

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
}

.btn-icon {
  padding: 6px 8px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 1rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.btn-icon:hover { background: var(--border); color: var(--text); }

.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ---- Forms ---- */

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 4px;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  background: var(--bg-input);
  color: var(--text);
  transition: border-color var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-check {
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

/* ---- Tables ---- */

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg);
  position: sticky;
  top: 0;
}

[data-theme="dark"] th {
  background: var(--bg-card);
}

tr:hover td {
  background: rgba(37, 99, 235, 0.04);
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-recurring {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
}

.badge-one-time {
  background: rgba(100, 116, 139, 0.1);
  color: var(--text-secondary);
}

.badge-priority-high {
  background: rgba(220, 38, 38, 0.1);
  color: var(--danger);
}

.badge-priority-medium {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}

.badge-priority-low {
  background: rgba(22, 163, 74, 0.1);
  color: var(--success);
}

.category-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}

/* ---- Modal ---- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 90%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform 0.2s ease;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0;
  line-height: 1;
}

.modal-close:hover { color: var(--text); }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ---- Toast ---- */

.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
  max-width: 360px;
}

.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--primary); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ---- Filters Bar ---- */

.filters-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.filters-bar .form-control {
  width: auto;
  min-width: 160px;
}

/* ---- Progress bar ---- */

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 8px;
}

.progress-bar .progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
}

/* ---- Amortization ---- */

.amort-table {
  max-height: 400px;
  overflow-y: auto;
}

/* ---- Chart containers ---- */

.chart-container {
  position: relative;
  width: 100%;
  padding: 16px 0;
}

.chart-container canvas {
  width: 100%;
  height: 280px;
}

/* ---- Empty state ---- */

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-secondary);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.4;
}

.empty-state p {
  margin-bottom: 16px;
}

/* ---- Mobile hamburger ---- */

.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 1.2rem;
  cursor: pointer;
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .mobile-menu-btn {
    display: block;
  }
  .main {
    margin-left: 0;
    padding: 60px 16px 24px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* ---- Scrollbar ---- */

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ---- Color swatches for category edit ---- */

.color-options {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid transparent;
  transition: border-color var(--transition);
}

.color-swatch:hover, .color-swatch.selected {
  border-color: var(--text);
}

/* ---- Member color dot ---- */

.member-color {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}

/* ---- Loan calculator ---- */

.calculator-card {
  background: rgba(37, 99, 235, 0.05);
  border: 1px dashed var(--primary);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.calculator-result {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  margin-top: 12px;
}

/* ---- Timeline ---- */

.timeline-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.timeline-date {
  min-width: 80px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.timeline-content {
  flex: 1;
}

.timeline-content h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-content p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Dark mode toggle style */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
}