/* ============================================================
   CSS custom properties — light theme (default)
   ============================================================ */
:root {
  --bg-page:       #f5f5f5;
  --bg-panel:      #ffffff;
  --bg-sidebar:    #ffffff;
  --bg-card:       #ffffff;
  --bg-input:      #ffffff;
  --bg-th:         #f8fafc;
  --bg-ris-item:   #f8fafc;
  --bg-topbar:     #1e293b;
  --bg-topbar-btn: #334155;
  --bg-topbar-btn-hover: #475569;

  --border:        #e2e8f0;
  --border-input:  #d1d5db;

  --text-body:     #1a1a1a;
  --text-label:    #374151;
  --text-muted:    #64748b;
  --text-heading:  #374151;
  --text-value:    #1e293b;
  --text-topbar:   #e2e8f0;
  --text-topbar-dim: #94a3b8;
  --text-link:     #3b82f6;

  --accent:        #3b82f6;
  --accent-hover:  #2563eb;
  --accent-dim:    #93c5fd;

  --tr-retirement: #eff6ff;
  --tr-fire:       #f0fdf4;
  --tr-depletion:  #fef2f2;

  --banner-info-bg:     #eff6ff;
  --banner-info-border: #bfdbfe;
  --banner-info-text:   #1e40af;
  --banner-warn-bg:     #fffbeb;
  --banner-warn-border: #fde68a;
  --banner-warn-text:   #92400e;

  --shadow-modal:  rgba(0,0,0,0.2);
  --overlay-bg:    rgba(0,0,0,0.4);
}

/* ============================================================
   Dark theme overrides
   ============================================================ */
[data-theme="dark"] {
  --bg-page:       #0f172a;
  --bg-panel:      #1e293b;
  --bg-sidebar:    #1e293b;
  --bg-card:       #1e293b;
  --bg-input:      #0f172a;
  --bg-th:         #243044;
  --bg-ris-item:   #243044;
  --bg-topbar:     #0f172a;
  --bg-topbar-btn: #1e293b;
  --bg-topbar-btn-hover: #334155;

  --border:        #334155;
  --border-input:  #475569;

  --text-body:     #e2e8f0;
  --text-label:    #e2e8f0;
  --text-muted:    #94a3b8;
  --text-heading:  #94a3b8;
  --text-value:    #f1f5f9;
  --text-topbar:   #e2e8f0;
  --text-topbar-dim: #64748b;
  --text-link:     #60a5fa;

  --accent:        #3b82f6;
  --accent-hover:  #60a5fa;
  --accent-dim:    #1d4ed8;

  --tr-retirement: #1e3a5f;
  --tr-fire:       #14532d;
  --tr-depletion:  #450a0a;

  --banner-info-bg:     #1e3a5f;
  --banner-info-border: #1d4ed8;
  --banner-info-text:   #93c5fd;
  --banner-warn-bg:     #422006;
  --banner-warn-border: #92400e;
  --banner-warn-text:   #fde68a;

  --shadow-modal:  rgba(0,0,0,0.6);
  --overlay-bg:    rgba(0,0,0,0.7);
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 14px;
  background: var(--bg-page);
  color: var(--text-body);
  height: 100vh;
  overflow: hidden;
  transition: background 0.15s, color 0.15s;
}

/* Layout */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

#scenario-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-topbar);
  color: var(--text-topbar);
  flex-shrink: 0;
}

.sb-primary {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sb-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
}

#scenario-bar select {
  background: var(--bg-topbar-btn);
  color: var(--text-topbar);
  border: 1px solid var(--bg-topbar-btn-hover);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 13px;
}

#scenario-bar button {
  background: var(--bg-topbar-btn);
  color: var(--text-topbar);
  border: 1px solid var(--bg-topbar-btn-hover);
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 13px;
}
#scenario-bar button:hover { background: var(--bg-topbar-btn-hover); }
#scenario-bar button:disabled { opacity: 0.4; cursor: default; }


#btn-share.copied {
  background: #16a34a;
  border-color: #16a34a;
  color: #fff;
}

#btn-theme {
  font-size: 20px;
  width: 36px;
  line-height: 1.2;
  text-align: center;
  padding: 1px 0;
  flex-shrink: 0;
}

#how-it-works-link {
  color: var(--text-topbar-dim);
  font-size: 12px;
  text-decoration: none;
  padding: 4px 6px;
  border-radius: 4px;
  white-space: nowrap;
}
#how-it-works-link:hover {
  color: var(--text-topbar);
  background: var(--bg-topbar-btn);
}

#main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar inputs */
#sidebar {
  width: 300px;
  flex-shrink: 0;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px;
}

#sidebar h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-heading);
  margin: 16px 0 6px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
}
#sidebar h2:first-child { margin-top: 0; }

/* Input groups */
.input-group {
  margin-bottom: 10px;
}

.input-group label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-label);
  margin-bottom: 3px;
}

.input-group label span.val {
  font-weight: 600;
  color: var(--text-value);
  min-width: 60px;
  text-align: right;
}

.input-group input[type="range"] {
  width: 100%;
  height: 4px;
  cursor: pointer;
  accent-color: var(--accent);
}

.input-group input[type="text"],
.input-group select {
  width: 100%;
  padding: 5px 8px;
  border: 1px solid var(--border-input);
  border-radius: 4px;
  font-size: 13px;
  background: var(--bg-input);
  color: var(--text-body);
}

.input-group input[type="text"]:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(59,130,246,0.15);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-label);
}

/* Dynamic lists (one-time expenses, income streams) */
.list-section {
  margin-bottom: 10px;
}

.list-toggle {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-link);
  background: none;
  border: none;
  padding: 2px 0;
}

.list-items { display: none; margin-top: 6px; }
.list-items.open { display: block; }

.list-item {
  display: flex;
  gap: 4px;
  align-items: center;
  margin-bottom: 4px;
  font-size: 12px;
}
.list-item input {
  flex: 1; min-width: 0; padding: 3px 5px;
  border: 1px solid var(--border-input); border-radius: 3px;
  background: var(--bg-input); color: var(--text-body);
}
.list-item button, .ris-item button {
  background: none; border: none; cursor: pointer;
  color: #ef4444; font-size: 16px; line-height: 1; padding: 4px 6px; flex-shrink: 0;
  min-width: 28px; min-height: 28px;
}

/* Two-line layout for income streams */
.ris-item {
  margin-bottom: 6px;
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 6px;
  background: var(--bg-ris-item);
}
.ris-row1 {
  display: flex;
  gap: 4px;
  align-items: center;
  margin-bottom: 4px;
}
.ris-row1 .ris-amount {
  flex: 1; min-width: 0; padding: 3px 5px;
  border: 1px solid var(--border-input); border-radius: 3px;
  background: var(--bg-input); color: var(--text-body);
}
.ris-row2 {
  display: flex;
  gap: 6px;
  align-items: center;
}
.ris-row2 label {
  display: flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}
.ris-age {
  width: 36px; padding: 3px 4px;
  border: 1px solid var(--border-input); border-radius: 3px;
  text-align: center; background: var(--bg-input); color: var(--text-body);
}
.ris-label {
  flex: 1; min-width: 0; padding: 3px 5px;
  border: 1px solid var(--border-input); border-radius: 3px;
  background: var(--bg-input); color: var(--text-body);
}

.add-row-btn {
  font-size: 12px; color: var(--text-link); background: none; border: none;
  cursor: pointer; padding: 2px 0; display: flex; align-items: center; gap: 4px;
}

/* Output panel */
#output {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 12px;
  gap: 10px;
}

/* Metrics row */
#metrics {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  flex: 1;
}

.metric-card .label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.metric-card .value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-value);
  margin-top: 2px;
}

.metric-card .value.good { color: #16a34a; }
.metric-card .value.warn { color: #d97706; }
.metric-card .value.bad  { color: #dc2626; }

/* Info/warning banners */
.banner {
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  display: none;
}
.banner.info    { background: var(--banner-info-bg);  border: 1px solid var(--banner-info-border);  color: var(--banner-info-text);  display: block; }
.banner.warning { background: var(--banner-warn-bg); border: 1px solid var(--banner-warn-border); color: var(--banner-warn-text); display: block; }

/* Error banner (validation, API errors) */
.error-banner {
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 6px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  color: #9a3412;
}
[data-theme="dark"] .error-banner {
  background: #431407;
  border-color: #9a3412;
  color: #fdba74;
}

/* Help tooltip markers */
.help {
  font-size: 0.82em;
  color: var(--text-muted);
  cursor: help;
  font-weight: normal;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.tab-btn {
  padding: 6px 14px;
  font-size: 13px;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.tab-panel { display: none; flex: 1; overflow: auto; }
.tab-panel.active { display: flex; flex-direction: column; }

#chart-nominal, #chart-real { width: 100%; flex: 1; min-height: 0; }

/* Year-by-year table */
#table-container {
  overflow: auto;
  flex: 1;
}

#detail-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

#detail-table th {
  position: sticky;
  top: 0;
  background: var(--bg-th);
  border-bottom: 2px solid var(--border);
  padding: 6px 10px;
  text-align: right;
  white-space: nowrap;
  font-weight: 600;
  color: var(--text-heading);
}
#detail-table th:first-child { text-align: center; }

#detail-table td {
  padding: 4px 10px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  color: var(--text-label);
}
#detail-table td:first-child { text-align: center; font-weight: 600; }

#detail-table tr.retirement-row td { background: var(--tr-retirement); }
#detail-table tr.fire-row td       { background: var(--tr-fire); }
#detail-table tr.depletion-row td  { background: var(--tr-depletion); }

/* Monte Carlo section */
#mc-section {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  flex-shrink: 0;
}
#mc-section button {
  background: var(--accent); color: #fff; border: none; border-radius: 4px;
  padding: 5px 14px; cursor: pointer; font-size: 13px;
}
#mc-section button:hover { background: var(--accent-hover); }
#mc-section button:disabled { background: var(--accent-dim); cursor: default; }
#mc-result { font-size: 13px; color: var(--text-label); }

/* Modal */
#modal-overlay {
  display: none;
  position: fixed; inset: 0;
  background: var(--overlay-bg);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
#modal-overlay.open { display: flex; }

#modal {
  background: var(--bg-panel);
  border-radius: 8px;
  padding: 24px;
  min-width: 320px;
  box-shadow: 0 20px 60px var(--shadow-modal);
  border: 1px solid var(--border);
}
#modal h3 { font-size: 16px; margin-bottom: 12px; color: var(--text-value); }
#modal input[type="text"] {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--border-input);
  border-radius: 4px;
  font-size: 14px;
  margin-bottom: 8px;
  background: var(--bg-input);
  color: var(--text-body);
}
#modal .modal-error { color: #dc2626; font-size: 12px; min-height: 16px; margin-bottom: 8px; }
#modal .modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 4px; }
#modal .modal-actions button {
  padding: 6px 14px; border-radius: 4px; cursor: pointer; font-size: 13px;
  border: 1px solid var(--border-input);
  background: var(--bg-input); color: var(--text-body);
}
#modal .modal-actions button.primary {
  background: var(--accent); color: #fff; border-color: var(--accent);
}

/* Sidebar footer */
.sidebar-footer {
  padding: 12px 0 4px;
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}

/* Savings summary (read-only derived total) */
.savings-summary {
  margin: 4px 0 10px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-card);
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}
.savings-summary #ss-total,
.savings-summary #ss-pct {
  color: var(--text-value);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.savings-summary.over { color: #d97706; border-color: #d97706; }

/* Loading state */
#output.is-loading .metric-card .value {
  opacity: 0.4;
}
#output.is-loading #chart-nominal,
#output.is-loading #chart-real {
  opacity: 0.5;
}

/* Scenario comparison */
#tab-compare { padding: 10px 2px; }
#compare-controls {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  margin-bottom: 12px;
  background: var(--bg-card);
}
.compare-help {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
#compare-checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-bottom: 10px;
}
#compare-checkboxes label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--text-label);
  cursor: pointer;
}
.compare-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
#btn-compare {
  background: var(--accent); color: #fff; border: none; border-radius: 4px;
  padding: 5px 14px; cursor: pointer; font-size: 13px;
}
#btn-compare:hover { background: var(--accent-hover); }
#btn-compare:disabled { background: var(--accent-dim); cursor: default; }
#compare-status { font-size: 12px; color: var(--text-muted); }
#compare-status.stale { color: #d97706; }

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.compare-table th, .compare-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  text-align: right;
}
.compare-table th {
  background: var(--bg-th);
  color: var(--text-heading);
  font-weight: 600;
  white-space: nowrap;
}
.compare-table th:first-child,
.compare-table td:first-child {
  text-align: left;
  position: sticky;
  left: 0;
  background: var(--bg-th);
  font-weight: 600;
  color: var(--text-label);
}
.compare-table td.winner {
  color: #16a34a;
  font-weight: 700;
}

/* ============================================================
   Mobile / narrow viewport (≤ 700px)
   ============================================================ */
@media (max-width: 700px) {
  body {
    height: auto;
    overflow: auto;
  }

  #app {
    height: auto;
    min-height: 100vh;
  }

  #scenario-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 8px 10px;
  }

  .sb-primary {
    gap: 8px;
  }

  .sb-primary #scenario-select {
    flex: 1;
    min-width: 0;
    font-size: 14px;
    padding: 5px 8px;
  }

  .sb-actions {
    gap: 5px;
    flex-wrap: wrap;
  }

  .sb-actions button {
    padding: 3px 8px;
    font-size: 12px;
  }

  #how-it-works-link {
    font-size: 11px;
  }

  #main {
    flex-direction: column;
    overflow: visible;
  }

  #sidebar {
    width: 100%;
    overflow: visible;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 12px 12px 6px;
  }

  #output {
    overflow: visible;
    padding: 10px 10px 20px;
  }

  #metrics {
    flex-wrap: wrap;
  }

  .metric-card {
    flex: 1 1 calc(50% - 5px);
    min-width: 0;
  }

  .metric-card .value {
    font-size: 16px;
  }

  #chart-nominal,
  #chart-real {
    min-height: 280px;
    flex: none;
    height: 280px;
  }

  .tab-panel.active {
    display: block;
  }

  #table-container {
    overflow-x: auto;
  }
}

@media (max-width: 500px) {
  .sb-actions button {
    padding: 2px 6px;
    font-size: 11px;
  }

  #how-it-works-link {
    font-size: 10px;
  }
}