/* =========================
   Decision Friction Engine
   UI Foundation + Full App Styling
   Calm blue theme, local-first
   ========================= */

:root {
  --bg-primary: #f8fafc;
  --bg-card: #ffffff;
  --border-subtle: #e2e8f0;

  --text-primary: #0f172a;
  --text-secondary: #475569;

  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.12);

  --success: #15803d;
  --danger: #b91c1c;
  --danger-soft: rgba(185, 28, 28, 0.10);

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;

  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.10);

  --font-base: 16px;
}

/* Base */
* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--font-base);
  line-height: 1.35;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Arial, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.app-container {
  max-width: 1040px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.container { width: 100%; }

/* Header */
header {
  margin-bottom: var(--space-lg);
}

header h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 6px 0 0 0;
  color: var(--text-secondary);
}

/* Tabs */
.tab-bar {
  display: flex;
  gap: var(--space-sm);
  margin: var(--space-lg) 0 var(--space-lg) 0;
  padding: 6px;
  background: rgba(226, 232, 240, 0.60);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  width: fit-content;
}

.tab-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 650;
  font-size: 14px;
}

.tab-btn:hover {
  background: rgba(255,255,255,0.75);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-subtle);
}

/* Views */
.view { margin-top: var(--space-lg); }
.hidden { display: none !important; }

/* Card system */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.section-title {
  margin: 0 0 var(--space-md) 0;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.card-title {
  margin: 0 0 var(--space-md) 0;
  font-size: 16px;
  letter-spacing: -0.01em;
}

/* Form sections */
.form-section {
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border-subtle);
}

.form-section:first-child {
  border-top: none;
  padding-top: 0;
}

.form-section-title {
  margin: 0 0 var(--space-md) 0;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.form-group { margin-bottom: var(--space-md); }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

@media (max-width: 720px) {
  .form-row { grid-template-columns: 1fr; }
  .app-container { padding: var(--space-lg); }
  .tab-bar { width: 100%; justify-content: space-between; }
}

/* Labels + hints */
label {
  display: block;
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 6px;
}

.required-hint {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 12px;
}

/* Inputs */
input[type="text"],
input[type="number"],
input[type="date"],
textarea,
select {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  font-size: 15px;
  background: white;
  color: var(--text-primary);
}

textarea { min-height: 96px; resize: vertical; }

input::placeholder,
textarea::placeholder { color: rgba(71,85,105,0.75); }

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

/* Field errors */
.field-error {
  display: block;
  margin-top: 6px;
  color: var(--danger);
  font-size: 12px;
  font-weight: 650;
}

/* Slider groups */
.slider-group {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.slider {
  width: 100%;
}

.slider-value {
  min-width: 56px;
  text-align: right;
  font-weight: 800;
  color: var(--text-primary);
}

.slider-label-text {
  display: block;
  margin-top: 6px;
  color: var(--text-secondary);
  font-size: 12px;
}

/* Buttons */
.btn {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: 750;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-lg { padding: 12px 16px; }

.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: rgba(226,232,240,0.85);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}
.btn-secondary:hover { filter: brightness(0.985); }

.btn-back { margin-bottom: var(--space-md); }

.btn-add-row {
  margin-top: var(--space-sm);
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-subtle);
  background: rgba(248,250,252,0.9);
  color: var(--text-primary);
  cursor: pointer;
  font-weight: 700;
}
.btn-add-row:hover {
  border-color: rgba(37,99,235,0.45);
  background: rgba(37,99,235,0.06);
}

/* Form actions */
.form-actions {
  margin-top: var(--space-md);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

/* Filters bar */
.filters-bar {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

@media (max-width: 900px) {
  .filters-bar { grid-template-columns: 1fr; }
}

.search-input {
  width: 100%;
}

/* Entry detail / actions */
.detail-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

@media (max-width: 900px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .stats-row { grid-template-columns: 1fr; }
}

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

.stat-number {
  display: block;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  margin-top: 6px;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 650;
}

/* Tables */
.table-responsive { width: 100%; overflow-x: auto; }

.cal-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.cal-table th,
.cal-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 13px;
}

.cal-table th {
  background: rgba(248,250,252,0.9);
  text-align: left;
  color: var(--text-secondary);
  font-weight: 800;
}

.cal-table tr:last-child td { border-bottom: none; }

/* Chart container */
.chart-container {
  width: 100%;
  min-height: 260px;
}

/* Tooltip trigger */
.label-with-tooltip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.tooltip-trigger {
  width: 22px;
  height: 22px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: rgba(248,250,252,0.9);
  cursor: pointer;
  font-weight: 900;
  color: var(--text-secondary);
}

.tooltip-trigger:hover {
  border-color: rgba(37,99,235,0.45);
  color: var(--text-primary);
}

/* Utility */
.helper {
  margin: var(--space-xs) 0 0 0;
  color: var(--text-secondary);
  font-size: 13px;
}