/**
 * Paceline — Base Styles
 * Option 3C "Stealth Signal" — dark-first, Inter + JetBrains Mono
 */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-navy-deep);
  min-height: 100vh;
}

/* ─── Typography ──────────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
}

h1 { font-size: var(--text-xl); }
h2 { font-size: var(--text-lg); }
h3 { font-size: var(--text-md); }
h4 { font-size: var(--text-base); font-weight: var(--weight-semibold); }

/* Metric values — tabular alignment */
.metric-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: var(--tracking-tight);
}

/* Section eyebrow labels — all-caps wide-tracked */
.eyebrow {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

/* ─── Links ───────────────────────────────────────────────────────────────── */
a {
  color: var(--color-amber);
  text-decoration: none;
}

a:hover {
  color: var(--color-amber-glow);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ─── Focus ───────────────────────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 2px;
}

/* ─── Tables ──────────────────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-navy-border);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  background: var(--color-navy-surface);
  position: sticky;
  top: 0;
  z-index: var(--z-raised);
}

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-navy-border);
  vertical-align: middle;
  font-size: var(--text-sm);
  height: var(--table-row-height);
}

/* Metric columns right-align */
td.col-metric, th.col-metric {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

tr:hover td {
  background-color: var(--color-navy-surface);
}

/* ─── Buttons (base) ──────────────────────────────────────────────────────── */
button {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  font-size: var(--text-sm);
  cursor: pointer;
  border: none;
  border-radius: var(--radius-sm);
  height: 36px;
  padding: 0 var(--space-4);
  transition: all var(--transition-fast);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ─── Form Elements ───────────────────────────────────────────────────────── */
input, select, textarea {
  font-family: var(--font-body);
  font-size: var(--text-base);
  height: 38px;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-navy-border);
  border-radius: var(--radius-sm);
  background: var(--color-navy-surface);
  color: var(--color-text-primary);
  width: 100%;
  transition: border-color var(--transition-fast);
}

textarea {
  height: auto;
  padding: var(--space-3);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-amber);
  box-shadow: 0 0 0 3px rgba(196, 119, 0, 0.2);
}

input::placeholder, textarea::placeholder {
  color: var(--color-text-disabled);
}

label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

/* ─── Utility ─────────────────────────────────────────────────────────────── */
[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ─── Scrollbar (dark) ────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-navy-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--color-slate-dark);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-slate-mid);
}

/* ─── Reduced Motion ──────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE — Mobile-first cascade (Spec V1.0 §1)
   Tiers: mobile (default, < 640px) → tablet (≥ 640px) → desktop (≥ 1024px)
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Type Scale Floors (Spec §2) ────────────────────────────────────────── */
/* Body text: never below 14px. Mono/data: never below 13px.               */
body { font-size: max(var(--text-base), 14px); }

.metric-value,
.metric__value,
td.col-metric,
[style*="font-family: var(--font-mono)"] {
  font-size: max(var(--text-sm), 13px);
}

/* ─── No Horizontal Scroll at Page Level (Spec §2) ───────────────────────── */
html, body { overflow-x: hidden; }

/* ─── Mobile defaults (< 640px) ──────────────────────────────────────────── */
/* Note: .top-bar, .nav-btn, .main-content, .card mobile defaults are in
   components.css (mobile-first base). Only layout/grid rules here.        */

/* Typography: tighter headings on small screens */
h1 { font-size: var(--text-lg); }
h2 { font-size: var(--text-md); }

/* Morning brief cards: horizontal scroll */
.morning-brief__cards {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  flex-wrap: nowrap;
  padding-bottom: var(--space-2);
}

.morning-brief__card {
  min-width: 220px;
  flex-shrink: 0;
}

/* Portfolio table: card-collapse on mobile only (Spec §3) */
@media (max-width: 639px) {
  .data-grid thead {
    display: none;
  }

  .data-grid tbody tr {
    display: flex;
    flex-direction: column;
    padding: var(--space-3);
    border-bottom: 1px solid var(--color-navy-border);
    gap: var(--space-1);
    cursor: pointer;
  }

  .data-grid tbody td {
    padding: var(--space-1) 0;
    border-bottom: none;
    height: auto;
    display: flex;
    justify-content: space-between;
  }

  .data-grid tbody td::before {
    content: attr(data-label);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }
}

/* Form rows: stack */
.form-row {
  flex-direction: column;
  gap: var(--space-3);
}

/* Two-column grids: stack to single column on mobile only */
@media (max-width: 639px) {
  [style*="grid-template-columns: 1fr 1fr"] {
    display: flex !important;
    flex-direction: column;
    gap: var(--space-4);
  }
}

/* Metric summary row: wrap */
[style*="display: flex"][style*="gap: var(--space-8)"] {
  flex-wrap: wrap;
  gap: var(--space-4) !important;
}

/* Signal evidence panel: single column on mobile only */
@media (max-width: 639px) {
  .signal-evidence-panel {
    grid-template-columns: 1fr;
    padding: var(--space-3);
  }
}

.evidence-card {
  padding: var(--space-3);
}

/* Signal rows: more padding for touch */
.signal-row {
  padding: var(--space-3);
  min-height: 48px;
}

/* Buttons: full width on mobile only */
@media (max-width: 639px) {
  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

/* S-curve chart: allow scroll on tiny screens */
#chart-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Demo switch: hide text, keep icon */
#demo-switch-btn {
  font-size: 0;
}
#demo-switch-btn::before {
  content: '⇄';
  font-size: var(--text-base);
}

/* User area: compact */
.user-name { display: none; }

/* Export button: compact */
#export-data-btn { font-size: 16px; padding: 0 8px; }


/* ─── Tablet (≥ 640px) ───────────────────────────────────────────────────── */
@media (min-width: 640px) {
  /* Restore headings */
  h1 { font-size: var(--text-xl); }
  h2 { font-size: var(--text-lg); }

  /* Portfolio table: tablet 2-column card grid */
  .data-grid thead {
    display: none;
  }

  .data-grid tbody {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .data-grid tbody tr {
    display: flex;
    flex-direction: column;
    padding: var(--space-4);
    border: 1px solid var(--color-navy-border);
    border-radius: var(--radius-md);
    gap: var(--space-1);
  }

  /* Buttons: auto width */
  .btn-primary, .btn-secondary {
    width: auto;
  }

  /* User area: show name */
  .user-name { display: inline; }

  /* Demo switch: show text */
  #demo-switch-btn { font-size: var(--text-xs); }
  #demo-switch-btn::before { content: ''; }

  /* Export button: restore */
  #export-data-btn { font-size: var(--text-sm); padding: 0 var(--space-3); }
}


/* ─── Desktop (≥ 1024px) ─────────────────────────────────────────────────── */
@media (min-width: 1024px) {
  /* Portfolio table: restore full table layout */
  .data-grid thead {
    display: table-header-group;
  }

  .data-grid tbody {
    display: table-row-group;
  }

  .data-grid tbody tr {
    display: table-row;
    padding: 0;
    border: none;
    border-radius: 0;
    gap: 0;
  }

  .data-grid tbody td {
    display: table-cell;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-navy-border);
    height: var(--table-row-height);
    justify-content: unset;
  }

  .data-grid tbody td::before {
    content: none;
  }

  /* Form rows: restore grid */
  .form-row {
    flex-direction: row;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
  }

  /* Signal evidence panel: two columns */
  .signal-evidence-panel {
    grid-template-columns: 1fr 1fr;
    padding: var(--space-4);
  }

  /* Signal rows: desktop padding */
  .signal-row {
    padding: var(--space-3) var(--space-4);
  }
}


/* ─── Touch Targets (Spec §2: 44×44px floor) ─────────────────────────────── */
@media (pointer: coarse) {
  button, .nav-btn, .signal-row {
    min-height: 44px;
  }

  input, select {
    height: 44px;
  }
}

/* ─── Safe Areas (Spec §2: notched devices) ──────────────────────────────── */
@supports (padding: env(safe-area-inset-bottom)) {
  .top-bar {
    padding-left: max(var(--space-3), env(safe-area-inset-left));
    padding-right: max(var(--space-3), env(safe-area-inset-right));
  }

  .main-content {
    padding-bottom: env(safe-area-inset-bottom);
  }
}