/* ─── Imports ─────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;1,400&family=Lora:ital,wght@0,400;0,500;1,400&display=swap');

/* ─── Tokens ───────────────────────────────────────────────── */
:root {
  --ink:        #1a1612;
  --ink-soft:   #5a4f45;
  --ink-faint:  #7a6f64;
  --paper:      #faf7f2;
  --paper-warm: #f2ece2;
  --paper-mid:  #e8dfd0;
  --accent:     #a84f2e;
  --accent-dim: #d4846a;
  --rule:       rgba(26,22,18,0.12);

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Lora', Georgia, serif;

  --radius-card: 3px;
  --shadow-card: 0 1px 3px rgba(26,22,18,0.08), 0 4px 16px rgba(26,22,18,0.06);
  --shadow-hover: 0 2px 8px rgba(26,22,18,0.12), 0 8px 32px rgba(26,22,18,0.10);

  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* System-preference dark mode — suppressed when user explicitly chose light */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink:        #f0ece4;
    --ink-soft:   #b8b0a4;
    --ink-faint:  #8a8278;
    --paper:      #1a1714;
    --paper-warm: #211e1a;
    --paper-mid:  #2c2824;
    --accent:     #d4846a;
    --accent-dim: #b85c38;
    --rule:       rgba(240,236,228,0.10);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
    --shadow-hover: 0 2px 8px rgba(0,0,0,0.4), 0 8px 32px rgba(0,0,0,0.3);
  }
}

/* Explicit dark override — applies regardless of system preference */
:root[data-theme="dark"] {
  --ink:        #f0ece4;
  --ink-soft:   #b8b0a4;
  --ink-faint:  #8a8278;
  --paper:      #1a1714;
  --paper-warm: #211e1a;
  --paper-mid:  #2c2824;
  --accent:     #d4846a;
  --accent-dim: #b85c38;
  --rule:       rgba(240,236,228,0.10);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
  --shadow-hover: 0 2px 8px rgba(0,0,0,0.4), 0 8px 32px rgba(0,0,0,0.3);
}

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

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .mode-view.active  { animation: none; }
  .mode-card         { transition: none; }
  .mode-card::before,
  .mode-card-arrow   { transition: none; }
  /* word_soup.css per-slot transitions */
  .slot,
  .slot-label,
  .slot-lock-btn     { transition: none; }
  /* shared constraint badge fade */
  .constraint-badge  { transition: none; }
}

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

body {
  font-family: var(--font-body);
  background-color: var(--paper);
  color: var(--ink);
  min-height: 100vh;
  line-height: 1.7;
}

/* ─── Layout ───────────────────────────────────────────────── */
.site-header {
  padding: 3rem 2rem 2rem;
  text-align: center;
  border-bottom: 1px solid var(--rule);
  position: relative;
}

.theme-btn {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  background: none;
  border: 1px solid var(--rule);
  padding: 0.3rem 0.7rem;
  border-radius: 2px;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.theme-btn:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
}

.site-header::after {
  content: '';
  display: block;
  width: 48px;
  height: 2px;
  background: var(--accent);
  margin: 1.5rem auto 0;
}

.site-ornament {
  font-size: 0.7rem;
  color: var(--accent-dim);
  letter-spacing: 0.4em;
  margin-bottom: 1.25rem;
}

.site-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.15;
}

.site-title em {
  font-style: italic;
  color: var(--accent);
}

.site-tagline {
  margin-top: 0.75rem;
  font-size: 1rem;
  color: var(--ink-soft);
  font-style: italic;
  letter-spacing: 0.01em;
}

.site-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

/* ─── Global Toggles Bar ───────────────────────────────────── */
.global-toggles {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.toggle-btn {
  font-family: var(--font-body);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: none;
  border: 1px solid var(--rule);
  padding: 0.4rem 0.9rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition);
}

.toggle-btn:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}

.toggle-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--paper);
}

/* ─── Mode Cards Grid ──────────────────────────────────────── */
.section-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.5rem;
}

.modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.mode-card {
  width: 100%;
  text-align: left;
  font-family: inherit;
  font-size: inherit;
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  padding: 2rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
}

.mode-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition);
}

.mode-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: var(--paper-mid);
}

.mode-card:hover::before {
  transform: scaleY(1);
}

.mode-card-number {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.mode-card-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  color: var(--ink);
}

.mode-card-desc {
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

.mode-card-arrow {
  position: absolute;
  bottom: 1.5rem;
  right: 1.75rem;
  font-size: 1.1rem;
  color: var(--accent-dim);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--transition), transform var(--transition);
}

.mode-card:hover .mode-card-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ─── Mode View (single mode open) ────────────────────────── */
.mode-view {
  display: none;
}

.mode-view.active {
  display: block;
  animation: fadeUp 300ms ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.mode-view-header {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}

.back-btn {
  font-family: var(--font-body);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

.back-btn:hover { color: var(--accent); }

.mode-view-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 400;
  color: var(--ink);
}

/* ─── Prompt Display ───────────────────────────────────────── */
.prompt-area {
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  padding: 2.5rem 3rem;
  margin-bottom: 1.5rem;
  min-height: 140px;
  display: flex;
  align-items: center;
}

.prompt-text {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 400;
  line-height: 1.55;
  color: var(--ink);
  font-style: normal;
}

.prompt-text.empty {
  color: var(--ink-faint);
  font-style: normal;
  font-size: 1rem;
  font-family: var(--font-body);
}

.constraint-badge {
  display: inline-flex;
  align-items: center;
  align-self: center;
  margin-top: 0;
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 0.25rem 0.65rem;
  border-radius: 2px;
  opacity: 0;
  transition: opacity var(--transition);
  /* prevent empty badge from affecting row height */
  min-height: 0;
  overflow: hidden;
  max-width: 0;
  padding-left: 0;
  padding-right: 0;
  border-width: 0;
}

.constraint-badge.visible {
  opacity: 1;
  max-width: 600px;
  padding: 0.25rem 0.65rem;
  border-width: 1px;
}

/* ─── Controls ─────────────────────────────────────────────── */
.controls {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

.btn-primary {
  font-family: var(--font-body);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  padding: 0.65rem 1.5rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition);
}

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

.btn-secondary {
  font-family: var(--font-body);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  background: none;
  color: var(--ink-soft);
  border: 1px solid var(--rule);
  padding: 0.65rem 1.25rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-secondary:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
}

/* ─── Timer ────────────────────────────────────────────────── */
.timer-display {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink-soft);
  margin-left: auto;
  letter-spacing: 0.05em;
}

.timer-display.urgent { color: var(--accent); }

/* ─── Error note ───────────────────────────────────────────── */
.error-note {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-style: italic;
  color: var(--ink-soft);
  margin-top: 1rem;
  padding-left: 0.75rem;
  border-left: 2px solid var(--accent);
}

/* ─── No-JS notice ─────────────────────────────────────────── */
.noscript-notice {
  text-align: center;
  padding: 4rem 2rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-style: italic;
  color: var(--ink-soft);
}

/* ─── Footer ───────────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--rule);
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
}

.footer-tagline {
  font-style: italic;
  margin-bottom: 0.6rem;
}

.footer-meta {
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.footer-link {
  color: var(--ink-faint);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--rule);
  transition: color var(--transition), text-decoration-color var(--transition);
}

.footer-link:hover {
  color: var(--accent);
  text-decoration-color: var(--accent-dim);
}

/* ─── Write to a Reader ─────────────────────────────────── */

.reader-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.5rem;
}

.reader-persona {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.75rem);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.3;
}

.reader-context {
  display: block;
  margin-top: 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--ink-soft);
  line-height: 1.6;
}