/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --bg:             #f8f6f1;
  --surface:        #ffffff;
  --surface-warm:   #fdf8f2;
  --border:         #e2ddd6;
  --border-warm:    #d4c4b0;
  --text-primary:   #1c1917;
  --text-secondary: #6b6560;
  --text-tertiary:  #9c9590;
  --accent:         #3d2b1f;
  --accent-hover:   #5a3f2e;
  --accent-mid:     #7c5c3a;
  --selected-bg:    #3d2b1f;
  --selected-text:  #ffffff;
  --disabled-bg:    #f0ede8;
  --disabled-text:  #b0aba5;
  --progress-bg:    #e2ddd6;
  --progress-fill:  #3d2b1f;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --font-body: 'Georgia', 'Times New Roman', serif;
  --font-ui:   system-ui, -apple-system, 'Segoe UI', sans-serif;

  --max-width:  640px;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

button {
  font-family: var(--font-ui);
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================================
   LAYOUT WRAPPER
   ============================================================ */
#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-sm);
}

.screen {
  width: 100%;
  max-width: var(--max-width);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-lg);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   LOADING SCREEN
   ============================================================ */
.loading-screen {
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-ui);
  color: var(--text-secondary);
  font-size: 14px;
  letter-spacing: 0.05em;
}

/* ============================================================
   PROGRESS BAR
   ============================================================ */
.progress-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-sm) 0 0;
}

.progress-track {
  height: 2px;
  background: var(--progress-bg);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--progress-fill);
  border-radius: 999px;
  transition: width 0.4s ease;
}

.progress-label {
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 7px;
}

/* ============================================================
   INTRO SCREEN
   ============================================================ */
.intro-screen {
  padding-top: var(--spacing-lg);
  gap: 0;
}

.intro-eyebrow {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}

.intro-title {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: normal;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.intro-body {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 460px;
  margin-bottom: var(--spacing-md);
}

.intro-meta {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-lg);
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.intro-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.intro-meta span::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-tertiary);
}

/* ============================================================
   QUESTION SCREEN
   ============================================================ */
.question-number {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 10px;
}

.question-text {
  font-size: clamp(20px, 4vw, 26px);
  font-weight: normal;
  line-height: 1.3;
  color: var(--text-primary);
}

.question-hint {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: -4px;
}

/* ============================================================
   ANSWER OPTIONS GRID
   ============================================================ */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--spacing-xs);
}

.option-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 13px 16px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.4;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.option-btn:hover:not(.disabled) {
  border-color: var(--accent-mid);
}

.option-btn.selected {
  background: var(--selected-bg);
  border-color: var(--selected-bg);
  color: var(--selected-text);
}

.option-btn.disabled {
  background: var(--disabled-bg);
  color: var(--disabled-text);
  border-color: var(--border);
  cursor: not-allowed;
}

/* Single-column layout for longer text options */
.options-grid.single-col {
  grid-template-columns: 1fr;
}

.options-grid.single-col .option-btn {
  font-size: 15px;
}

/* ============================================================
   NAVIGATION BAR
   ============================================================ */
.nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--border);
  margin-top: var(--spacing-xs);
}

.btn-back {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-tertiary);
  padding: 8px 0;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.15s;
  letter-spacing: 0.01em;
}

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

.btn-back.hidden {
  visibility: hidden;
  pointer-events: none;
}

.btn-next {
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  transition: background 0.15s, opacity 0.15s;
  letter-spacing: 0.01em;
}

.btn-next:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-next:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ============================================================
   START BUTTON
   ============================================================ */
.btn-start {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  padding: 13px 30px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
  align-self: flex-start;
  letter-spacing: 0.01em;
}

.btn-start:hover {
  background: var(--accent-hover);
}

/* ============================================================
   RESULTS SCREEN — LAYOUT
   ============================================================ */
.results-screen {
  gap: var(--spacing-lg);
}

/* ============================================================
   RESULTS HEADER
   ============================================================ */
.results-header {
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border);
}

.results-header__eyebrow {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

.results-header__title {
  font-size: clamp(24px, 4.5vw, 34px);
  font-weight: normal;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.results-header__summary {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.6;
}

.results-header__summary strong {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================================
   RESULTS SECTIONS
   ============================================================ */
.results-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.results-section-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.results-section-label {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.results-section-desc {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* ============================================================
   BOOK CARDS — PRIMARY
   ============================================================ */
.book-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
}

/* Top row: meta tags */
.book-card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.book-card__genre-pill {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(61, 43, 31, 0.07);
  border-radius: 999px;
  padding: 3px 10px;
  border: 1px solid rgba(61, 43, 31, 0.16);
}

.book-card__era {
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--text-tertiary);
}

/* Title and author */
.book-card__title {
  font-size: clamp(19px, 3.5vw, 23px);
  font-weight: normal;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 1px;
}

.book-card__author {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-secondary);
  font-style: normal;
  letter-spacing: 0.01em;
}

/* Tagline — the emotional hook */
.book-card__tagline {
  font-size: 15px;
  color: var(--text-secondary);
  font-style: italic;
  line-height: 1.6;
  padding-top: 2px;
}

/* Synopsis — the factual summary */
.book-card__synopsis {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.7;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

/* ============================================================
   BOOK CARDS — ROGUE PICK
   ============================================================ */
.book-card--rogue {
  background: var(--surface-warm);
  border-color: var(--border-warm);
  border-style: dashed;
  border-width: 1.5px;
}

.book-card--rogue .book-card__genre-pill {
  color: var(--accent-mid);
  background: rgba(124, 92, 58, 0.09);
  border-color: rgba(124, 92, 58, 0.22);
}

/* Rogue eyebrow — sits above the meta row */
.book-card__rogue-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.rogue-badge {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-mid);
  border: 1.5px solid var(--accent-mid);
  border-radius: 999px;
  padding: 3px 10px;
}

.rogue-eyebrow-note {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--text-tertiary);
  font-style: italic;
}

/* ============================================================
   SUBSTACK EMBED BLOCK
   ============================================================ */
.substack-block {
  background: #030616;
  border: 1px solid #986523;
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: center;
}

.substack-block__eyebrow {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #986523;
}

.substack-block__title {
  font-size: clamp(18px, 3vw, 22px);
  font-weight: normal;
  color: #FFFFFF;
  line-height: 1.3;
}

.substack-block__body {
  font-family: var(--font-ui);
  font-size: 14px;
  color: #E2E4EB;
  line-height: 1.65;
  max-width: 400px;
  margin: 0 auto;
}

.substack-block__embed {
  margin-top: 4px;
  display: flex;
  justify-content: center;
}

.substack-block__embed iframe {
  width: 100%;
  max-width: 480px;
  height: 320px;
  display: block;
  border: 1px solid rgba(152, 101, 35, 0.35) !important;
}

/* ============================================================
   EXPAND BUTTONS (show more / wildcard)
   ============================================================ */
.btn-expand {
  display: block;
  width: 100%;
  padding: 10px 16px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  margin-top: var(--spacing-sm);
  transition: border-color 0.15s, color 0.15s;
}
.btn-expand:hover {
  border-color: var(--accent-mid);
  color: var(--text-primary);
}
.btn-expand--rogue {
  background: var(--surface-warm);
  border-color: var(--border-warm);
  border-style: dashed;
  border-width: 1.5px;
  color: var(--accent-mid);
}
.btn-expand--rogue:hover {
  border-color: var(--accent-mid);
  color: var(--accent-mid);
}

/* ============================================================
   RESULTS FOOTER
   ============================================================ */
.results-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border);
}

.results-footer__restart {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-tertiary);
  background: none;
  border: none;
  padding: 6px 0;
  cursor: pointer;
  transition: color 0.15s;
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
}

.results-footer__restart:hover {
  color: var(--text-secondary);
}

.results-footer__back {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--text-secondary);
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.results-footer__back:hover {
  border-color: var(--accent-mid);
  color: var(--text-primary);
}

/* ============================================================
   RESPONSIVE ADJUSTMENTS
   ============================================================ */
@media (max-width: 480px) {
  .options-grid {
    grid-template-columns: 1fr 1fr;
  }
  .options-grid.single-col {
    grid-template-columns: 1fr;
  }
  .results-footer {
    flex-direction: column-reverse;
    align-items: stretch;
  }
  .results-footer__back {
    text-align: center;
  }
  .results-footer__restart {
    text-align: center;
  }
}

@media (max-width: 320px) {
  .options-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   SCROLL HINT
   ============================================================ */
#scroll-hint {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  color: var(--text-tertiary);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
  animation: scroll-hint-bob 2s ease-in-out infinite;
  z-index: 100;
}
#scroll-hint.visible {
  opacity: 1;
}
@keyframes scroll-hint-bob {
  0%, 100% { transform: translateX(-50%) translateY(0);   }
  50%       { transform: translateX(-50%) translateY(5px); }
}