/*
 * style.css -- Word of the Day
 * Theme: literary, calm, serif-led.
 * Background #fafafa, primary text #1a1a1a, accent #5a4a2c (warm bronze).
 *
 * Font strategy (V1): system serif fallback only.
 * No @font-face, no @import, no CDN fetches.
 * Stack: Charter -> Iowan Old Style -> Source Serif Pro -> Georgia -> Times New Roman -> serif
 * Rationale: zero asset weight, zero CLS, perfect LCP. V2 may ship a custom woff2 serif.
 *
 * UI elements (nav, buttons, labels): system sans stack.
 */

/* ============================================================
   Custom properties
   ============================================================ */

:root {
  --serif: "Charter", "Iowan Old Style", "Source Serif Pro", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --color-bg:         #fafafa;
  --color-text:       #1a1a1a;
  --color-muted:      #6b6260;
  --color-accent:     #5a4a2c;
  --color-accent-mid: #7a6440;
  --color-border:     #d4cfc4;
  --color-surface:    #f0ebe0;
  --color-surface-hover: #e8e2d4;
  --color-arrow-bg:   #f0ebe0;
  --color-arrow-hover:#5a4a2c;

  --width-narrow:     720px;
  --width-stage:      100vw;

  --radius-arrow:     50%;
}

/* ============================================================
   Reset + base
   ============================================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================================
   Accessibility
   ============================================================ */

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-accent);
  color: #fff;
  padding: 0.5rem 1rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  z-index: 9999;
  border-radius: 0 0 4px 4px;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

/* ============================================================
   Typography -- headings
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.2;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

h1 { font-size: 2rem; margin-top: 0; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.2rem; }

/* ============================================================
   Site header
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header .inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

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

/* Primary nav -- .primary-nav is the class used in templates; .site-nav is an alias */
.site-nav,
.primary-nav,
nav.primary-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-family: var(--sans);
  font-size: 0.9rem;
}

.primary-nav a {
  color: var(--color-muted);
  text-decoration: none;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.primary-nav a:hover,
.primary-nav a[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ============================================================
   Word stage -- above the fold
   ============================================================ */

.word-stage {
  width: 100%;
  min-height: 78vh;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas: "prev center next";
  align-items: center;
  padding: 5vh 0;
  position: relative;
}

/* Center column */
.word-stage-center {
  grid-area: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 2rem;
  gap: 0.75rem;
}

/* Arrow columns */
.word-arrow-prev { grid-area: prev; }
.word-arrow-next { grid-area: next; }

/* ============================================================
   Giant arrows
   ============================================================ */

.word-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 104px;
  height: 104px;
  background: var(--color-arrow-bg);
  border-radius: var(--radius-arrow);
  color: var(--color-accent);
  text-decoration: none;
  transition: background 0.18s, color 0.18s, transform 0.12s;
  flex-shrink: 0;
  margin: 0 1.5rem;
  border: 1px solid var(--color-border);
}

.word-arrow svg {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
}

.word-arrow:hover {
  background: var(--color-arrow-hover);
  color: #fff;
  transform: scale(1.05);
  border-color: var(--color-arrow-hover);
}

/* Arrow active flash from keyboard nav */
.word-arrow.arrow-flash {
  background: var(--color-arrow-hover);
  color: #fff;
}

/* Disabled state when no prev/next */
.word-arrow[aria-disabled="true"],
.word-arrow.disabled {
  opacity: 0.22;
  pointer-events: none;
  cursor: default;
}

/* ============================================================
   The giant word
   ============================================================ */

.word-display {
  font-family: var(--serif);
  font-size: clamp(72px, 11vw, 160px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-transform: capitalize;
  text-align: center;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.04);
  margin: 0;
  padding: 0;
}

/* ============================================================
   Phonetic + part of speech
   ============================================================ */

.word-phonetic {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--color-muted);
  letter-spacing: 0.01em;
  font-style: italic;
}

.word-pos {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* Phonetic + pos on same row when both present */
.word-meta-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.word-meta-sep {
  color: var(--color-border);
  font-size: 1.1rem;
}

/* ============================================================
   Badges (difficulty, themes)
   ============================================================ */

.word-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
}

.badge {
  font-family: var(--sans);
  font-size: 0.75rem;
  padding: 0.2em 0.65em;
  border-radius: 12px;
  background: var(--color-surface);
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  text-transform: lowercase;
}

.badge-difficulty {
  background: var(--color-accent);
  color: #fff;
  border-color: transparent;
}

/* ============================================================
   Definition (within word stage)
   ============================================================ */

.word-definition {
  font-family: var(--serif);
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--color-text);
  max-width: 580px;
  margin: 0;
}

/* ============================================================
   Examples preview (italic quote in stage)
   ============================================================ */

.word-examples {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 520px;
  margin: 0;
  padding-left: 1.25em;
  border-left: 2px solid var(--color-border);
  text-align: left;
}

/* ============================================================
   Answer block (AEO featured-snippet target)
   ============================================================ */

.answer-block {
  background: var(--color-surface);
  border-left: 3px solid var(--color-accent);
  padding: 0.9em 1.2em;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--color-text);
  max-width: 560px;
  margin: 0;
}

/* ============================================================
   Date display in stage
   ============================================================ */

.word-date {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  display: flex;
  align-items: center;
  gap: 0.6em;
}

.word-date::before,
.word-date::after {
  content: "";
  display: block;
  width: 2rem;
  height: 1px;
  background: var(--color-border);
}

/* ============================================================
   Keyboard hint
   ============================================================ */

.keyboard-hint {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--color-border);
  margin-top: 1.5rem;
  letter-spacing: 0.04em;
}

/* ============================================================
   Layout shells
   ============================================================ */

/* Full width content */
.shell-full {
  width: 100%;
}

/* Narrow prose shell (720px max) */
.shell-narrow {
  max-width: var(--width-narrow);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

/* ============================================================
   Prose sections (below the fold)
   ============================================================ */

.word-etymology,
.word-anecdotes,
.word-related,
.word-sources,
.word-faq,
.word-challenge {
  margin: 2.5rem 0;
}

.section-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.5rem 0;
}

/* ============================================================
   Article prose (about, contact, SEO articles, privacy, terms)
   ============================================================ */

.article-prose {
  font-family: var(--serif);
}

.article-prose p {
  margin-bottom: 1.5em;
}

.article-prose h2 {
  border-bottom: 1px dotted var(--color-border);
  padding-bottom: 0.3rem;
  margin-top: 2.5rem;
}

.article-prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 2px;
}

.article-prose a:hover {
  text-decoration-color: var(--color-accent);
}

/* External links: dotted underline */
.article-prose a[target="_blank"] {
  text-decoration-style: dotted;
}

/* ============================================================
   Article hero (breadcrumb + title + byline)
   ============================================================ */

.article-hero {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.article-hero h1 {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.breadcrumb {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--color-muted);
  margin: 0 0 0.25rem;
}

.breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.byline {
  font-family: var(--sans);
  font-size: 0.88rem;
  color: var(--color-muted);
  margin: 0;
}

/* ============================================================
   Sources / further reading block
   ============================================================ */

.word-sources ul,
.sources-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.word-sources ul li::before,
.sources-list li::before {
  content: ">";
  color: var(--color-accent);
  margin-right: 0.5em;
  font-family: var(--sans);
  font-size: 0.85em;
}

.word-sources a,
.sources-list a {
  color: var(--color-accent);
  text-decoration-style: dotted;
  text-decoration-color: var(--color-border);
  text-underline-offset: 2px;
}

.word-sources a:hover,
.sources-list a:hover {
  text-decoration-color: var(--color-accent);
}

/* ============================================================
   Related words grid
   ============================================================ */

.related-words-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}

.related-word-card {
  padding: 0.85rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  text-decoration: none;
  color: var(--color-text);
  transition: background 0.12s, border-color 0.12s;
}

.related-word-card:hover {
  background: var(--color-surface);
  border-color: var(--color-accent);
}

.related-word-card .word-title {
  font-weight: 700;
  font-size: 1rem;
  display: block;
  text-transform: capitalize;
}

.related-word-card .word-def-short {
  font-size: 0.82rem;
  color: var(--color-muted);
  margin-top: 0.2rem;
  display: block;
  line-height: 1.4;
}

/* ============================================================
   Archive grid + word cards
   ============================================================ */

.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.word-card {
  border: 1px solid var(--color-border);
  padding: 1rem 1.15rem;
  border-radius: 4px;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-bg);
  transition: background 0.12s, border-color 0.12s;
  display: block;
}

.word-card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-accent);
}

.word-card .word-card-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.15rem;
  display: block;
  margin-bottom: 0.3rem;
  text-transform: capitalize;
}

.word-card .word-card-def {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.word-card .word-card-date {
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--color-border);
  margin-top: 0.5rem;
  display: block;
  letter-spacing: 0.04em;
}

/* ============================================================
   Letter index
   ============================================================ */

.letter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 1rem 0;
}

.letter-nav a {
  font-family: var(--sans);
  font-size: 0.9rem;
  width: 2.2rem;
  height: 2.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  text-decoration: none;
  color: var(--color-text);
  text-transform: uppercase;
  transition: background 0.12s, border-color 0.12s;
}

.letter-nav a:hover,
.letter-nav a.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.letter-nav a.inactive {
  opacity: 0.35;
  pointer-events: none;
}

/* ============================================================
   Pagination
   ============================================================ */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 2rem 0;
  font-family: var(--sans);
  font-size: 0.9rem;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.2rem;
  height: 2.2rem;
  padding: 0 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  text-decoration: none;
  color: var(--color-text);
  transition: background 0.12s;
}

.pagination a:hover {
  background: var(--color-surface);
  border-color: var(--color-accent);
}

.pagination .current {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  font-weight: 600;
}

/* ============================================================
   Contact form
   ============================================================ */

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 2rem 0;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-family: var(--sans);
  font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text);
  font-family: var(--serif);
  font-size: 1rem;
  border-radius: 0;
  outline: none;
  transition: border-color 0.15s;
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  border-color: var(--color-accent);
}

.contact-form textarea {
  resize: vertical;
  min-height: 140px;
}

.btn-primary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  border-radius: 0;
  transition: background 0.15s;
  text-decoration: none;
}

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

.btn-secondary {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  background: transparent;
  color: var(--color-accent);
  font-family: var(--sans);
  font-size: 0.9rem;
  border: 1px solid var(--color-accent);
  cursor: pointer;
  border-radius: 0;
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}

.btn-secondary:hover {
  background: var(--color-accent);
  color: #fff;
}

/* ============================================================
   Explore more nav block (bottom of word page)
   ============================================================ */

.explore-more {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 2.5rem 0;
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.explore-more a {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1px;
  transition: border-color 0.12s;
}

.explore-more a:hover {
  border-bottom-color: var(--color-accent);
}

/* ============================================================
   FAQ section
   ============================================================ */

.word-faq details {
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
}

.word-faq summary {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 1.5em;
}

.word-faq summary::-webkit-details-marker {
  display: none;
}

.word-faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  color: var(--color-accent);
  font-size: 1.1rem;
  font-weight: 300;
  transition: transform 0.15s;
}

.word-faq details[open] summary::after {
  transform: rotate(45deg);
}

.word-faq details p {
  margin: 0.75rem 0 0.25rem;
  font-size: 0.97rem;
}

/* ============================================================
   Error pages
   ============================================================ */

.error-page {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
}

.error-title {
  font-family: var(--serif);
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
  margin: 0 0 0.5rem;
}

.error-body {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 420px;
  margin: 0 auto 2rem;
}

/* ============================================================
   Challenge block
   ============================================================ */

.word-challenge {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
}

.word-challenge p {
  margin: 0 0 1rem;
}

/* ============================================================
   Community / UGC placeholder
   ============================================================ */

.community-placeholder {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* ============================================================
   Site footer
   ============================================================ */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--width-narrow);
  margin: 0 auto;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  margin-bottom: 0.75rem;
}

.site-footer nav a {
  color: var(--color-muted);
  text-decoration: none;
}

.site-footer nav a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.site-footer p {
  margin: 0.4rem 0 0;
}

.tbs-footer-network {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--color-border);
}

.tbs-footer-network a {
  color: var(--color-muted);
  text-decoration: none;
}

.tbs-footer-network a:hover {
  color: var(--color-accent);
}

/* ============================================================
   Responsive -- 700px breakpoint
   ============================================================ */

@media (max-width: 700px) {
  body {
    font-size: 16px;
  }

  .site-header .inner {
    padding: 0 1rem;
    height: 50px;
  }

  .primary-nav {
    gap: 0.75rem;
    font-size: 0.82rem;
  }

  /* Word stage: stack arrows under word on mobile */
  .word-stage {
    grid-template-columns: 1fr;
    grid-template-areas:
      "center"
      "prev";
    min-height: auto;
    padding: 3vh 0 2vh;
  }

  /* Hide prev/next column arrows -- show float pair below center */
  .word-arrow-prev,
  .word-arrow-next {
    display: none;
  }

  /* Mobile arrow row shown via sibling element in template */
  .word-arrows-mobile {
    grid-area: prev;
    display: flex;
    justify-content: center;
    gap: 3rem;
    padding: 1.5rem 0 0.5rem;
  }

  .word-arrows-mobile .word-arrow {
    width: 64px;
    height: 64px;
    margin: 0;
  }

  .word-arrows-mobile .word-arrow svg {
    width: 1.4rem;
    height: 1.4rem;
  }

  .word-stage-center {
    padding: 0 1rem;
  }

  .word-definition {
    font-size: 1.05rem;
  }

  .answer-block {
    font-size: 0.97rem;
  }

  .shell-narrow {
    padding: 1.5rem 1rem;
  }

  .archive-grid {
    grid-template-columns: 1fr 1fr;
  }

  .related-words-grid {
    grid-template-columns: 1fr 1fr;
  }

  h1 { font-size: 1.65rem; }
  h2 { font-size: 1.25rem; }
}

/* ============================================================
   Responsive -- 480px breakpoint
   ============================================================ */

@media (max-width: 480px) {
  .primary-nav {
    gap: 0.5rem;
    font-size: 0.78rem;
  }

  .archive-grid {
    grid-template-columns: 1fr;
  }

  .related-words-grid {
    grid-template-columns: 1fr;
  }

  .word-date::before,
  .word-date::after {
    width: 1rem;
  }

  .explore-more {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
  }

  .letter-nav a {
    width: 2rem;
    height: 2rem;
    font-size: 0.8rem;
  }
}

/* ============================================================
   Print styles
   ============================================================ */

@media print {
  .site-header,
  .word-arrow,
  .word-arrow-prev,
  .word-arrow-next,
  .word-arrows-mobile,
  .keyboard-hint,
  .site-footer,
  .explore-more,
  .word-challenge,
  .skip-link {
    display: none !important;
  }

  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
    font-family: Georgia, "Times New Roman", serif;
  }

  .word-display {
    font-size: 48pt;
    text-shadow: none;
    color: #000;
  }

  .shell-narrow {
    max-width: 100%;
    padding: 0;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #444;
  }

  .answer-block {
    background: none;
    border-left: 2pt solid #000;
  }
}