/* TWmeme — Phase 1 front-end skeleton. Tokens from DESIGN.md. */

:root {
  /* Color */
  --primary: #FF5B4B;
  --primary-ink: #E04736;
  --accent: #FFC233;
  --bg: #FCFAF6;
  --surface: #FFFFFF;
  --ink: #1A1A1A;
  --muted: #6B6459;
  --border: #E8E2D6;
  --shadow-sm: 0 2px 8px rgba(26, 26, 26, 0.04);
  --shadow-md: 0 4px 16px rgba(26, 26, 26, 0.06);
  --shadow-lg: 0 12px 40px rgba(26, 26, 26, 0.1);

  /* Spacing (8-base) */
  --s-2xs: 2px; --s-xs: 4px; --s-sm: 8px; --s-md: 16px;
  --s-lg: 24px; --s-xl: 32px; --s-2xl: 48px; --s-3xl: 64px; --s-4xl: 96px;

  /* Radius */
  --r-sm: 6px; --r-md: 12px; --r-lg: 20px; --r-full: 9999px;

  /* Motion */
  --e-enter: cubic-bezier(0.16, 1, 0.3, 1);
  --d-short: 150ms;
  --d-medium: 250ms;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; }

/* A11y: respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* A11y: screen-reader-only utility */
.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;
}

/* A11y: keyboard focus ring — visible on all interactive elements */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}
.btn-search:focus-visible,
.chip:focus-visible {
  outline-offset: 3px;
}
.searchbox:focus-within { outline: none; }

body {
  font-family: 'DM Sans', 'Noto Sans TC', -apple-system, 'PingFang TC', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.display {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

a { color: inherit; text-decoration: none; }

/* ===== Header ===== */
.site-header {
  height: 80px;
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1200px; margin: 0 auto;
  padding: 0 var(--s-xl);
}
.wordmark {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 24px; font-weight: 700;
  letter-spacing: -0.02em;
}
.wordmark em { color: var(--primary); font-style: normal; }
.nav-links { display: flex; gap: var(--s-xl); }
.nav-links a {
  font-size: 14px; color: var(--muted);
  transition: color var(--d-short) ease-out;
}
.nav-links a:hover { color: var(--ink); }

/* ===== Hero ===== */
.hero {
  max-width: 1200px; margin: 0 auto;
  padding: var(--s-3xl) var(--s-xl) var(--s-2xl);
  text-align: center;
}
.hero h1 {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--s-md);
}
.hero .sub {
  font-size: 18px; color: var(--muted);
  margin-bottom: var(--s-xl);
}

/* ===== Search box ===== */
.searchbox {
  max-width: 640px; margin: 0 auto;
  display: flex; align-items: center;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--r-full);
  padding: var(--s-sm) var(--s-sm) var(--s-sm) var(--s-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--d-short) ease-out, box-shadow var(--d-short) ease-out;
}
.searchbox:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(255, 91, 75, 0.12);
}
.searchbox svg { flex-shrink: 0; color: var(--muted); }
.searchbox input {
  flex: 1; border: none; outline: none; background: transparent;
  font: inherit; font-size: 16px;
  padding: 0 var(--s-md);
  color: var(--ink);
}
.searchbox input::placeholder { color: var(--muted); }
.btn-search {
  width: 48px; height: 48px;
  border: none; cursor: pointer;
  background: var(--primary); color: white;
  border-radius: var(--r-full);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--d-short) ease-out, transform var(--d-short) var(--e-enter);
}
.btn-search:hover { background: var(--primary-ink); transform: scale(1.05); }
.btn-search:active { transform: scale(0.97); }

/* ===== Tag chips ===== */
.chips {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: var(--s-sm);
  max-width: 720px; margin: var(--s-lg) auto 0;
}
.chip {
  display: inline-flex; align-items: center;
  min-height: 44px;
  padding: var(--s-sm) var(--s-md);
  border-radius: var(--r-full);
  font-size: 14px; font-weight: 500;
  cursor: pointer; user-select: none;
  transition: transform var(--d-short) var(--e-enter),
              background var(--d-short) ease-out;
  border: 1px solid transparent;
  font-family: inherit;
  background: none;
}
.chip.emotion { background: #FFE6A8; color: #6B4A00; }
.chip.emotion:hover { background: var(--accent); color: var(--ink); transform: translateY(-2px); }
.chip.role { background: var(--surface); color: var(--ink); border-color: var(--border); }
.chip.role:hover { border-color: var(--ink); transform: translateY(-2px); }
.chip-group-label {
  font-size: 13px; color: var(--muted); font-weight: 500;
  margin: var(--s-md) 0 var(--s-sm);
}

/* ===== Trending Section ===== */
.section {
  max-width: 1200px; margin: 0 auto;
  padding: var(--s-3xl) var(--s-xl);
}
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: var(--s-xl);
}
.section-head h2 {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-size: 28px; font-weight: 600;
  letter-spacing: -0.01em;
}
.section-head .more {
  font-size: 14px; color: var(--muted);
}
.section-head .more:hover { color: var(--primary); }

/* Broken grid for trending (home only) — desktop */
.broken-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 120px;
  gap: var(--s-md);
}
@media (min-width: 901px) {
  .broken-grid .card-wrap:nth-child(1) { grid-column: span 5; grid-row: span 3; }
  .broken-grid .card-wrap:nth-child(2) { grid-column: span 3; grid-row: span 2; }
  .broken-grid .card-wrap:nth-child(3) { grid-column: span 4; grid-row: span 2; }
  .broken-grid .card-wrap:nth-child(4) { grid-column: span 3; grid-row: span 2; }
  .broken-grid .card-wrap:nth-child(5) { grid-column: span 4; grid-row: span 3; }
  .broken-grid .card-wrap:nth-child(6) { grid-column: span 3; grid-row: span 2; }
  .broken-grid .card-wrap:nth-child(7) { grid-column: span 5; grid-row: span 2; }
  .broken-grid .card-wrap:nth-child(8) { grid-column: span 4; grid-row: span 2; }
  .broken-grid .card-wrap:nth-child(9) { grid-column: span 3; grid-row: span 2; }
}

@media (max-width: 900px) {
  .broken-grid { grid-template-columns: repeat(6, 1fr); }
  .broken-grid .card-wrap { grid-column: span 3; grid-row: span 2; }
}

/* Uniform masonry for results page */
.masonry {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  grid-auto-rows: 280px;
  gap: var(--s-md);
}
.masonry .card-wrap.tall { grid-row: span 2; }

/* ===== Meme Card ===== */
/* card-wrap = the grid item, wraps card link + copy button sibling.
   Structure: <article class="card-wrap"><a class="card">...</a><button class="copy-ghost">...</button></article> */
.card-wrap {
  position: relative;
  display: block;
}
.card {
  position: relative;
  background: var(--surface);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform var(--d-medium) var(--e-enter),
              box-shadow var(--d-medium) ease-out;
  display: flex; flex-direction: column;
  height: 100%;
  color: inherit;
  text-decoration: none;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.card .thumb {
  flex: 1; position: relative;
  display: flex; align-items: center; justify-content: center;
  font-size: 72px;
  overflow: hidden;
  transition: transform var(--d-medium) ease-out;
}
.card:hover .thumb { transform: scale(1.02); }
.card .caption {
  padding: var(--s-sm) var(--s-md);
  font-size: 14px; color: var(--muted); font-weight: 500;
  border-top: 1px solid var(--border);
}
.card .caption .name { color: var(--ink); display: block; }

/* Copy button: sibling of <a>, absolute-positioned in card-wrap bottom-right */
.copy-ghost {
  position: absolute;
  bottom: var(--s-sm);
  right: var(--s-sm);
  z-index: 2;
  opacity: 0;
  visibility: hidden;
  font-size: 12px; color: var(--primary); font-weight: 600;
  border: 1px solid var(--primary);
  padding: 4px 10px;
  border-radius: var(--r-sm);
  background: var(--surface);
  font-family: inherit;
  cursor: pointer;
  transition: opacity var(--d-short) ease-out,
              visibility var(--d-short) ease-out,
              background var(--d-short) ease-out,
              color var(--d-short) ease-out;
}
.card-wrap:hover .copy-ghost,
.card-wrap:focus-within .copy-ghost {
  opacity: 1;
  visibility: visible;
}
.copy-ghost:hover { background: var(--primary); color: white; }

.quality-badge {
  position: absolute; top: var(--s-sm); right: var(--s-sm);
  background: var(--accent); color: var(--ink);
  font-size: 11px; font-weight: 700; letter-spacing: 0.04em;
  padding: 3px 8px; border-radius: var(--r-sm);
  box-shadow: var(--shadow-sm);
}

/* Gradient placeholders for meme thumbs */
.t-coral { background: linear-gradient(135deg, #FFD3C8, #FFA08C); }
.t-mustard { background: linear-gradient(135deg, #FFE9B5, #FFC233); }
.t-sage { background: linear-gradient(135deg, #D5E8C4, #9BC084); }
.t-sky { background: linear-gradient(135deg, #C8DCF0, #8AB6E0); }
.t-plum { background: linear-gradient(135deg, #E8CFE0, #C2A0BA); }
.t-sand { background: linear-gradient(135deg, #EFE2CC, #C9B494); }
.t-mint { background: linear-gradient(135deg, #CBEBDE, #8ECEB0); }
.t-rose { background: linear-gradient(135deg, #F5D4D0, #E09890); }
.t-steel { background: linear-gradient(135deg, #D6D9DE, #9AA0AA); }

/* ===== Footer ===== */
.site-footer {
  max-width: 1200px; margin: 0 auto;
  padding: var(--s-xl);
  text-align: center;
  font-size: 13px; color: var(--muted);
  border-top: 1px solid var(--border);
  margin-top: var(--s-2xl);
}

/* ===== Top bar for sub-pages ===== */
.topbar {
  max-width: 1200px; margin: 0 auto;
  padding: var(--s-lg) var(--s-xl);
  display: flex; align-items: center; gap: var(--s-lg);
  border-bottom: 1px solid var(--border);
}
.topbar .back {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--r-full);
  color: var(--muted);
  transition: background var(--d-short) ease-out, color var(--d-short) ease-out;
}
.topbar .back:hover { background: var(--border); color: var(--ink); }
.topbar .searchbox { flex: 1; margin: 0; max-width: 560px; }
.topbar .result-meta {
  margin-left: auto;
  font-size: 13px; color: var(--muted);
}

/* ===== Detail page ===== */
.detail {
  max-width: 1200px; margin: 0 auto;
  padding: var(--s-2xl) var(--s-xl);
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--s-2xl);
}
@media (max-width: 900px) {
  .detail { grid-template-columns: 1fr; }
}
.detail .image-pane {
  background: var(--surface);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  aspect-ratio: 1;
  display: flex; align-items: center; justify-content: center;
  font-size: 180px;
  position: relative;
}
.detail .image-pane .quality-badge {
  top: var(--s-md); right: var(--s-md);
  font-size: 13px; padding: 6px 12px;
}
.detail aside h1 {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-size: 28px; font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--s-md);
}
.detail aside .meta-row {
  display: flex; justify-content: space-between;
  font-size: 13px; color: var(--muted);
  padding-bottom: var(--s-md);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--s-md);
}
.detail aside .tags {
  display: flex; flex-wrap: wrap; gap: var(--s-xs);
  margin-bottom: var(--s-xl);
}
.detail aside .tag-sm {
  font-size: 13px; color: var(--primary);
  background: rgba(255, 91, 75, 0.08);
  padding: 4px 10px; border-radius: var(--r-full);
}
.detail aside .actions { display: flex; flex-direction: column; gap: var(--s-sm); }
.btn {
  padding: var(--s-md) var(--s-lg);
  border: none; cursor: pointer;
  font: inherit; font-size: 15px; font-weight: 600;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center; gap: var(--s-sm);
  transition: transform var(--d-short) var(--e-enter),
              background var(--d-short) ease-out;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-ink); transform: translateY(-2px); }
.btn-secondary { background: var(--surface); color: var(--ink); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--ink); transform: translateY(-2px); }

/* AI upgrade teaser (Phase 1.5 preview placement) */
.ai-teaser {
  margin-top: var(--s-xl);
  padding: var(--s-md);
  background: linear-gradient(135deg, rgba(255, 194, 51, 0.15), rgba(255, 91, 75, 0.08));
  border: 1px dashed var(--accent);
  border-radius: var(--r-md);
  font-size: 13px;
}
.ai-teaser strong { color: var(--ink); }
.ai-teaser .price { color: var(--primary); font-weight: 700; }

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: var(--s-2xl); left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--ink); color: white;
  padding: var(--s-sm) var(--s-lg);
  border-radius: var(--r-full);
  font-size: 14px;
  opacity: 0; pointer-events: none;
  transition: opacity var(--d-short) ease-out, transform var(--d-short) var(--e-enter);
  box-shadow: var(--shadow-lg);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== Image thumb (Supabase real meme) ===== */
/* Used by both card thumbs (results/index) and the detail page image pane.
   object-fit: cover ensures images fill their square containers without
   distortion. The cards/panes themselves enforce the aspect ratio. */
.thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ===== Detail page empty state ===== */
.detail-empty {
  max-width: 480px;
  margin: var(--s-3xl) auto;
  padding: var(--s-xl);
  text-align: center;
}
.detail-empty h2 {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--s-sm);
  color: var(--ink);
}
.detail-empty p {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: var(--s-lg);
}
.detail .image-pane .emoji-fallback {
  font-size: 180px;
}

/* ===== Zero-result fallback form (results.html) ===== */
.unmet-form {
  background: linear-gradient(135deg, rgba(255, 194, 51, 0.12), rgba(255, 91, 75, 0.06));
  border: 1px dashed var(--accent);
  border-radius: var(--r-md);
  padding: var(--s-lg);
  margin: 0 auto var(--s-xl);
  max-width: 640px;
  box-shadow: var(--shadow-sm);
}
.unmet-title {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: var(--s-xs);
}
.unmet-title span {
  color: var(--primary);
  word-break: break-all;
}
.unmet-sub {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: var(--s-md);
}
.unmet-form textarea {
  width: 100%;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--s-sm) var(--s-md);
  resize: vertical;
  min-height: 72px;
  margin-bottom: var(--s-sm);
  transition: border-color var(--d-short);
}
.unmet-form textarea:focus {
  outline: none;
  border-color: var(--primary);
}
.unmet-submit {
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--r-full);
  padding: var(--s-sm) var(--s-xl);
  min-height: 40px;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--d-short), transform var(--d-short);
}
.unmet-submit:hover {
  background: var(--primary-ink);
  transform: scale(1.03);
}
.unmet-submit:active { transform: scale(0.97); }

/* ===== FAQ Section (SEO/AEO) ===== */
.faq-section {
  padding-top: var(--s-2xl);
  padding-bottom: var(--s-4xl);
}
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s-lg);
}
@media (max-width: 768px) {
  .faq-grid { grid-template-columns: 1fr; gap: var(--s-md); }
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: var(--s-lg) var(--s-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--d-short) ease-out, transform var(--d-short) var(--e-enter);
}
.faq-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.faq-q {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 var(--s-sm) 0;
  position: relative;
  padding-left: var(--s-md);
}
.faq-q::before {
  content: 'Q';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary);
  font-weight: 700;
  font-family: 'Space Grotesk', sans-serif;
}
.faq-a {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin: 0;
}

/* ===== Static meme detail page (Phase 2 SSG) ===== */
.meme-context {
  margin-top: var(--s-xl);
  padding-top: var(--s-lg);
  border-top: 1px solid var(--border);
}
.meme-context p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  margin: 0;
}
.caption .meta-sm {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

/* ===== Article / Guide pages (Phase 3) ===== */
.article {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--s-3xl) var(--s-xl) var(--s-4xl);
}
.article h1 {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: var(--s-md) 0;
}
.article h2 {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin: var(--s-2xl) 0 var(--s-md);
}
.article h3 {
  font-family: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  font-size: 19px;
  font-weight: 600;
  margin: var(--s-xl) 0 var(--s-sm);
}
.article p,
.article li {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  margin: 0 0 var(--s-md);
}
.article ul,
.article ol {
  padding-left: var(--s-xl);
  margin: 0 0 var(--s-md);
}
.article li { margin-bottom: var(--s-xs); }
.article a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.article a:hover { color: var(--primary-ink); }
.article code {
  font-family: 'DM Sans', monospace;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 2px 6px;
  font-size: 14px;
}
.article-breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 var(--s-md);
}
.article-breadcrumb a { color: var(--muted); text-decoration: none; }
.article-breadcrumb a:hover { color: var(--ink); }
.article-byline {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 var(--s-xl);
}
.tldr {
  background: #FFF6E6;
  border-left: 4px solid var(--accent);
  border-radius: var(--r-sm);
  padding: var(--s-md) var(--s-lg);
  margin: var(--s-xl) 0 var(--s-2xl);
  font-size: 15px;
  line-height: 1.7;
}
.tldr strong { color: #6B4A00; }
.article-cta {
  margin-top: var(--s-3xl);
  padding-top: var(--s-xl);
  border-top: 1px solid var(--border);
  text-align: center;
}
.article-cta h3 { margin-bottom: var(--s-md); }
.article-cta .btn { display: inline-flex; margin: var(--s-xs); }
.article table {
  font-size: 14px;
  line-height: 1.5;
}

/* Guide index list */
.guide-list {
  display: flex;
  flex-direction: column;
  gap: var(--s-md);
  margin-top: var(--s-2xl);
}
.guide-item {
  display: block;
  padding: var(--s-lg) var(--s-xl);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  text-decoration: none !important;
  color: var(--ink) !important;
  transition: box-shadow var(--d-short) ease-out, transform var(--d-short) var(--e-enter);
}
.guide-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.guide-item h2 {
  font-size: 19px !important;
  margin: 0 0 var(--s-sm) !important;
  color: var(--ink);
}
.guide-item p {
  font-size: 15px !important;
  color: var(--muted);
  margin: 0 0 var(--s-sm) !important;
}
.guide-meta {
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
}