:root {
  --cream: #FFF8EE;
  --coral: #FF6B4A;
  --sky: #2BBBD7;
  --yellow: #FFD166;
  --ink: #2E2321;
  --deep: #2A1E1A;
  --radius: 14px;
  --font-display: "Fredoka", "Noto Sans TC", "Noto Sans JP", sans-serif;
  --font-body: "Work Sans", "Noto Sans TC", "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* CJK fonts share Unicode code points but draw them differently per language
   (Han unification) — reorder the fallback stack per <html lang> so kanji/
   hanzi render with the correct glyph shapes instead of just "any font that
   has the character". English uses Work Sans directly. */
html[lang="ja"] {
  --font-display: "Fredoka", "Noto Sans JP", "Noto Sans TC", sans-serif;
  --font-body: "Noto Sans JP", "Work Sans", sans-serif;
}
html[lang="en"] {
  --font-body: "Work Sans", "Noto Sans TC", "Noto Sans JP", sans-serif;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.3;
  margin: 0;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 2rem;
  background: rgba(255, 248, 238, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 2px dashed rgba(46, 35, 33, 0.2);
}

.nav-brand { display: flex; align-items: center; }
.brand-badge {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  padding: 0.5rem 1.1rem;
  background: var(--ink);
  color: var(--cream);
  border-radius: 999px;
  transform: rotate(-2deg);
  display: inline-block;
  transition: transform 0.2s ease;
}
.nav-brand:hover .brand-badge { transform: rotate(0deg); }

.nav-links { display: flex; gap: 1.6rem; }
.nav-links a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  color: var(--ink);
  padding: 0.4rem 0.2rem;
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 3px;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
  border-radius: 2px;
}
.nav-links a:hover::after,
.nav-links a.is-active::after { transform: scaleX(1); }

.nav-right { display: flex; align-items: center; gap: 1.6rem; }

.lang-switch { display: flex; gap: 0.35rem; }
.lang-btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  padding: 0.32rem 0.65rem;
  border: 2px dashed rgba(46, 35, 33, 0.3);
  border-radius: 999px;
  transition: all 0.2s ease;
}
.lang-btn:hover { border-color: var(--ink); }
.lang-btn.is-active {
  background: var(--ink);
  color: var(--cream);
  border-color: var(--ink);
  border-style: solid;
}

/* ---------- Shared page structure ---------- */
#app { overflow-x: hidden; }
.section { padding: 5rem 1.5rem; }
.section-inner { max-width: 1120px; margin: 0 auto; }
.reveal { opacity: 0; }

/* ---------- Hero ---------- */
.hero {
  min-height: 82vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 3rem 1.5rem;
  max-width: 1120px;
  margin: 0 auto;
  gap: 1.75rem;
  background: var(--cream);
}

.hero-eyebrow {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--coral);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-title { font-size: clamp(2.6rem, 7vw, 5.2rem); overflow: hidden; }
.hero-title .line { display: block; transform: translateY(115%); }

.hero-sub {
  font-size: 1.1rem;
  max-width: 42ch;
  color: var(--ink);
  opacity: 0;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.7rem;
  background: var(--coral);
  color: var(--cream);
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 600;
  opacity: 0;
  transition: transform 0.2s ease, background 0.2s ease;
}
.hero-cta:hover { background: var(--ink); transform: translateY(-2px); }

/* ---------- Torn-paper dividers ---------- */
.divider {
  position: relative;
  width: 100%;
  height: 140px;
  overflow: hidden;
  line-height: 0;
}
.divider svg { display: block; width: 100%; height: 100%; }

.divider-decor {
  position: absolute;
  color: var(--ink);
  font-size: 1.1rem;
  pointer-events: none;
}
.divider-decor.dot { font-size: 0.6rem; }
.divider-decor.yellow { color: var(--yellow); }
.divider-decor.coral { color: var(--coral); }
.divider-decor.sky { color: var(--sky); }

/* ---------- Preview sections (home) ---------- */
.preview {
  padding: 5.5rem 1.5rem;
}
.preview-inner { max-width: 1120px; margin: 0 auto; }
.preview-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.preview-head h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); }

.preview--works { background: var(--coral); color: var(--cream); }
.preview--about { background: var(--sky); color: var(--ink); }
.preview--contact { background: var(--deep); color: var(--cream); }

.preview-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 600;
  background: var(--ink);
  color: var(--cream);
  transition: transform 0.2s ease;
}
.preview-cta:hover { transform: translateY(-2px) rotate(-1deg); }
.preview--about .preview-cta { background: var(--cream); color: var(--ink); }

.mini-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ---------- Y2K cards ---------- */
.card {
  position: relative;
  background: var(--cream);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 0.9rem;
  opacity: 0.95;
  transition: opacity 0.2s ease, transform 0.25s ease, box-shadow 0.25s ease;
  box-shadow: 0 6px 0 rgba(46,35,33,0.12);
}
.card:nth-child(3n+1) { transform: rotate(-2deg); }
.card:nth-child(3n+2) { transform: rotate(1.5deg); }
.card:nth-child(3n) { transform: rotate(-1deg); }
.card:hover, .card:focus-visible {
  opacity: 1;
  box-shadow: 0 12px 0 rgba(46,35,33,0.14);
}
.card:nth-child(3n+1):hover { transform: rotate(-2deg) translateY(-6px); }
.card:nth-child(3n+2):hover { transform: rotate(1.5deg) translateY(-6px); }
.card:nth-child(3n):hover { transform: rotate(-1deg) translateY(-6px); }

.card-thumb {
  aspect-ratio: 4/3;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--sky), var(--yellow));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: rgba(46,35,33,0.65);
  text-align: center;
  padding: 1rem;
  position: relative;
}

.stamp-badge {
  position: absolute;
  top: -14px;
  right: -10px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  border: 2px dashed var(--ink);
  background: var(--yellow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.62rem;
  font-weight: 700;
  text-align: center;
  transform: rotate(8deg);
  line-height: 1.15;
}

.tape {
  position: absolute;
  top: -10px;
  left: 24px;
  width: 60px;
  height: 20px;
  background: rgba(255, 209, 102, 0.85);
  transform: rotate(-4deg);
  border-radius: 2px;
}

.card h3 { font-size: 1.05rem; margin: 0.85rem 0 0.2rem; }
.card-meta { font-size: 0.82rem; color: rgba(46,35,33,0.65); margin: 0; }

/* ---------- Works page ---------- */
.page-head {
  padding: 3rem 1.5rem 1rem;
  max-width: 1120px;
  margin: 0 auto;
}
.page-head h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); display: flex; align-items: center; gap: 0.6rem; }
.page-head .fa-star { color: var(--yellow); animation: spin-slow 6s linear infinite; }

@keyframes spin-slow { to { transform: rotate(360deg); } }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  padding: 1.5rem 1.5rem 3rem;
  max-width: 1120px;
  margin: 0 auto;
}
.filter-btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  border: 2px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: all 0.2s ease;
}
.filter-btn:hover { background: var(--yellow); }
.filter-btn.is-active { background: var(--coral); border-color: var(--coral); color: var(--cream); }

.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  padding: 0 1.5rem 6rem;
  max-width: 1120px;
  margin: 0 auto;
}
.works-grid .card.is-hidden { display: none; }

/* ---------- Project detail page ---------- */
.detail-hero {
  padding: 2.5rem 1.5rem 0;
  max-width: 1120px;
  margin: 0 auto;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}
.detail-hero-img {
  aspect-ratio: 16/7;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--coral), var(--sky));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  text-align: center;
  padding: 1rem;
}
.detail-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.5rem 0 0.5rem;
}
.detail-meta-row h1 { font-size: clamp(2rem, 4.5vw, 3rem); }
.pill {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: var(--yellow);
  color: var(--ink);
}
.pill.year { background: transparent; border: 2px solid var(--ink); }

.detail-copy {
  max-width: 1120px;
  margin: 2.5rem auto 0;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.detail-copy h3 {
  font-size: 1.1rem;
  color: var(--coral);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.detail-copy p { margin: 0; color: var(--ink); }

.detail-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
  padding: 3rem 1.5rem 1rem;
  max-width: 1120px;
  margin: 0 auto;
}
.detail-gallery .ph {
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  background: var(--cream);
  border: 2px dashed rgba(46,35,33,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: rgba(46,35,33,0.6);
  text-align: center;
  padding: 0.75rem;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 1rem 1.5rem 3rem;
  max-width: 1120px;
  margin: 0 auto;
}
.tool-tags span {
  font-size: 0.82rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 2px solid var(--sky);
  color: var(--ink);
}

.detail-nav {
  display: flex;
  justify-content: space-between;
  padding: 2.5rem 1.5rem 5rem;
  max-width: 1120px;
  margin: 0 auto;
  border-top: 2px dashed rgba(46,35,33,0.2);
}
.detail-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-family: var(--font-display);
  font-weight: 600;
}
.detail-nav a:last-child { text-align: right; align-items: flex-end; }
.detail-nav small { font-weight: 400; color: rgba(46,35,33,0.6); font-family: var(--font-body); }

/* ---------- About page ---------- */
.about-page { padding-bottom: 5rem; }
.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 3rem;
  align-items: start;
  padding: 1rem 1.5rem;
  max-width: 1120px;
  margin: 0 auto;
}
.about-photo {
  aspect-ratio: 3/4;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--yellow), var(--coral));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(46,35,33,0.7);
  font-size: 0.9rem;
  text-align: center;
  padding: 1rem;
  transform: rotate(-2deg);
}
.about-text p { margin-bottom: 1.2rem; }

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
  list-style: none;
  padding: 0;
}
.tag-cloud li {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  color: var(--ink);
}
.tag-cloud li:nth-child(4n+1) { background: var(--yellow); transform: rotate(-2deg); }
.tag-cloud li:nth-child(4n+2) { background: var(--sky); color: var(--cream); transform: rotate(1.5deg); }
.tag-cloud li:nth-child(4n+3) { background: var(--coral); color: var(--cream); transform: rotate(-1deg); }
.tag-cloud li:nth-child(4n) { background: transparent; border: 2px solid var(--ink); transform: rotate(2deg); }

/* ---------- Contact page ---------- */
.contact-page {
  background: var(--deep);
  color: var(--cream);
  min-height: 70vh;
  display: flex;
  align-items: center;
}
.contact-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
  text-align: center;
}
.contact-inner h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); margin-bottom: 1rem; }
.contact-inner p { color: rgba(255,248,238,0.8); max-width: 46ch; margin: 0 auto 2.5rem; }
.contact-email-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 2rem;
  border-radius: 999px;
  background: var(--coral);
  color: var(--cream);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  transition: transform 0.2s ease;
}
.contact-email-btn:hover { transform: translateY(-2px) rotate(-1deg); background: var(--yellow); color: var(--ink); }

.social-row {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.social-row a {
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 2px solid rgba(255,248,238,0.4);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s ease;
}
.social-row a:hover { background: var(--cream); color: var(--deep); transform: rotate(-8deg); }

.site-footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.8rem;
  color: rgba(255,248,238,0.55);
}

@media (max-width: 780px) {
  .mini-grid, .about-grid, .detail-copy { grid-template-columns: 1fr; }
  .nav { padding: 1rem 1.2rem; }
  .nav-right { gap: 0.9rem; }
  .nav-links { gap: 1rem; }
  .section, .preview { padding: 3.5rem 1.2rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}
