/* ============================================================
   Yuki Taniguchi — Portfolio
   Minimal editorial design for architectural visualization
   ============================================================ */

:root {
  --ink:        #1c1b19;
  --ink-soft:   #4a4843;
  --muted:      #8c897f;
  --line:       #e4e1da;
  --paper:      #f7f5f1;
  --paper-2:    #ffffff;
  --accent:     #9a7b4f;       /* warm bronze */
  --max:        1240px;
  --gap:        clamp(1rem, 3vw, 2.25rem);
  --ease:       cubic-bezier(.22,.61,.36,1);
  --serif:      "Fraunces", "Noto Serif JP", Georgia, "Yu Mincho", serif;
  --serif-jp:   "Noto Serif JP", "Fraunces", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --sans:       "Inter", "Noto Sans JP", system-ui, -apple-system, sans-serif;
  --jp:         "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }

/* ---------- Japanese typography ----------
   Wrap Japanese at natural phrase (bunsetsu) boundaries instead of
   breaking mid-word. `auto-phrase` is honored by modern engines;
   others fall back to the default CJK wrapping. */
html[lang="ja"] {
  --serif: "Noto Serif JP", "Fraunces", Georgia, "Yu Mincho", serif;
}
html[lang="ja"] .hero h1,
html[lang="ja"] .lead,
html[lang="ja"] .about-lead,
html[lang="ja"] .about-body p,
html[lang="ja"] .contact-intro p,
html[lang="ja"] .form-note,
html[lang="ja"] .work-cap h3,
html[lang="ja"] .work-cap p,
html[lang="ja"] .price-tag .label,
html[lang="ja"] .fact dd {
  word-break: auto-phrase;
  line-break: strict;
  text-wrap: pretty;
}
html[lang="ja"] .hero h1 { text-wrap: balance; }
/* English prose: tidy ragged edges where supported */
html[lang="en"] .hero h1, html[lang="en"] .about-lead { text-wrap: balance; }
html[lang="en"] .lead, html[lang="en"] .about-body p, html[lang="en"] .contact-intro p { text-wrap: pretty; }

.wrap { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: clamp(1.2rem, 5vw, 3rem); }

.eyebrow {
  font-size: .72rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  margin: 0 0 1.1rem;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .4s var(--ease), background .4s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--line); }
.site-header .wrap {
  display: flex; align-items: center; gap: clamp(1.4rem, 4vw, 3rem);
  height: 72px;
}
.wordmark {
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: .18em;
  font-size: .95rem;
  margin-right: auto;
}
.wordmark span { color: var(--accent); }
.nav { display: flex; gap: clamp(1.2rem, 3vw, 2.4rem); align-items: center; }
.nav-actions { display: flex; align-items: center; gap: 1.2rem; }

/* Language switch */
.lang-switch { display: inline-flex; align-items: center; gap: .5rem; }
.lang-switch button {
  background: none; border: 0; cursor: pointer; padding: .2rem .1rem;
  font-family: var(--sans); font-size: .76rem; letter-spacing: .14em; font-weight: 500;
  color: var(--muted); transition: color .3s var(--ease);
}
.lang-switch button:hover { color: var(--ink); }
.lang-switch button.active { color: var(--ink); }
.lang-switch .sep { color: var(--line); font-size: .76rem; }
.nav a {
  font-size: .82rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-soft); font-weight: 500; position: relative; padding: .3rem 0;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--ink); transition: width .35s var(--ease);
}
.nav a:hover::after, .nav a.active::after { width: 100%; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: .5rem; }
.nav-toggle span { display: block; width: 24px; height: 1.5px; background: var(--ink); margin: 5px 0; transition: .3s var(--ease); }

/* ---------- Hero ---------- */
.hero { padding: clamp(4rem, 12vh, 8.5rem) 0 clamp(3rem, 8vh, 6rem); }
.hero h1 {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-optical-sizing: auto;
  font-size: clamp(2rem, 5.2vw, 4rem);
  line-height: 1.12;
  letter-spacing: -.01em;
  margin: 0 0 1.8rem;
  max-width: 16ch;
}
.hero .lead-jp {
  font-family: var(--jp);
  font-size: clamp(1rem, 1.7vw, 1.18rem);
  line-height: 2; color: var(--ink-soft);
  max-width: 46ch; margin: 0 0 1rem; font-weight: 400;
}
.hero .lead-en {
  font-size: .98rem; color: var(--muted); max-width: 52ch; margin: 0;
}

/* ---------- Section scaffolding ---------- */
section { scroll-margin-top: 80px; }
.section { padding: clamp(3.5rem, 9vh, 7rem) 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: clamp(2rem, 5vw, 3.5rem); flex-wrap: wrap; }
.section-head h2 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(1.5rem, 3.2vw, 2.3rem); margin: 0; letter-spacing: -.01em;
}
.section-head .count { color: var(--muted); font-size: .82rem; letter-spacing: .14em; }

/* ---------- Work grid (masonry) ---------- */
.work { columns: 1; column-gap: var(--gap); }
@media (min-width: 620px) { .work { columns: 2; } }
@media (min-width: 1000px) { .work { columns: 3; } }

.work-item {
  break-inside: avoid; margin-bottom: var(--gap);
  display: block; position: relative; cursor: pointer;
  background: var(--paper-2); overflow: hidden;
  border: 1px solid var(--line);
}
.work-item img, .work-item video { width: 100%; height: auto; display: block; object-fit: cover; transition: transform .9s var(--ease), filter .6s var(--ease); }
/* iOS Safari doesn't derive a <video>'s ratio from its width/height attributes,
   so give it an explicit aspect-ratio or the tile collapses. 1080×1920 = 9/16. */
.work-item video { aspect-ratio: 9 / 16; }
.work-item:hover img, .work-item:hover video { transform: scale(1.04); }
.work-cap {
  position: absolute; inset: auto 0 0 0;
  padding: 1.4rem 1.2rem .95rem;
  background: linear-gradient(to top, rgba(20,19,17,.78), rgba(20,19,17,0));
  color: #fff; opacity: 0; transform: translateY(8px);
  transition: opacity .45s var(--ease), transform .45s var(--ease);
}
.work-item:hover .work-cap, .work-item:focus-visible .work-cap { opacity: 1; transform: none; }
/* Touch devices have no hover — keep captions visible */
@media (hover: none) {
  .work-cap { opacity: 1; transform: none; }
}
.work-cap h3 { margin: 0 0 .2rem; font-size: 1.02rem; font-weight: 500; letter-spacing: .01em; }
.work-cap p { margin: 0; font-size: .78rem; color: rgba(255,255,255,.72); letter-spacing: .04em; }

/* ---------- About ---------- */
.about-grid { display: grid; gap: clamp(2rem, 5vw, 4rem); grid-template-columns: 1fr; }
@media (min-width: 860px) { .about-grid { grid-template-columns: 1.1fr .9fr; } }
.about-lead {
  font-family: var(--serif-jp); font-weight: 400;
  font-size: clamp(1.3rem, 2.6vw, 1.75rem); line-height: 1.5;
  letter-spacing: -.01em; margin: 0 0 1.6rem;
}
.about-body p { color: var(--ink-soft); margin: 0 0 1.1rem; max-width: 56ch; }

.facts { border-top: 1px solid var(--line); }
.fact { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); align-items: start; }
.fact dt { font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; color: var(--muted); padding-top: .15rem; }
.fact dd { margin: 0; font-size: .95rem; color: var(--ink); }
.fact dd span { color: var(--muted); }

.btn-row { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }
.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  border: 1px solid var(--ink); color: var(--ink);
  padding: .72rem 1.3rem; font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; font-weight: 500;
  transition: background .3s var(--ease), color .3s var(--ease), transform .3s var(--ease);
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.alt { border-color: var(--line); color: var(--ink-soft); }
.btn.alt:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn svg { width: 15px; height: 15px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; gap: clamp(2rem, 5vw, 4rem); grid-template-columns: 1fr; }
@media (min-width: 860px) { .contact-grid { grid-template-columns: .9fr 1.1fr; } }
.contact-intro p { color: var(--ink-soft); max-width: 42ch; }
.price-tag {
  margin: 1.6rem 0; padding: 1.2rem 1.4rem; background: var(--paper-2); border: 1px solid var(--line);
}
.price-tag .label { font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; color: var(--muted); }
.price-tag .val { font-family: var(--serif); font-size: 1.5rem; }
.price-tag .val small { font-size: .82rem; color: var(--muted); font-family: var(--sans); }

form { display: grid; gap: 1.1rem; }
.field { display: grid; gap: .4rem; }
.field label { font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.field input, .field textarea {
  font-family: inherit; font-size: .95rem; color: var(--ink);
  background: var(--paper-2); border: 1px solid var(--line); padding: .8rem .9rem;
  border-radius: 0; transition: border-color .3s var(--ease);
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--ink); }
.field textarea { resize: vertical; min-height: 130px; }
form .btn { justify-self: start; border-color: var(--ink); cursor: pointer; background: var(--ink); color: var(--paper); }
form .btn:hover { background: var(--accent); border-color: var(--accent); }
form .btn:disabled { opacity: .55; cursor: default; }
.form-note { font-size: .78rem; color: var(--muted); margin: .2rem 0 0; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-status { margin: .2rem 0 0; font-size: .85rem; padding: .7rem .9rem; border: 1px solid var(--line); }
.form-status.sending { color: var(--muted); }
.form-status.ok { color: #2f6b40; border-color: #b9d8c2; background: #f1f7f2; }
.form-status.err { color: #9a3b34; border-color: #e3c2bf; background: #faf1f0; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 2.5rem 0; margin-top: 2rem; }
.site-footer .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.site-footer p { margin: 0; font-size: .8rem; color: var(--muted); }
.social { display: flex; gap: 1.2rem; align-items: center; }
.social a { font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); transition: color .3s var(--ease); }
.social a:hover { color: var(--accent); }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 100; display: none;
  align-items: center; justify-content: center;
  background: rgba(18,17,15,.94); padding: 4vh 4vw;
  opacity: 0; transition: opacity .35s var(--ease);
}
.lightbox.open { display: flex; opacity: 1; }
.lightbox img, .lightbox video { max-width: 100%; max-height: 92vh; box-shadow: 0 30px 80px rgba(0,0,0,.5); }
.lightbox .lb-cap { position: absolute; bottom: 2.2vh; left: 0; right: 0; text-align: center; color: rgba(255,255,255,.78); font-size: .85rem; letter-spacing: .04em; }
.lightbox .lb-close { position: absolute; top: 2.4vh; right: 3vw; background: none; border: 0; color: #fff; cursor: pointer; padding: .5rem; }
.lightbox .lb-close svg { width: 26px; height: 26px; }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .001ms !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
  /* keep reveal content visible without the entrance motion */
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ---------- Mobile nav ---------- */
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: .5rem 0; transform: translateY(-12px);
    transition: transform .4s var(--ease), opacity .3s var(--ease), visibility .4s var(--ease);
    pointer-events: none; visibility: hidden; opacity: 0;
  }
  .nav.open { transform: none; pointer-events: auto; visibility: visible; opacity: 1; }
  .nav a { padding: .9rem clamp(1.2rem, 5vw, 3rem); width: 100%; font-size: .9rem; }
  .nav a::after { display: none; }
  .fact { grid-template-columns: 1fr; gap: .25rem; }
  .fact dt { padding-top: 0; }
}