/* ==========================================================================
   Artisans Corporate Site — Design Tokens
   生成り(kinari)紙の上に、墨(sumi)と深緋(kokihi)。静けさの中に一点の緋色。
   ========================================================================== */

:root {
  --color-paper: #F9F9F7;      /* ギャラリーホワイト — base */
  --color-paper-dim: #EFEFEB;  /* わずかに沈めた紙色 — section alternation */
  --color-ink: #201D1A;        /* 墨 — primary text */
  --color-ink-soft: #4A453E;   /* 墨、薄め — secondary text */
  --color-kokihi: #6E2A2E;     /* 深緋 — signature accent */
  --color-kokihi-deep: #501E22;
  --color-hairline: #DFDFDA;   /* 罫線 */
  --color-block: #171410;      /* 一段 — dark ink reversal section */
  --color-block-text: #EFE8D8;
  --color-brass: #A98753;      /* 金糸 — used only for hover thread & scroll mark */

  --font-display: "Shippori Mincho", "Noto Serif JP", serif;
  --font-body: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;
  --font-latin: "Cormorant", "EB Garamond", serif;

  --measure: 40rem;
  --nav-h: 4.75rem;
  --ease-quiet: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.9;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: var(--color-kokihi); color: var(--color-block-text); }

:focus-visible {
  outline: 2px solid var(--color-kokihi);
  outline-offset: 3px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.5;
  margin: 0;
  letter-spacing: 0.02em;
  text-wrap: balance;
}

p { margin: 0 0 1.2em; }
p:last-child { margin-bottom: 0; }

p, li, dd, blockquote {
  text-wrap: pretty;
  overflow-wrap: break-word;
}

.latin {
  font-family: var(--font-latin);
  font-style: italic;
  letter-spacing: 0.03em;
}

.wrap {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 6vw;
}

/* ---------------------------------- Nav ---------------------------------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(249, 249, 247, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-hairline);
}

.site-nav .wrap {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-ink);
}

.brand-mark img { height: 28px; width: auto; display: block; }

.site-footer .brand-mark img { height: 32px; }

#nav-links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-quiet), color 0.3s var(--ease-quiet);
}

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

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding-left: 2rem;
  border-left: 1px solid var(--color-hairline);
}

.lang-switch a {
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--color-ink-soft);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-quiet), color 0.3s var(--ease-quiet);
}

.lang-switch a:hover,
.lang-switch a[aria-current="page"] {
  color: var(--color-ink);
  border-color: var(--color-kokihi);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-ink);
}
.nav-toggle svg { width: 22px; height: 22px; }

@media (max-width: 780px) {
  #nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-hairline);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.28s var(--ease-quiet), transform 0.28s var(--ease-quiet);
    max-height: calc(100svh - var(--nav-h));
    overflow-y: auto;
  }
  #nav-links.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-links { flex-direction: column; align-items: stretch; gap: 0; width: 100%; }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block;
    padding: 1.1rem 6vw;
    width: 100%;
    border-bottom: 1px solid var(--color-hairline);
  }
  .lang-switch {
    width: 100%;
    border-left: none;
    border-top: none;
    padding: 1.1rem 6vw;
    gap: 1.2rem;
  }
  .nav-toggle { display: inline-flex; }
}

/* ---------------------------------- Hero ---------------------------------- */

.hero {
  position: relative;
  min-height: calc(100svh - var(--nav-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--color-hairline);
}

.hero .wrap {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4vw;
  align-items: center;
}

.hero-vertical {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.5em;
  color: var(--color-kokihi);
  padding-right: 0.2rem;
  border-right: 1px solid var(--color-hairline);
  opacity: 0;
  transform: translateY(14px);
  animation: rise 1s var(--ease-quiet) 0.15s forwards;
  height: min(60vh, 420px);
}

.hero-copy {
  opacity: 0;
  transform: translateY(16px);
  animation: rise 1s var(--ease-quiet) 0.4s forwards;
}

.eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  color: var(--color-ink-soft);
  margin-bottom: 1.4rem;
}

.eyebrow-caps { text-transform: uppercase; }

.hero-copy h1 {
  font-size: clamp(2.1rem, 5.4vw, 3.7rem);
  max-width: 15ch;
}

.hero-copy .lede {
  margin-top: 1.6rem;
  max-width: 34rem;
  font-size: 1.05rem;
  color: var(--color-ink-soft);
}

@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 640px) {
  .hero .wrap { grid-template-columns: auto 1fr; gap: 5vw; }
  .hero-vertical { height: 44vh; font-size: 0.92rem; letter-spacing: 0.4em; }
}

/* ------------------------------- Sections -------------------------------- */

section { padding: 7rem 0; }

.band {
  border-top: 1px solid var(--color-hairline);
  border-bottom: 1px solid var(--color-hairline);
  background: var(--color-paper-dim);
}

.band .wrap { text-align: center; }

.band p {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.55rem);
  max-width: 30ch;
  margin: 0 auto;
  line-height: 1.85;
}

.section-head {
  max-width: 34rem;
  margin-bottom: 3.5rem;
}

.section-head .eyebrow { margin-bottom: 1rem; }

.section-head h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
}

.section-head .lede {
  margin-top: 1.1rem;
  color: var(--color-ink-soft);
}

/* ----------------------------- Ink block (dark) ---------------------------- */

.ink-block {
  background: var(--color-block);
  color: var(--color-block-text);
}

.ink-block .wrap {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 4rem;
  align-items: start;
}

.ink-block .eyebrow { color: var(--color-brass); }

.ink-block blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  line-height: 1.9;
}

.ink-block figcaption {
  margin-top: 1.6rem;
  font-size: 0.88rem;
  color: #B7AE9A;
  letter-spacing: 0.04em;
}

.ink-block .facts {
  border-top: 1px solid #3A342B;
  padding-top: 1.8rem;
  display: grid;
  gap: 1.4rem;
}

.ink-block .facts .stat {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  font-size: 0.95rem;
  color: #CFC7B2;
}

.ink-block .facts .stat strong {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-block-text);
  white-space: nowrap;
}

.ink-block .facts .stat span small {
  display: block;
  color: #8A8271;
  font-size: 0.78rem;
  margin-top: 0.2rem;
}

@media (max-width: 780px) {
  .ink-block .wrap { grid-template-columns: 1fr; gap: 2.6rem; }
}

/* ------------------------------ Business grid ------------------------------ */

.biz-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--color-hairline);
}

.biz-item {
  display: grid;
  grid-template-columns: 10rem 1fr auto;
  gap: 2.5rem;
  align-items: start;
  padding: 2.6rem 0;
  border-bottom: 1px solid var(--color-hairline);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s var(--ease-quiet), transform 0.7s var(--ease-quiet);
}

.biz-item.is-visible { opacity: 1; transform: translateY(0); }

.biz-tag {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-kokihi);
}

.biz-tag .latin {
  display: block;
  font-size: 0.98rem;
  color: var(--color-ink-soft);
  margin-top: 0.35rem;
}

.biz-body h3 {
  font-size: 1.25rem;
  margin-bottom: 0.7rem;
}

.biz-body p { color: var(--color-ink-soft); max-width: 40rem; }

.biz-link {
  align-self: center;
  white-space: nowrap;
  font-size: 0.88rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--color-kokihi);
  transition: opacity 0.3s;
}
.biz-link:hover { opacity: 0.6; }

@media (max-width: 720px) {
  .biz-item { grid-template-columns: 1fr; gap: 0.9rem; }
  .biz-link { justify-self: start; }
}

/* --------------------------------- Buttons -------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 2.1rem;
  border: 1px solid var(--color-ink);
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  transition: background 0.3s var(--ease-quiet), color 0.3s var(--ease-quiet);
}
.btn:hover { background: var(--color-ink); color: var(--color-paper); }

.btn-invert {
  border-color: var(--color-block-text);
}
.btn-invert:hover { background: var(--color-block-text); color: var(--color-block); }

/* --------------------------------- Footer --------------------------------- */

.site-footer {
  border-top: 1px solid var(--color-hairline);
  padding: 4rem 0 3rem;
  background: var(--color-paper-dim);
}

.site-footer .wrap {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 2.5rem;
}

.site-footer h4 {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  margin-bottom: 1.1rem;
  font-family: var(--font-body);
}

.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 0.6rem; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--color-kokihi); }

.footer-bottom {
  margin-top: 3.5rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--color-hairline);
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
}

@media (max-width: 720px) {
  .site-footer .wrap { grid-template-columns: 1fr; gap: 2.2rem; }
}

/* ------------------------------ Page hero (sub) ---------------------------- */

.page-hero {
  padding: 5.5rem 0 4rem;
  border-bottom: 1px solid var(--color-hairline);
}

.page-hero h1 {
  font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  max-width: 18ch;
}

.page-hero .lede {
  margin-top: 1.3rem;
  max-width: 40rem;
  color: var(--color-ink-soft);
}

/* --------------------------------- Tables --------------------------------- */

.fact-table {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--color-hairline);
}

.fact-table tr { border-bottom: 1px solid var(--color-hairline); }

.fact-table th, .fact-table td {
  text-align: left;
  padding: 1.5rem 0;
  vertical-align: top;
}

.fact-table th {
  width: 11rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  font-size: 0.92rem;
  letter-spacing: 0.03em;
}

@media (max-width: 640px) {
  .fact-table th, .fact-table td { display: block; padding: 0; }
  .fact-table tr { padding: 1.4rem 0; display: block; }
  .fact-table th { margin-bottom: 0.5rem; }
}

/* -------------------------------- Timeline-ish ----------------------------- */

.roadmap {
  display: grid;
  gap: 2.2rem;
  border-top: 1px solid var(--color-hairline);
  padding-top: 2.6rem;
}

.roadmap-step { display: grid; grid-template-columns: 6rem 1fr; gap: 1.6rem; }
.roadmap-step .phase { font-family: var(--font-latin); font-style: italic; color: var(--color-kokihi); font-size: 1.05rem; }
.roadmap-step h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.roadmap-step p { color: var(--color-ink-soft); margin: 0; }

@media (max-width: 560px) {
  .roadmap-step { grid-template-columns: 1fr; gap: 0.4rem; }
}

/* -------------------------------- Utilities -------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.8s var(--ease-quiet), transform 0.8s var(--ease-quiet);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

.center { text-align: center; }