/* emura-light — v2 デザインシステム（Community Light） */

:root {
  --color-bg: #faf8f4;
  --color-surface: #f3efe7;
  --color-ink: #1c1b18;
  --color-muted: #5c5a53;
  --color-line: rgba(28, 27, 24, 0.12);
  --color-line-strong: rgba(28, 27, 24, 0.2);

  --color-dark: #231c16;       /* hero / CTA band */
  --color-dark-2: #2c231b;
  --color-ink-btn: #17302a;    /* nav CTA / dark UI fills */
  --color-ink-btn-hover: #1f3d35;
  --color-footer: #10201b;     /* footer */

  --color-accent: #c27c21;     /* amber — light bg: buttons, numbers, icons */
  --color-accent-ink: #17130a; /* text on amber */
  --color-glow: #e2a348;       /* amber — dark bg: glow, highlight word */

  --color-ivory: #faf8f4;
  --color-ivory-2: #f2efe8;
  --color-ivory-muted: rgba(250, 248, 244, 0.68);
  --color-ivory-line: rgba(250, 248, 244, 0.16);

  --font-sans: "Zen Kaku Gothic New", "Instrument Sans", system-ui, sans-serif;

  --radius: 4px;
  --edge: clamp(20px, 5.4vw, 84px);
  --max: 1360px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { font-family: var(--font-sans); font-weight: 700; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; }

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

@keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@keyframes emGlow { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }
@keyframes emDraw { from { stroke-dashoffset: 620; } to { stroke-dashoffset: 0; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  [data-rise] { opacity: 1 !important; transform: none !important; }
}

/* ---------- layout ---------- */
.wrap { max-width: var(--max); margin: 0 auto; padding-inline: var(--edge); }
.section { padding-block: clamp(64px, 9vw, 132px); }
.section--tight { padding-block: clamp(40px, 6vw, 80px); }
.section--dark { background: var(--color-dark); color: var(--color-ivory); }
.section--surface { background: var(--color-surface); }

.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(18px, 2.4vw, 32px); }
.grid > * { grid-column: span 12; }
@media (min-width: 860px) {
  .c-4 { grid-column: span 4; }
  .c-5 { grid-column: span 5; }
  .c-6 { grid-column: span 6; }
  .c-7 { grid-column: span 7; }
  .c-8 { grid-column: span 8; }
}

.rule { height: 1px; background: var(--color-line); border: 0; margin: 0; }
.rule--strong { background: var(--color-line-strong); }
.rule--inverse { background: var(--color-ivory-line); }

/* ---------- text elements ---------- */
.eyebrow {
  display: inline-block; font-family: var(--font-sans); font-weight: 700; font-size: 13px;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-accent);
}
.eyebrow--inverse { color: var(--color-glow); }

.num { font-family: var(--font-sans); font-weight: 700; font-variant-numeric: tabular-nums; color: var(--color-muted); }

.title-xl { font-size: clamp(2.2rem, 6vw, 5.2rem); line-height: 1.14; letter-spacing: -0.02em; }
.title-lg { font-size: clamp(1.9rem, 3.6vw, 3.1rem); line-height: 1.18; letter-spacing: -0.02em; }
.title-md { font-size: clamp(1.3rem, 2vw, 1.7rem); line-height: 1.3; }

.lede { font-size: clamp(15px, 1.1vw, 17px); line-height: 1.9; color: var(--color-muted); max-width: 42ch; }
.lede--inverse { color: var(--color-ivory-muted); }

/* ---------- buttons / links ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-sans); font-weight: 700; font-size: 15.5px;
  padding: 16px 26px; border-radius: var(--radius);
  border: 1px solid transparent; transition: background .25s ease, color .25s ease, border-color .25s ease;
}
.btn-amber { background: var(--color-accent); color: var(--color-accent-ink); }
.btn-amber:hover { background: #d68b2c; }
.btn-outline { border-color: var(--color-line-strong); color: var(--color-ink); }
.btn-outline:hover { border-color: var(--color-ink); }
.btn-outline--inverse { border-color: var(--color-ivory-line); color: var(--color-ivory); }
.btn-outline--inverse:hover { border-color: var(--color-ivory); }
.btn-dark { background: var(--color-ink-btn); color: var(--color-ivory); }
.btn-dark:hover { background: var(--color-ink-btn-hover); }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-sans); font-weight: 700; font-size: 15px;
  border-bottom: 1px solid var(--color-line-strong); padding-bottom: 4px;
  transition: border-color .25s ease, color .25s ease;
}
.link-arrow span { display: inline-block; transition: transform .3s cubic-bezier(.22,.8,.26,1); }
.link-arrow:hover { border-color: var(--color-accent); color: var(--color-accent); }
.link-arrow:hover span { transform: translateX(4px); }
.link-arrow--inverse { color: var(--color-ivory); border-color: var(--color-ivory-line); }
.link-arrow--inverse:hover { border-color: var(--color-glow); color: var(--color-glow); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 18px var(--edge);
  background: color-mix(in srgb, var(--color-bg) 96%, transparent);
  border-bottom: 1px solid transparent;
  transition: padding-block .3s ease, border-color .3s ease;
}
.site-header.is-scrolled { padding-block: 12px; border-bottom-color: var(--color-line); }
.progress-bar { position: absolute; left: 0; bottom: -1px; height: 2px; width: 0; background: var(--color-accent); }

.brand { display: flex; align-items: center; gap: 9px; color: var(--color-ink); }
.brand-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-accent); flex: none; }
.brand-word { font-family: var(--font-sans); font-weight: 700; font-size: 18px; }

.nav { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 34px); font-size: 14.5px; font-weight: 500; }
.nav a:not(.nav-cta) { color: var(--color-ink); position: relative; padding-bottom: 2px; }
.nav a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -3px; height: 1px; background: var(--color-accent);
  transition: right .3s cubic-bezier(.22,.8,.26,1);
}
.nav a:hover::after, .nav a[aria-current="page"]::after { right: 0; }
.nav-cta {
  font-family: var(--font-sans); font-weight: 700; font-size: 14px; color: var(--color-ivory);
  background: var(--color-ink-btn); border-radius: var(--radius);
  padding: 11px 18px; transition: background .25s ease;
}
.nav-cta:hover { background: var(--color-ink-btn-hover); }
.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav {
    position: fixed; inset: 62px 0 0 0; background: var(--color-bg);
    flex-direction: column; align-items: flex-start; padding: 28px var(--edge); gap: 22px;
    transform: translateX(100%); transition: transform .3s ease; overflow-y: auto;
  }
  .nav.open { transform: translateX(0); }
  .nav a { font-size: 1.05rem; width: 100%; }
  .nav-cta { margin-top: 6px; }
  .nav-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border: 1px solid var(--color-line); border-radius: var(--radius);
    background: none; cursor: pointer; flex: none;
  }
  .nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
    content: ""; display: block; width: 16px; height: 1px; background: var(--color-ink); position: relative; transition: .2s;
  }
  .nav-toggle span::before { position: absolute; top: -5px; }
  .nav-toggle span::after { position: absolute; top: 5px; }
}

/* ---------- hero ---------- */
.hero { position: relative; padding-block: clamp(56px, 7vw, 96px) clamp(64px, 8vw, 120px); overflow: hidden; }
.hero-eyebrow { font-family: var(--font-sans); font-weight: 700; font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-glow); display: inline-flex; align-items: center; gap: 12px; }
.hero-eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--color-glow); }
.hero-title { margin-top: 20px; color: var(--color-ivory); }
.hero-title .light-word { color: var(--color-glow); }
.hero-lede { margin-top: clamp(20px, 2.4vw, 26px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: clamp(28px, 3.2vw, 40px); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 24px; margin-top: clamp(28px, 3.2vw, 40px); padding-top: 22px; border-top: 1px solid var(--color-ivory-line); font-size: 13px; color: var(--color-ivory-muted); }
.hero-visual { display: flex; align-items: center; justify-content: center; }
.hero-visual svg circle, .hero-visual svg path { }

/* ---------- kickers ---------- */
.kicker { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-sans); font-weight: 700; font-size: 12.5px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--color-accent); }

/* ---------- issues ---------- */
.issue-group__head { padding-bottom: 18px; border-bottom: 1px solid var(--color-line-strong); margin-bottom: clamp(20px, 2.4vw, 30px); }
.issue-group__title { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 14px; }
.issue-group__title h3 { font-size: clamp(19px, 1.8vw, 23px); }
.issue-group__note { margin-top: 8px; font-size: 13.5px; color: var(--color-muted); }

.issue-row { display: grid; grid-template-columns: 44px 1fr; gap: 16px; padding-block: clamp(16px, 1.8vw, 22px); }
.issue-row__num { font-family: var(--font-sans); font-size: 17px; font-weight: 700; color: var(--color-line-strong); line-height: 1.6; }
.issue-row__title { font-size: 16.5px; font-weight: 700; line-height: 1.5; }
.issue-row__text { margin-top: 6px; font-size: 14px; line-height: 1.85; color: var(--color-muted); }

/* ---------- service ---------- */
.service-row { border-top: 1px solid var(--color-line-strong); padding-block: clamp(36px, 4.6vw, 56px); }
.service-row:last-child { border-bottom: 1px solid var(--color-line-strong); }
.service-row__grid { display: grid; grid-template-columns: 1fr; gap: 28px; align-items: center; }
@media (min-width: 860px) { .service-row__grid { grid-template-columns: 1.3fr 0.9fr; gap: clamp(32px, 4vw, 64px); } }
.service-row__num { font-family: var(--font-sans); font-size: clamp(28px, 2.8vw, 34px); font-weight: 700; color: var(--color-accent); }
.service-row__head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 14px; }
.service-row__label { font-family: var(--font-sans); font-weight: 700; font-size: 12.5px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--color-muted); }
.service-row__title { font-size: clamp(21px, 2.2vw, 27px); margin-bottom: 14px; }
.service-row__desc { font-size: 14.5px; line-height: 1.95; color: var(--color-muted); max-width: 52ch; margin-bottom: 18px; }
.service-row__visual { display: flex; align-items: center; justify-content: center; }
.service-row__visual svg { display: block; }

/* ---------- flow ---------- */
.flow-track { position: relative; margin-top: clamp(40px, 5vw, 64px); height: 1px; background: var(--color-line-strong); }
.flow-track__dot { position: absolute; top: 50%; transform: translate(-50%, -50%); width: 9px; height: 9px; border-radius: 50%; background: var(--color-line-strong); }
.flow-track__dot--accent { background: var(--color-accent); width: 11px; height: 11px; }
.flow-list { margin-top: clamp(24px, 3vw, 36px); display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr)); gap: clamp(20px, 2vw, 28px); }
.flow-item__num { font-family: var(--font-sans); font-weight: 700; font-size: 13px; color: var(--color-muted); }
.flow-item__title { margin: 10px 0 8px; font-size: 17px; }
.flow-item__text { font-size: 13.5px; line-height: 1.85; color: var(--color-muted); }

/* ---------- who ---------- */
.who-info { margin-top: clamp(24px, 3vw, 34px); display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; }
.who-info__cell { border-top: 1px solid var(--color-line-strong); padding: 16px 20px 16px 0; }
.who-info dt { font-family: var(--font-sans); font-weight: 700; font-size: 12px; letter-spacing: 0.05em; color: var(--color-muted); margin-bottom: 6px; }
.who-info dd { margin: 0; font-size: 15px; font-weight: 700; }

/* ---------- works ---------- */
.work-feature { display: grid; grid-template-columns: 1fr; gap: clamp(24px, 3vw, 44px); }
@media (min-width: 860px) { .work-feature { grid-template-columns: 1.2fr 1fr; align-items: center; } }
.work-feature__body { display: flex; flex-direction: column; gap: 14px; }
.work-feature__title { font-size: clamp(21px, 2vw, 26px); }
.work-feature__sub { font-size: 13.5px; color: var(--color-muted); margin-top: -8px; }
.work-feature__desc { font-size: 14.5px; line-height: 1.9; color: var(--color-muted); max-width: 46ch; }

/* ---------- cta band ---------- */
.cta-band { text-align: center; }
.cta-band__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: clamp(28px, 3vw, 40px); }

/* ---------- spec tables ---------- */
.spec { width: 100%; border-collapse: collapse; }
.spec th, .spec td { text-align: left; vertical-align: top; padding: 18px 4px; font-size: 14.5px; line-height: 1.9; border-bottom: 1px solid var(--color-line); }
.spec th { width: 30%; font-family: var(--font-sans); font-weight: 700; font-size: 12.5px; letter-spacing: 0.05em; color: var(--color-muted); white-space: nowrap; }
.spec tr:last-child th, .spec tr:last-child td { border-bottom: 0; }
.spec .strong { font-size: 17px; font-weight: 700; }
@media (max-width: 560px) {
  .spec th, .spec td { display: block; width: auto; border-bottom: 0; padding: 4px 2px; }
  .spec tr { display: block; padding: 14px 0; border-bottom: 1px solid var(--color-line); }
}

/* ---------- device mock (works) ---------- */
.device-mock { position: relative; padding-bottom: clamp(34px, 6vw, 56px); }
.device-mock__desktop { border: 10px solid var(--color-ink); border-radius: 10px; overflow: hidden; background: var(--color-ink); }
.device-mock__desktop img { display: block; width: 100%; height: auto; }
.device-mock__stand { width: 84px; height: 30px; margin: 0 auto; background: var(--color-ink); clip-path: polygon(38% 0, 62% 0, 76% 100%, 24% 100%); }
.device-mock__phone {
  position: absolute; left: -4%; bottom: 0;
  width: clamp(96px, 24%, 168px);
  border: 7px solid var(--color-ink); border-radius: 22px; overflow: hidden;
  background: var(--color-ink); box-shadow: 0 16px 34px rgba(17, 19, 15, .32);
}
.device-mock__phone img { display: block; width: 100%; height: auto; }
.device-mock__phone::before {
  content: ""; position: absolute; top: 7px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 4px; border-radius: 3px; background: var(--color-ink); z-index: 2;
}

/* ---------- footer ---------- */
.site-footer { background: var(--color-footer); color: var(--color-ivory); padding-block: clamp(56px, 7vw, 96px) clamp(28px, 3vw, 40px); }
.footer-top { display: grid; grid-template-columns: 1fr; gap: 40px; }
@media (min-width: 860px) { .footer-top { grid-template-columns: 1.4fr auto auto; } }
.footer-brand { display: flex; align-items: center; gap: 9px; font-family: var(--font-sans); font-weight: 700; font-size: 18px; margin-bottom: 16px; }
.footer-tagline { font-size: 18px; font-weight: 700; line-height: 1.5; max-width: 20ch; margin-bottom: 20px; }
.footer-nav-label { display: block; font-family: var(--font-sans); font-weight: 700; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-ivory-muted); margin-bottom: 14px; }
.footer-nav { display: flex; flex-direction: column; gap: 11px; font-size: 14px; }
.footer-nav a:hover { color: var(--color-glow); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: clamp(44px, 5vw, 68px); padding-top: 20px; border-top: 1px solid var(--color-ivory-line); font-size: 12.5px; color: var(--color-ivory-muted); }

/* ---------- scroll reveal ---------- */
[data-rise] { opacity: 0; transform: translateY(18px); transition: opacity .8s cubic-bezier(.22,.8,.26,1), transform .8s cubic-bezier(.22,.8,.26,1); will-change: transform, opacity; }
[data-rise].is-visible { opacity: 1; transform: none; }