/* ─────────────────────────────────────────────
   リライト ─ rewrite-co.com トップページ
   Japanese-modern minimal: warm paper, ink, vermilion accent
   ───────────────────────────────────────────── */

:root {
  --paper: #f7f5f1;
  --paper-elev: #fdfcfa;
  --ink: #1e1c19;
  --ink-soft: #4a463f;
  --muted: #8a8177;
  --hairline: #e4dfd5;
  --hairline-strong: #d3ccbe;
  --accent: #a8442f;
  --accent-soft: rgba(168, 68, 47, 0.08);
  --font-display: "Shippori Mincho B1", "Hiragino Mincho ProN", "Hiragino Mincho Pro",
    "Yu Mincho", "YuMincho", "Noto Serif JP", "Nanum Myeongjo", "Songti TC", "SimSun", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic",
    "Meiryo", "Segoe UI", "Malgun Gothic", "Microsoft YaHei", "Microsoft JhengHei",
    "Leelawadee UI", "Noto Sans Thai", sans-serif;
  --wrap: 1040px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 48px);
}

::selection { background: var(--accent); color: var(--paper-elev); }

a { color: inherit; }

/* ── Header ─────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 245, 241, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent);
  color: var(--paper-elev);
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  line-height: 1;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }

.brand-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.brand-roman {
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--muted);
}

/* ── Language switcher ──────────────────── */

.lang-switch { position: relative; }

#langButton {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  background: var(--paper-elev);
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

#langButton:hover { border-color: var(--accent); color: var(--accent); }

#langButton .icon-chevron { transition: transform 0.25s var(--ease); }
#langButton[aria-expanded="true"] .icon-chevron { transform: rotate(180deg); }

#langList {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 200px;
  padding: 6px;
  list-style: none;
  background: var(--paper-elev);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(30, 28, 25, 0.12), 0 2px 8px rgba(30, 28, 25, 0.06);
  animation: menuIn 0.18s var(--ease);
}

@keyframes menuIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

#langList li {
  padding: 9px 12px;
  border-radius: 9px;
  font-size: 14px;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.15s var(--ease), color 0.15s var(--ease);
}

#langList li:hover { background: var(--accent-soft); color: var(--accent); }
#langList li[aria-selected="true"] { color: var(--accent); font-weight: 600; }

/* ── Hero ───────────────────────────────── */

.hero {
  position: relative;
  padding-top: clamp(72px, 12vh, 128px);
  padding-bottom: clamp(56px, 9vh, 96px);
}

.hero::before {
  content: "リ";
  position: absolute;
  top: -40px;
  right: clamp(-20px, 2vw, 60px);
  font-family: var(--font-display);
  font-size: clamp(200px, 30vw, 380px);
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
  opacity: 0.035;
  pointer-events: none;
  user-select: none;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 22px;
}

.kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--accent);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(34px, 6.4vw, 62px);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: 0.04em;
  margin-bottom: 26px;
}

.br-sp { display: none; }

.hero-sub {
  max-width: 620px;
  font-size: clamp(15px, 2vw, 17px);
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.lang-note {
  font-size: 13px;
  color: var(--muted);
}

/* ── Sections ───────────────────────────── */

.services { padding-block: clamp(44px, 7vh, 72px); }

.services + .services { border-top: 1px solid var(--hairline); }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: clamp(28px, 4vh, 40px);
}

.section-num {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--accent);
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.section-sub { font-size: 14px; color: var(--muted); }

/* ── Cards ──────────────────────────────── */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 16px;
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 178px;
  padding: 22px 22px 18px;
  background: var(--paper-elev);
  border: 1px solid var(--hairline);
  border-radius: 16px;
  text-decoration: none;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--hairline-strong);
  box-shadow: 0 14px 34px rgba(30, 28, 25, 0.09);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.card-badge {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  padding: 4px 11px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: var(--paper);
}

.card-arrow {
  font-size: 15px;
  color: var(--muted);
  transition: transform 0.3s var(--ease), color 0.3s var(--ease);
}

.card:hover .card-arrow { transform: translate(3px, -3px); color: var(--accent); }

.card-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.4;
  margin-bottom: 6px;
}

.card-desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.card-domain {
  margin-top: auto;
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.card:hover .card-domain { color: var(--accent); }

/* ── About ──────────────────────────────── */

.about {
  display: grid;
  grid-template-columns: minmax(180px, 280px) 1fr;
  gap: clamp(20px, 4vw, 56px);
  padding-block: clamp(48px, 8vh, 84px);
  border-top: 1px solid var(--hairline);
}

.about h2 {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.about-body {
  max-width: 640px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* ── Footer ─────────────────────────────── */

.site-footer { border-top: 1px solid var(--hairline); }

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-block: 28px;
}

.footer-brand { font-size: 13px; letter-spacing: 0.04em; }

.footer-roman { color: var(--muted); font-size: 12px; letter-spacing: 0.14em; }

.footer-note { font-size: 12px; color: var(--muted); }

/* ── Motion / responsive ────────────────── */

@media (prefers-reduced-motion: no-preference) {
  .hero > *, .section-head, .card, .about > * {
    animation: rise 0.7s var(--ease) both;
  }
  .card:nth-child(2) { animation-delay: 0.04s; }
  .card:nth-child(3) { animation-delay: 0.08s; }
  .card:nth-child(4) { animation-delay: 0.12s; }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (max-width: 720px) {
  .br-sp { display: inline; }
  .about { grid-template-columns: 1fr; }
  .section-head { gap: 14px; }
  .brand-roman { display: none; }
}

@media (max-width: 420px) {
  .cards { grid-template-columns: 1fr; }
}