/* ============================================
   Naoya Wakita Portfolio — 共通スタイル
   デザイン言語: 生成り#f8f8f2 × 濃紺#061826、
   明朝(Zen Old Mincho)、ヘアライン罫線、誌面風
   ============================================ */
:root {
  --ink: #061826;
  --paper: #f8f8f2;
  --muted: #7d8489;
  --line: rgba(6, 24, 38, 0.18);
  --line-soft: rgba(6, 24, 38, 0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Zen Old Mincho', serif;
  color: var(--ink);
  background: var(--paper);
  font-size: 15px;
  line-height: 2.1;
  letter-spacing: 0.04em;
  font-feature-settings: "palt";
}
h1, h2, h3 { font-weight: 500; line-height: 1.9; letter-spacing: 0.12em; }
p { text-align: justify; }
a { color: var(--ink); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 40px; }
section { padding: 104px 0; }

/* Site header / nav */
.site-head {
  border-bottom: 1px solid var(--line);
}
.site-head .wrap {
  display: flex; justify-content: space-between; align-items: baseline;
  padding-top: 28px; padding-bottom: 20px;
}
.site-head .logo {
  font-size: 15px; letter-spacing: 0.18em; text-decoration: none;
}
.site-head .logo small {
  display: block;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 10px; color: var(--muted); letter-spacing: 0.14em;
}
.site-nav {
  display: flex; gap: 40px;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 12px; letter-spacing: 0.16em;
}
.site-nav a { text-decoration: none; padding-bottom: 4px; }
.site-nav a:hover { border-bottom: 1px solid var(--ink); }
.site-nav a.current { border-bottom: 1px solid var(--ink); }

/* Page title (下層ページ冒頭) */
.page-title { padding: 72px 0 0; }
.page-title h1 { font-size: 13px; font-family: 'Noto Sans JP', sans-serif; font-weight: 400; letter-spacing: 0.24em; }
.page-title .ja { font-size: 26px; font-family: 'Zen Old Mincho', serif; letter-spacing: 0.14em; margin-top: 8px; display: block; }

/* Label row: "Case Study ————— Idencity | 2025.04 —" */
.label-row {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 12px; letter-spacing: 0.12em;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 64px;
}
.label-row .meta { color: var(--muted); letter-spacing: 0.1em; }

/* Read more link */
.more {
  display: inline-flex; align-items: baseline; gap: 40px;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 13px; letter-spacing: 0.1em;
  text-decoration: none;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ink);
  transition: opacity .25s;
}
.more::after { content: "➤"; font-size: 10px; }
.more:hover { opacity: 0.55; }

.tags {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 12px; letter-spacing: 0.08em;
  color: var(--muted);
}
.tags span { margin-right: 1.2em; }

/* Hero(トップのみ) */
.hero { padding: 72px 0 104px; }
.hero-grid {
  display: grid;
  grid-template-columns: 44% 1fr;
  gap: 72px;
  align-items: start;
}
.hero-photo img {
  width: 100%; aspect-ratio: 4 / 5; object-fit: cover; display: block;
}
.hero-photo figcaption {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 11px; color: var(--muted); letter-spacing: 0.08em;
  margin-top: 12px;
}
.hero-text h1 { font-size: 27px; margin-bottom: 32px; }
.hero-text .who {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 12px; letter-spacing: 0.12em; color: var(--muted);
  margin-bottom: 44px;
}
.hero-text .who b { color: var(--ink); font-weight: 500; font-size: 14px; margin-right: 14px; }
.growth {
  display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap;
  margin-bottom: 40px;
}
.growth .num { font-size: 44px; letter-spacing: 0.06em; line-height: 1; }
.growth .from { font-size: 22px; color: var(--muted); }
.growth .arrow { font-size: 22px; }
.growth .unit { font-family: 'Noto Sans JP', sans-serif; font-size: 12px; color: var(--muted); letter-spacing: 0.08em; }
.hero-text .lead { margin-bottom: 36px; }
.hero-text .tags { margin-bottom: 56px; }

/* Stats */
.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 0; }
.stats .wrap { display: grid; grid-template-columns: repeat(3, 1fr); }
.stat { padding: 44px 24px; text-align: center; border-left: 1px solid var(--line-soft); }
.stat:first-child { border-left: none; }
.stat .v { font-size: 28px; letter-spacing: 0.1em; line-height: 1.5; }
.stat .k { font-family: 'Noto Sans JP', sans-serif; font-size: 11px; color: var(--muted); letter-spacing: 0.08em; margin-top: 6px; }

/* Case study */
.case-grid { display: grid; grid-template-columns: 5fr 6fr; gap: 72px; margin-bottom: 72px; }
.case-grid h2 { font-size: 24px; }
.case-grid .body p { margin-bottom: 28px; }
.before-after {
  display: flex; align-items: baseline; gap: 20px; flex-wrap: wrap;
  padding: 26px 0; margin-bottom: 28px;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.before-after .ba { font-size: 20px; letter-spacing: 0.08em; }
.before-after .ba small {
  display: block;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 11px; color: var(--muted); letter-spacing: 0.1em;
}
.before-after .arrow { font-size: 20px; color: var(--muted); }
.measures { list-style: none; }
.measures li {
  padding: 26px 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
}
.measures li:last-child { border-bottom: 1px solid var(--line-soft); }
.measures li b { font-weight: 500; font-size: 15px; letter-spacing: 0.1em; }
.measures li span { font-size: 14px; color: var(--muted); line-height: 2; display: block; text-align: justify; }

/* Works cards */
.works-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; row-gap: 72px; }
.work .work-label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 11px; letter-spacing: 0.12em;
  padding-bottom: 10px; margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.work .work-label .meta { color: var(--muted); }
.work .frame { position: relative; width: 100%; padding-top: 56.25%; background: #e8e6de; overflow: hidden; }
.work .frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.yt-thumb {
  position: absolute; inset: 0; width: 100%; height: 100%;
  border: 0; padding: 0; cursor: pointer; display: block; background: none;
}
.yt-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: opacity .3s; }
.yt-thumb:hover img { opacity: .8; }
.yt-thumb .play {
  position: absolute; right: 14px; bottom: 14px;
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(248, 248, 242, 0.92);
  display: flex; align-items: center; justify-content: center;
  transition: background .2s;
}
.yt-thumb:hover .play { background: #fff; }
.yt-thumb .play::after {
  content: ""; display: block; margin-left: 3px;
  border-style: solid; border-width: 6px 0 6px 10px;
  border-color: transparent transparent transparent var(--ink);
}
.work h3 { font-size: 16px; line-height: 2; letter-spacing: 0.08em; margin-top: 22px; }
.work .how { font-size: 13px; color: var(--muted); line-height: 2; margin-top: 12px; text-align: justify; }
.work .tags { margin-top: 14px; }
.work .more { margin-top: 26px; width: 100%; justify-content: space-between; }

/* Services / Contactメニュー */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 56px; }
.service h3 { font-size: 17px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.service .for {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 11px; color: var(--muted); letter-spacing: 0.1em;
  margin: 12px 0 6px;
}
.service ul { list-style: none; }
.service li {
  font-size: 14px; padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.9;
}
.strength {
  margin-top: 72px; text-align: center;
  font-size: 17px; letter-spacing: 0.12em; line-height: 2.2;
}

/* Career */
.career { list-style: none; }
.career li {
  display: grid; grid-template-columns: 300px 1fr; gap: 32px;
  padding: 28px 0; border-top: 1px solid var(--line-soft);
}
.career li:last-child { border-bottom: 1px solid var(--line-soft); }
.career .org { font-size: 16px; letter-spacing: 0.1em; }
.career .desc { font-family: 'Noto Sans JP', sans-serif; font-size: 13px; color: var(--muted); letter-spacing: 0.06em; align-self: center; }

/* About */
.about-grid { display: grid; grid-template-columns: 5fr 6fr; gap: 72px; }
.about-grid h2 { font-size: 24px; }
.about-grid .name { font-size: 20px; letter-spacing: 0.16em; margin-bottom: 4px; }
.about-grid .name-en {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 11px; color: var(--muted); letter-spacing: 0.2em;
  margin-bottom: 32px;
}
.about-grid .body p { margin-bottom: 24px; }
.gear { list-style: none; }
.gear li {
  display: grid; grid-template-columns: 160px 1fr; gap: 24px;
  font-size: 14px;
  padding: 14px 0; border-bottom: 1px solid var(--line-soft);
}
.gear li:first-child { border-top: 1px solid var(--line-soft); }
.gear .g-label { font-family: 'Noto Sans JP', sans-serif; font-size: 12px; color: var(--muted); letter-spacing: 0.1em; align-self: center; }

/* Stance */
.stance blockquote {
  max-width: 720px; margin: 0 auto;
  font-size: 17px; line-height: 2.4; letter-spacing: 0.1em;
  text-align: justify;
}

/* Contact */
.contact-cta { text-align: center; }
.contact-cta .note {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 13px; color: var(--muted); letter-spacing: 0.08em;
  margin-bottom: 48px; text-align: center;
}
.btn {
  display: inline-block;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 13px; letter-spacing: 0.2em;
  color: var(--ink); text-decoration: none;
  border: 1px solid var(--ink);
  padding: 18px 72px;
  transition: background .25s, color .25s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.contact-info {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 12px; color: var(--muted); letter-spacing: 0.08em;
  margin-top: 28px; text-align: center;
}

/* Footer */
.site-foot { border-top: 1px solid var(--line-soft); padding: 40px 0 48px; }
.site-foot .wrap {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 11px; color: var(--muted); letter-spacing: 0.14em;
}
.site-foot nav { display: flex; gap: 28px; }
.site-foot a { color: var(--muted); text-decoration: none; }
.site-foot a:hover { color: var(--ink); }

@media (max-width: 800px) {
  .wrap { padding: 0 24px; }
  section { padding: 72px 0; }
  .label-row { margin-bottom: 44px; }
  .site-head .wrap { flex-direction: column; gap: 12px; padding-top: 20px; }
  .site-nav { gap: 28px; }
  .page-title { padding-top: 48px; }
  .hero { padding: 48px 0 72px; }
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-photo img { aspect-ratio: 4 / 3; }
  .hero-text h1 { font-size: 22px; }
  .growth { flex-direction: column; align-items: flex-start; gap: 2px; }
  .growth .num { font-size: 38px; }
  .growth .from, .growth .arrow { font-size: 20px; }
  .stats .wrap { grid-template-columns: 1fr; }
  .stat { border-left: none; border-top: 1px solid var(--line-soft); text-align: left; padding: 28px 0; }
  .stat:first-child { border-top: none; }
  .case-grid { grid-template-columns: 1fr; gap: 32px; margin-bottom: 44px; }
  .measures li { grid-template-columns: 1fr; gap: 6px; padding: 20px 0; }
  .works-grid, .services-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .career li { grid-template-columns: 1fr; gap: 4px; }
  .site-foot .wrap { flex-direction: column; gap: 16px; }
}