/* shared.css — pattern-143 common styles */

/* ---- Design tokens ---- */
:root {
  --bg: #0E0E10;
  --bg-2: #15151A;
  --bg-3: #1B1B22;
  --ink: #F5F5F7;
  --ink-2: #C8C8CC;
  --muted: #8A8A8E;
  --silver: #A8A8AA;
  --platinum: #E8E8EA;
  --steel: #2E3A4A;
  --steel-2: #3D4A5C;
  --line: rgba(232,232,234,0.10);
  --line-2: rgba(232,232,234,0.22);
}

/* ---- Reset & base ---- */
* {
  box-sizing: border-box; margin: 0; padding: 0;
  -webkit-tap-highlight-color: rgba(232,232,234,0.08);
}
html {
  background: #0E0E10;
  color-scheme: dark;
  scroll-behavior: smooth;
}
body {
  font-family: 'Inter', 'Noto Sans JP', system-ui, sans-serif;
  background: var(--bg); color: var(--ink);
  line-height: 1.75; font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid rgba(232,232,234,0.72);
  outline-offset: 4px;
}
.mono { font-family: 'JetBrains Mono', monospace; }
img { max-width: 100%; width: auto; height: auto; }

/* ---- Back-bar ---- */
.back-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 9px 22px;
  background: linear-gradient(90deg, #0E0E10 0%, #2E3A4A 100%);
  color: var(--platinum);
  font-size: 12px;
  display: flex; gap: 14px; align-items: center;
  border-bottom: 1px solid var(--line);
}
.back-bar a { color: var(--platinum); text-decoration: none; }
.back-bar a:hover { color: #fff; }
.back-bar .badge {
  color: var(--bg); font-weight: 800;
  background: var(--silver);
  border: 1px solid var(--platinum);
  padding: 2px 10px; border-radius: 4px;
  font-size: 11px; letter-spacing: 0.08em;
}
.back-bar .meta { margin-left: auto; color: var(--silver); font-size: 11px; letter-spacing: 0.18em; font-weight: 700; }

/* ---- Skip link ---- */
.skip-link {
  position: fixed; top: 8px; left: 12px; z-index: 200;
  transform: translateY(-140%);
  background: var(--platinum); color: var(--bg);
  padding: 8px 12px; border-radius: 4px;
  font-weight: 800; text-decoration: none;
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ---- Site header ---- */
header.site {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(14,14,16,0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  padding: 14px 32px;
  display: flex; justify-content: space-between; align-items: center;
}
header.site .brand { display: flex; align-items: center; gap: 10px; }
header.site .brand a { display: inline-flex; }
header.site .brand img { height: 22px; filter: brightness(1.15) contrast(1.05); }
header.site nav ul { display: flex; gap: 28px; list-style: none; font-size: 13px; font-weight: 600; }
header.site nav a {
  color: var(--ink-2); text-decoration: none;
  transition: color 0.2s; letter-spacing: 0.04em;
  position: relative; padding-bottom: 4px;
}
header.site nav a:hover { color: var(--platinum); }
header.site nav a.active { color: var(--platinum); }
header.site nav a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1px; background: linear-gradient(90deg, var(--silver), var(--platinum));
}

/* ---- Mobile nav toggle ---- */
.nav-toggle {
  display: none;
  background: none; border: 0; padding: 8px;
  width: 40px; height: 40px;
  cursor: pointer;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.nav-toggle span {
  display: block; width: 22px; height: 1.5px;
  background: var(--ink); transition: transform 0.3s, opacity 0.3s;
}
header.site.is-open .nav-toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
header.site.is-open .nav-toggle span:nth-child(2) { opacity: 0; }
header.site.is-open .nav-toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---- Language switcher ---- */
.nav-lang {
  display: inline-flex; align-items: center; gap: 8px;
  margin-left: 8px; padding-left: 20px;
  border-left: 1px solid var(--line);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; letter-spacing: 0.08em;
}
.nav-lang a,
.nav-lang .current {
  color: rgba(168,168,170,0.78); text-decoration: none;
  transition: color 0.2s;
  padding: 0 !important; font-weight: 700;
}
.nav-lang .current { color: var(--platinum); }
.nav-lang a:hover { color: var(--platinum); }
.nav-lang a::after { display: none !important; }
.nav-lang .sep { color: var(--silver); opacity: 0.4; }

/* ---- Main offset ---- */
main { padding-top: 90px; }

/* ---- Page hero (base) ---- */
.page-hero {
  position: relative;
  padding: 100px 32px 90px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(46,58,74,0.6) 0%, transparent 60%),
    radial-gradient(ellipse at 90% 70%, rgba(168,168,170,0.08) 0%, transparent 55%),
    linear-gradient(180deg, #0E0E10 0%, #15151A 100%);
}
.page-hero::before {
  content: ''; position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(232,232,234,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232,232,234,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 50%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 50%, #000 30%, transparent 80%);
}
.page-hero-ring {
  position: absolute; top: 50%; right: -10%; transform: translateY(-50%);
  width: 540px; aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: conic-gradient(from 0deg,
    rgba(46,58,74,0.0) 0deg,
    rgba(46,58,74,0.55) 90deg,
    rgba(168,168,170,0.32) 180deg,
    rgba(232,232,234,0.18) 270deg,
    rgba(46,58,74,0.0) 360deg);
  filter: blur(40px);
  opacity: 0.55;
  animation: ringspin 32s linear infinite;
  z-index: 0;
}
@keyframes ringspin { to { transform: translateY(-50%) rotate(360deg); } }
.page-hero-inner {
  position: relative; z-index: 2;
  max-width: 1240px; margin: 0 auto;
}
.ph-text { max-width: 820px; }
.ph-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.36em;
  color: var(--silver); font-weight: 700;
  display: inline-flex; align-items: center; gap: 14px;
  padding: 6px 18px; border-radius: 100px;
  background: rgba(232,232,234,0.04);
  border: 1px solid var(--line-2);
  margin-bottom: 28px;
}
.ph-eyebrow::before, .ph-eyebrow::after {
  content: ''; width: 18px; height: 1px; background: var(--silver); opacity: 0.6;
}
.ph-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; font-weight: 700; letter-spacing: 0.22em;
  padding: 5px 12px; border-radius: 3px;
  background: rgba(46,58,74,0.4);
  border: 1px solid rgba(232,232,234,0.3);
  color: var(--platinum);
  margin-bottom: 22px;
}
.ph-title {
  font-size: clamp(36px, 5.4vw, 76px);
  font-weight: 800; letter-spacing: 0;
  line-height: 1.06; margin-bottom: 16px;
  background: linear-gradient(135deg, var(--platinum) 0%, var(--silver) 60%, var(--steel-2) 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.ph-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px; color: var(--silver); letter-spacing: 0.2em;
  margin-bottom: 28px;
}
.ph-lead {
  color: var(--ink-2); font-size: 17px; max-width: 680px;
  line-height: 1.9;
}
.ph-side {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--silver); letter-spacing: 0.22em;
  writing-mode: vertical-rl;
  padding: 10px 6px;
  border-left: 1px solid var(--line-2);
}

/* ---- Section common ---- */
.section { padding: 110px 32px; position: relative; }
.section.alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-inner { max-width: 1240px; margin: 0 auto; }
.section-inner.narrow { max-width: 880px; }

/* ---- Section heading ---- */
.sec-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--silver); letter-spacing: 0.3em;
  font-weight: 700; margin-bottom: 18px;
  display: inline-flex; align-items: center; gap: 12px;
}
.sec-eyebrow::before { content: ''; width: 28px; height: 1px; background: var(--silver); }
.sec-title {
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: 800; letter-spacing: 0;
  color: var(--platinum); line-height: 1.2;
  margin-bottom: 22px;
}
.sec-title em { color: inherit; font-style: normal; }
.sec-lead {
  color: var(--ink-2); font-size: 15.5px; line-height: 1.95;
  max-width: 780px;
  margin-bottom: 56px;
}

/* ---- CTA section / card ---- */
.cta-section {
  padding: 100px 32px;
  background:
    radial-gradient(ellipse at 80% 30%, rgba(46,58,74,0.55) 0%, transparent 55%),
    linear-gradient(180deg, #15151A 0%, #0E0E10 100%);
  border-top: 1px solid var(--line);
}
.cta-card {
  max-width: 1240px; margin: 0 auto;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(42,42,42,0.45) 0%, transparent 55%),
    linear-gradient(135deg, var(--platinum) 0%, var(--silver) 100%);
  color: var(--bg);
  border-radius: 6px;
  padding: 60px;
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative; overflow: hidden;
}
.cta-card::after {
  content: ''; position: absolute; top: -60%; right: -10%;
  width: 480px; height: 480px;
  background: conic-gradient(from 90deg, rgba(14,14,16,0.18), transparent 60%, rgba(14,14,16,0.12));
  border-radius: 50%;
  animation: ringspin 40s linear infinite;
  pointer-events: none;
}
.cta-card .eb-c {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; font-weight: 700; letter-spacing: 0.28em;
  margin-bottom: 14px; opacity: 0.7; position: relative;
}
.cta-card h2 {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 800; margin-bottom: 14px;
  position: relative; letter-spacing: 0; line-height: 1.3;
}
.cta-card p { color: rgba(14,14,16,0.7); margin-bottom: 0; position: relative; max-width: 520px; font-size: 14.5px; }
.cta-card .actions { display: flex; flex-direction: column; gap: 12px; position: relative; }
.cta-card .btn-c {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px;
  background: var(--bg); color: var(--platinum);
  border-radius: 4px; text-decoration: none;
  font-weight: 700; font-size: 13.5px; letter-spacing: 0.06em;
  transition: transform 0.2s;
  justify-content: center;
}
.cta-card .btn-c:hover { transform: translateY(-2px); }
.cta-card .btn-c.ghost {
  background: transparent; color: var(--bg);
  border: 1px solid rgba(14,14,16,0.35);
}
.cta-card .btn-c.ghost:hover { background: rgba(14,14,16,0.06); }

/* ---- Footer ---- */
footer.site {
  padding: 32px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 12px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
footer.site .mini-logo { display: inline-flex; align-items: center; gap: 8px; }
footer.site .mini-logo img { height: 14px; opacity: 0.6; filter: brightness(1.2); }

/* ---- Reveal animation ---- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 1s, transform 1s; }
.reveal.in { opacity: 1; transform: none; }

/* ---- Responsive: nav ---- */
@media (max-width: 640px) {
  .back-bar { padding: 7px 14px; font-size: 11px; gap: 10px; flex-wrap: wrap; }
  .back-bar .meta { display: none; }
  header.site { padding: 12px 16px; }
  .nav-toggle { display: flex; }
  header.site nav {
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(14,14,16,0.96);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line-2);
    max-height: 0; overflow: hidden;
    transition: max-height 0.35s ease;
  }
  header.site.is-open nav { max-height: 420px; }
  header.site nav ul {
    flex-direction: column; gap: 0;
    padding: 16px 24px;
    font-size: 14px;
  }
  header.site nav ul li { padding: 14px 0; border-bottom: 1px solid var(--line); }
  header.site nav ul li:last-child { border-bottom: 0; }
  header.site nav a.active::after { display: none; }
  .nav-lang {
    border-left: 0; margin-left: 0; padding-left: 0;
    padding: 18px 0 6px !important;
    border-top: 1px solid var(--line);
    margin-top: 8px; width: 100%; justify-content: center;
    gap: 18px; border-bottom: 0 !important;
  }
  .page-hero { padding: 70px 22px 60px; }
  .section { padding: 70px 22px; }
  .cta-section { padding: 60px 22px; }
}

/* ---- Responsive: CTA ---- */
@media (max-width: 1024px) {
  .cta-card { grid-template-columns: 1fr; padding: 44px 28px; }
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
}