/* ═══════════════════════════════════════════════════════════════════
   Macro Logic / Ai-Co — Design System v2 (2026-07-07)
   Modern & Bold · Papaya Orange palette · 3-language (JA/EN/ZH-Hant)
   Shared by all pages. Page-specific styles live in each page <style>.
   ═══════════════════════════════════════════════════════════════════ */

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

:root {
  /* Brand palette */
  --papaya: #FF7A1A;
  --papaya-deep: #E86800;
  --papaya-light: #FFE4D1;
  --ink: #1E1E1E;
  --mint: #10B981;

  /* Derived */
  --ink-2: #3A3733;
  --muted: #77716B;
  --bg: #FFFCF9;
  --surface: #FFFFFF;
  --line: rgba(30, 30, 30, .09);
  --dark: #0E0C0A;
  --dark-2: #191512;
  --grad: linear-gradient(120deg, #FF9A4D 0%, #FF7A1A 45%, #E86800 100%);
  --grad-text: linear-gradient(100deg, #FFB37A, #FF7A1A 60%, #FF9A4D);

  /* Shape & shadow */
  --r-lg: 28px;
  --r-md: 18px;
  --r-sm: 12px;
  --shadow-1: 0 2px 8px rgba(30,30,30,.05), 0 12px 32px rgba(30,30,30,.07);
  --shadow-papaya: 0 12px 36px rgba(255,122,26,.35);

  /* Type */
  --font-body: "Manrope", "Noto Sans JP", "Noto Sans TC", ui-sans-serif,
    system-ui, -apple-system, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100% }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block }
a { color: var(--papaya-deep) }

.container { max-width: 1160px; margin: auto; padding: 0 24px }
.container-narrow { max-width: 820px; margin: auto; padding: 0 24px }

/* ── i18n: language show/hide ─────────────────────────────────────
   Markup: <span class="L ja">…</span><span class="L en">…</span><span class="L zh">…</span>
   html[data-lang] is set by assets/i18n.js (default: ja)              */
.L { display: none !important }
html[data-lang="ja"] .L.ja,
html[data-lang="en"] .L.en,
html[data-lang="zh"] .L.zh { display: contents !important }

/* ── Header / Nav ─────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  background: rgba(255, 252, 249, .82);
  border-bottom: 1px solid var(--line);
}
.site-header.on-dark {
  background: rgba(14, 12, 10, .72);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.nav-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: inherit; min-width: 0 }
.on-dark .brand { color: #fff }
.brand-logo { height: 34px; width: 34px; border-radius: 9px }
.brand-name { font-weight: 800; font-size: 17px; letter-spacing: -.02em; white-space: nowrap }
.brand-sep { width: 1px; height: 18px; background: var(--line) }
.on-dark .brand-sep { background: rgba(255,255,255,.2) }
.brand-product { font-size: 14px; font-weight: 800; color: var(--papaya); white-space: nowrap }

.nav-links { display: flex; align-items: center; gap: 2px }
.nav-links a {
  color: var(--ink-2); text-decoration: none;
  padding: 8px 13px; border-radius: 99px;
  font-size: 13.5px; font-weight: 600; transition: .18s;
  white-space: nowrap;
}
.on-dark .nav-links a { color: rgba(255,255,255,.78) }
.nav-links a:hover { background: rgba(255,122,26,.1); color: var(--papaya-deep) }
.on-dark .nav-links a:hover { background: rgba(255,255,255,.1); color: #fff }
.nav-links a.active { color: var(--papaya-deep); background: rgba(255,122,26,.12) }
.nav-cta {
  background: var(--grad) !important; color: #fff !important;
  padding: 9px 18px !important; border-radius: 99px !important;
  font-weight: 800 !important;
  box-shadow: 0 6px 18px rgba(255,122,26,.32);
}
.nav-cta:hover { transform: translateY(-1px) }

/* Language switcher */
.lang-switch {
  display: inline-flex; align-items: center;
  background: rgba(30,30,30,.06);
  border-radius: 99px; padding: 3px; gap: 2px;
}
.on-dark .lang-switch { background: rgba(255,255,255,.1) }
.lang-switch button {
  border: none; background: transparent; cursor: pointer;
  font-family: inherit; font-size: 11.5px; font-weight: 700;
  color: var(--muted); padding: 5px 10px; border-radius: 99px;
  transition: .18s; letter-spacing: .02em;
}
.on-dark .lang-switch button { color: rgba(255,255,255,.6) }
.lang-switch button[aria-pressed="true"] {
  background: var(--surface); color: var(--papaya-deep);
  box-shadow: 0 1px 4px rgba(0,0,0,.12);
}
.on-dark .lang-switch button[aria-pressed="true"] { background: #fff }

/* Mobile drawer */
.menu-btn { display: none; background: none; border: none; cursor: pointer; padding: 8px }
.menu-btn svg rect { fill: var(--ink) }
.on-dark .menu-btn svg rect { fill: #fff }
.drawer { display: none }
@media (max-width: 920px) {
  .nav-links { display: none }
  .menu-btn { display: flex; align-items: center }
  .drawer {
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(255,252,249,.97); backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
  }
  .on-dark .drawer { background: rgba(14,12,10,.97) }
  .drawer a {
    display: block; padding: 15px 24px; border-top: 1px solid var(--line);
    font-size: 15px; font-weight: 600; color: var(--ink); text-decoration: none;
  }
  .on-dark .drawer a { color: #fff; border-top-color: rgba(255,255,255,.08) }
  .drawer.open { display: block }
}

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: inherit; font-size: 15px; font-weight: 800;
  padding: 15px 30px; border-radius: 99px; border: none; cursor: pointer;
  text-decoration: none; transition: .22s; letter-spacing: -.01em;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: var(--shadow-papaya) }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 44px rgba(255,122,26,.45) }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.22) }
.btn-ghost:hover { background: rgba(255,255,255,.16) }
.btn-outline { background: transparent; color: var(--ink); border: 1.5px solid rgba(30,30,30,.18) }
.btn-outline:hover { border-color: var(--papaya); color: var(--papaya-deep) }
.btn-dark { background: var(--ink); color: #fff }
.btn-dark:hover { background: #000; transform: translateY(-2px) }

/* ── Section primitives ───────────────────────────────────────── */
.section { padding: clamp(72px, 10vw, 128px) 0 }
.section-dark { background: var(--dark); color: #fff }
.section-tint { background: linear-gradient(180deg, var(--bg) 0%, var(--papaya-light) 130%) }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11.5px; font-weight: 800; letter-spacing: .16em;
  text-transform: uppercase; color: var(--papaya-deep);
  margin-bottom: 18px;
}
.eyebrow::before { content: ''; width: 22px; height: 2px; background: var(--grad); border-radius: 2px }
.section-dark .eyebrow { color: #FF9A52 }

.display {
  font-size: clamp(34px, 5.4vw, 68px);
  font-weight: 800; line-height: 1.08; letter-spacing: -.035em;
}
.title {
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 800; line-height: 1.14; letter-spacing: -.03em;
}
.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.lead { font-size: clamp(15px, 1.7vw, 18px); color: var(--muted); line-height: 1.8 }
.section-dark .lead { color: rgba(255,255,255,.62) }

/* ── Cards ────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 56px rgba(255,122,26,.13);
  border-color: rgba(255,122,26,.3);
}
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--papaya-light); color: var(--papaya-deep);
  font-size: 12.5px; font-weight: 800;
  padding: 7px 15px; border-radius: 99px;
}
.chip-mint { background: rgba(16,185,129,.12); color: #059669 }

/* ── Marquee ──────────────────────────────────────────────────── */
.marquee {
  overflow: hidden; white-space: nowrap;
  background: var(--grad);
  padding: 15px 0;
  transform: rotate(0deg);
}
.marquee-track {
  display: inline-block;
  animation: marquee 28s linear infinite;
}
.marquee-track span {
  color: #fff; font-weight: 800; font-size: 14.5px;
  letter-spacing: .04em; margin: 0 26px;
}
.marquee-track .dot { opacity: .55 }
@keyframes marquee { from { transform: translateX(0) } to { transform: translateX(-50%) } }
@media (prefers-reduced-motion: reduce) { .marquee-track { animation: none } }

/* ── Prose (legal / manual / text pages) ─────────────────────── */
.prose { font-size: 15px; line-height: 1.95; color: var(--ink-2) }
.prose h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; letter-spacing: -.03em; line-height: 1.2; color: var(--ink); margin: 0 0 14px }
.prose h2 { font-size: clamp(20px, 2.4vw, 26px); font-weight: 800; letter-spacing: -.02em; color: var(--ink); margin: 52px 0 16px; padding-top: 28px; border-top: 1px solid var(--line) }
.prose h3 { font-size: 17px; font-weight: 800; color: var(--ink); margin: 32px 0 10px }
.prose p { margin: 0 0 16px }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 24px }
.prose li { margin-bottom: 6px }
.prose table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px }
.prose th { background: var(--papaya-light); color: var(--ink); font-weight: 800; text-align: left }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 14px; vertical-align: top }
.prose strong { color: var(--ink) }
.prose a { color: var(--papaya-deep); font-weight: 600 }
.doc-meta { font-size: 13px; color: var(--muted); margin-bottom: 40px }
.doc-note {
  background: var(--papaya-light); border-radius: var(--r-md);
  padding: 16px 20px; font-size: 13.5px; color: var(--ink-2);
  margin-bottom: 36px;
}

/* Page hero for sub pages */
.page-hero {
  position: relative; overflow: hidden;
  background: var(--dark); color: #fff;
  padding: clamp(72px, 9vw, 120px) 0 clamp(56px, 7vw, 96px);
}
.page-hero::before {
  content: ''; position: absolute;
  width: 900px; height: 500px; right: -200px; top: -220px;
  background: radial-gradient(ellipse, rgba(255,122,26,.32) 0%, transparent 68%);
  pointer-events: none;
}
.page-hero::after {
  content: ''; position: absolute;
  width: 600px; height: 400px; left: -180px; bottom: -260px;
  background: radial-gradient(ellipse, rgba(232,104,0,.18) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero .container, .page-hero .container-narrow { position: relative; z-index: 2 }
.page-hero .lead { color: rgba(255,255,255,.6); margin-top: 16px; max-width: 640px }

/* ── Footer ───────────────────────────────────────────────────── */
.site-footer {
  background: var(--dark); color: rgba(255,255,255,.55);
  padding: clamp(48px, 6vw, 80px) 0 40px;
  font-size: 13.5px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 48px;
}
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr } }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; font-size: 16px; margin-bottom: 14px }
.footer-brand img { height: 30px; width: 30px; border-radius: 8px }
.footer-tag { line-height: 1.8; max-width: 300px }
.footer-col h4 {
  color: #fff; font-size: 12px; font-weight: 800;
  letter-spacing: .14em; text-transform: uppercase; margin-bottom: 16px;
}
.footer-col a {
  display: block; color: rgba(255,255,255,.55); text-decoration: none;
  padding: 5px 0; transition: .18s;
}
.footer-col a:hover { color: var(--papaya) }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 26px;
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 12px;
}
.footer-bottom .lang-switch { background: rgba(255,255,255,.08) }
.footer-bottom .lang-switch button { color: rgba(255,255,255,.55) }
.footer-bottom .lang-switch button[aria-pressed="true"] { background: rgba(255,255,255,.92); color: var(--papaya-deep) }

/* ── Reveal on scroll ─────────────────────────────────────────── */
[data-reveal] {
  opacity: 0; transform: translateY(28px);
  transition: opacity .7s cubic-bezier(.2,.65,.3,1), transform .7s cubic-bezier(.2,.65,.3,1);
}
[data-reveal].revealed { opacity: 1; transform: translateY(0) }
[data-reveal-delay="1"] { transition-delay: .1s }
[data-reveal-delay="2"] { transition-delay: .2s }
[data-reveal-delay="3"] { transition-delay: .3s }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none }
}