/* Composure — shared styles */
:root {
  --sage: #618078;
  --sage-dark: #4c655e;
  --sage-light: #e8efec;
  --sage-tint: #f4f7f5;
  --ink: #2b302e;
  --muted: #6b736f;
  --line: #dfe6e2;
  --bg: #fbfcfb;
  --white: #ffffff;
  --radius: 16px;
  --maxw: 820px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Segoe UI", Roboto, sans-serif;
  line-height: 1.8;
  font-size: 16px;
  letter-spacing: 0.01em;
}

h1, h2, h3 {
  font-family: "Hiragino Mincho ProN", "YuMincho", Georgia, "Times New Roman", serif;
  color: var(--sage-dark);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

a { color: var(--sage); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 252, 251, 0.9);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-family: "Hiragino Mincho ProN", Georgia, serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--sage-dark);
  letter-spacing: 0.06em;
}
.brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--sage-dark); text-decoration: none; }

.lang-toggle {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--muted);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 13px;
  cursor: pointer;
  letter-spacing: 0.04em;
}
.lang-toggle:hover { border-color: var(--sage); color: var(--sage-dark); }

/* Layout containers */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.page { padding: 56px 0 96px; }

/* Hero (marketing) */
.hero {
  text-align: center;
  padding: 88px 24px 64px;
  background: linear-gradient(180deg, var(--sage-tint) 0%, var(--bg) 100%);
}
.hero .eyebrow {
  display: inline-block;
  color: var(--sage);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero h1 { font-size: clamp(30px, 6vw, 48px); margin: 0 0 20px; }
.hero p.lead {
  max-width: 620px;
  margin: 0 auto 32px;
  font-size: 18px;
  color: var(--muted);
}

.badge-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.appstore-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--ink);
  color: var(--white);
  border-radius: 12px;
  padding: 12px 22px;
  font-size: 15px;
  letter-spacing: 0.02em;
}
.appstore-badge:hover { text-decoration: none; opacity: 0.9; }
.appstore-badge small { display: block; font-size: 10px; opacity: 0.7; letter-spacing: 0.06em; }
.appstore-badge .big { font-size: 17px; font-weight: 600; }

/* Screenshot frames */
.shots {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 56px auto 0;
  max-width: 900px;
}
.shot {
  width: 210px;
  aspect-ratio: 9 / 19.5;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: repeating-linear-gradient(135deg, var(--sage-tint), var(--sage-tint) 12px, var(--sage-light) 12px, var(--sage-light) 24px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.1em;
  box-shadow: 0 12px 40px rgba(76, 101, 94, 0.12);
}

/* Feature cards */
.section-title { text-align: center; font-size: clamp(24px, 4vw, 32px); margin: 0 0 12px; }
.section-sub { text-align: center; color: var(--muted); margin: 0 auto 44px; max-width: 560px; }
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
}
.card .ico {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--sage-light);
  color: var(--sage-dark);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}
.card h3 { font-size: 18px; margin: 0 0 8px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* Privacy highlight banner */
.privacy-banner {
  margin: 72px auto 0;
  max-width: 720px;
  background: var(--sage-dark);
  color: var(--white);
  border-radius: 20px;
  padding: 40px 36px;
  text-align: center;
}
.privacy-banner h2 { color: var(--white); font-size: 26px; margin: 0 0 12px; }
.privacy-banner p { margin: 0 auto; max-width: 520px; opacity: 0.92; }

/* Document pages */
.doc h1 { font-size: clamp(26px, 5vw, 36px); margin: 0 0 8px; }
.doc .updated { color: var(--muted); font-size: 14px; margin: 0 0 40px; }
.doc h2 { font-size: 21px; margin: 40px 0 12px; }
.doc h3 { font-size: 17px; margin: 24px 0 8px; }
.doc p, .doc li { color: #3c433f; }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.callout {
  background: var(--sage-tint);
  border: 1px solid var(--sage-light);
  border-left: 4px solid var(--sage);
  border-radius: 12px;
  padding: 18px 22px;
  margin: 24px 0;
}
.callout strong { color: var(--sage-dark); }

/* FAQ */
.faq details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 4px 20px;
  margin: 12px 0;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--sage-dark);
  padding: 16px 0;
  list-style: none;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  color: var(--sage);
  font-size: 22px;
  line-height: 1;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 18px; color: var(--muted); }

/* Contact box */
.contact-box {
  text-align: center;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 40px;
}
.contact-box a { font-size: 18px; font-weight: 600; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--sage-tint);
  padding: 40px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
.site-footer .foot-links { margin-bottom: 14px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.site-footer .foot-links a { color: var(--muted); }
.site-footer .foot-links a:hover { color: var(--sage-dark); }

/* Language visibility */
[data-lang="en"] .ja { display: none; }
[data-lang="ja"] .en { display: none; }