/* 拾得 Ensō — site styles. Understated, warm, editorial: ivory paper, navy
   display ink, gold hairlines, cinnabar seal accent. Mirrors the app. */
:root {
  color-scheme: light;
  --paper: #f5f0e6;
  --paper-2: #efe7d8;
  --paper-hi: #faf6ee;
  --ink: #2b2420;
  --ink-soft: #6f5f54;
  --navy: #16243d;
  --navy-soft: #33425c;
  --cinnabar: #a4472d;
  --cinnabar-deep: #8f3a22;
  --gold: #a97e3c;
  --gold-bright: #c39a4c;
  --sage: #5f7a5c;
  --rule: rgba(169, 126, 60, 0.30);
  --rule-soft: rgba(120, 96, 60, 0.16);
  --card: rgba(255, 253, 248, 0.68);
  --card-line: rgba(120, 96, 60, 0.20);
  --shadow: 0 20px 55px rgba(84, 58, 30, 0.10);
  --shadow-soft: 0 10px 30px rgba(84, 58, 30, 0.08);
  --shadow-shot: 0 30px 70px rgba(40, 33, 55, 0.18);
  --serif: "New York", ui-serif, "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, serif;
  --sans: ui-sans-serif, -apple-system, system-ui, "PingFang SC", "Hiragino Sans", "Segoe UI", sans-serif;
  font-family: var(--serif);
  line-height: 1.75;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(1100px 560px at 88% -6%, rgba(195, 154, 76, 0.16), transparent 60%),
    radial-gradient(900px 520px at 6% 2%, rgba(22, 36, 61, 0.06), transparent 55%),
    linear-gradient(180deg, var(--paper-hi) 0%, var(--paper) 34rem);
  background-attachment: fixed;
}

a {
  color: var(--cinnabar);
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(164, 71, 45, 0.4);
}
a:hover { text-decoration-color: currentColor; }

.skip-link { position: absolute; left: -9999px; top: 0; }
.skip-link:focus {
  left: 1rem; top: 1rem; padding: 0.6rem 1rem;
  background: #fff; border-radius: 0.6rem; z-index: 20;
}

/* ---------- header ---------- */
.site-header {
  width: min(74rem, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 1.35rem 0 1.1rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  border-bottom: 1px solid var(--rule);
}
.brand {
  color: var(--navy);
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.16rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  white-space: nowrap;
}
nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.15rem; flex: 1; }
nav a,
.language-link {
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.01em;
  text-decoration: none;
}
nav a:hover, .language-link:hover { color: var(--cinnabar); }
nav a[aria-current="page"] { color: var(--navy); font-weight: 650; }
.language-switch { font-family: var(--sans); font-size: 0.82rem; color: var(--ink-soft); white-space: nowrap; }
.language-switch strong { color: var(--navy); font-weight: 650; }

/* ---------- main column ---------- */
main {
  width: min(52rem, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: clamp(3.5rem, 9vw, 7rem) 0 4.5rem;
}

/* ---------- hero ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(12rem, 18rem);
  align-items: center;
  gap: clamp(2rem, 7vw, 5rem);
}
.app-mark {
  width: 100%;
  height: auto;
  border-radius: 24%;
  box-shadow: 0 34px 70px rgba(104, 72, 30, 0.26);
  transform: rotate(1.5deg);
  border: 1px solid rgba(255, 255, 255, 0.5);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2rem; }

.eyebrow {
  margin: 0 0 1.15rem;
  color: var(--gold);
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0;
  max-width: 20ch;
  color: var(--navy);
  font-weight: 600;
  font-size: clamp(2.5rem, 6.4vw, 4.6rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.lede {
  max-width: 42rem;
  margin: 1.9rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.06rem, 2.3vw, 1.28rem);
  line-height: 1.7;
}

/* ---------- buttons ---------- */
.primary-cta, .secondary-cta {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.94rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.82rem 1.5rem;
}
.primary-cta {
  margin-top: 0.2rem;
  background: linear-gradient(180deg, var(--cinnabar) 0%, var(--cinnabar-deep) 100%);
  color: #fffaf2;
  box-shadow: var(--shadow-soft);
}
.secondary-cta {
  border: 1px solid var(--rule);
  color: var(--navy);
  background: var(--card);
}

/* ---------- sections ---------- */
section { margin-top: clamp(3.5rem, 8vw, 6rem); }
h2 {
  margin: 0 0 1.4rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
  color: var(--navy);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
}
h3 { color: var(--navy); font-weight: 600; }
p, li, td, th { font-size: 1.02rem; }
p { color: var(--ink); }
ul { padding-left: 1.25rem; }
ul li::marker { color: var(--gold); }
li + li { margin-top: 0.5rem; }

.callout {
  margin-top: 1.6rem;
  padding: 1.15rem 1.35rem;
  border: 1px solid var(--card-line);
  border-left: 3px solid var(--gold);
  border-radius: 0 0.8rem 0.8rem 0;
  background: var(--card);
  color: var(--ink);
  box-shadow: var(--shadow-soft);
}

/* ---------- table ---------- */
.table-wrap {
  overflow-x: auto;
  margin-top: 1.6rem;
  border: 1px solid var(--card-line);
  border-radius: 1rem;
  background: var(--card);
  box-shadow: var(--shadow-soft);
}
table { width: 100%; min-width: 34rem; border-collapse: collapse; }
th, td {
  padding: 0.9rem 1.15rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--rule-soft);
}
th {
  color: var(--navy-soft);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
tr:last-child td { border-bottom: 0; }

/* ---------- cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1.1rem;
}
.text-card {
  min-height: 10rem;
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  border: 1px solid var(--card-line);
  border-radius: 1.1rem;
  background: var(--card);
  color: var(--navy);
  text-decoration: none;
  box-shadow: var(--shadow-soft);
}
.text-card strong { font-family: var(--serif); font-size: 1.12rem; font-weight: 600; }
.text-card span { color: var(--ink-soft); font-size: 0.9rem; line-height: 1.6; }

/* ---------- FAQ ---------- */
.faq-list details {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
.faq-list summary {
  cursor: pointer;
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before {
  content: "＋";
  color: var(--gold);
  font-weight: 400;
  margin-right: 0.6rem;
}
.faq-list details[open] summary::before { content: "－"; }
.faq-list details p { margin: 0.7rem 0 0.2rem 1.5rem; color: var(--ink-soft); }

.sources a { overflow-wrap: anywhere; }
.sources ol { color: var(--ink-soft); }

/* ---------- screenshot showcase ---------- */
.showcase-lead {
  margin: 0.4rem 0 0;
  color: var(--ink-soft);
  max-width: 40rem;
}
.showcase {
  display: flex;
  gap: clamp(1rem, 2.5vw, 1.6rem);
  margin: 2rem 0 0;
  padding: 0.5rem 0.2rem 1.6rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--rule) transparent;
}
.showcase::-webkit-scrollbar { height: 7px; }
.showcase::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 999px; }
.shot {
  flex: 0 0 auto;
  width: clamp(15rem, 62vw, 20rem);
  height: auto;
  scroll-snap-align: center;
  border-radius: 1.6rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow-shot);
  background: var(--paper-hi);
}
.showcase-hint {
  margin-top: 0.2rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}
/* single inline screenshot (feature pages) */
.figure-shot {
  display: block;
  width: min(20rem, 72%);
  height: auto;
  margin: 2rem auto 0;
  border-radius: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--shadow-shot);
}

/* ---------- footer ---------- */
footer {
  width: min(74rem, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 2.2rem 0 3.2rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-family: var(--sans);
}
footer p { font-size: 0.82rem; line-height: 1.7; }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .site-header { align-items: flex-start; flex-wrap: wrap; row-gap: 0.7rem; }
  nav { order: 3; flex-basis: 100%; }
  .language-switch { margin-left: auto; }
  .hero { grid-template-columns: 1fr; }
  .app-mark { grid-row: 1; width: min(9rem, 40vw); transform: rotate(0deg); }
}

@media (prefers-reduced-motion: no-preference) {
  a, .text-card, .primary-cta, .secondary-cta, .shot {
    transition: color 160ms ease, transform 200ms ease, box-shadow 200ms ease, text-decoration-color 160ms ease;
  }
  .text-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
  .primary-cta:hover, .secondary-cta:hover { transform: translateY(-2px); }
  .shot:hover { transform: translateY(-4px); }
}