/* landings/shared/style.css — shared base styles for Sprint 分支 B landings */

:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5a5a5a;
  --accent: #1e6fff;
  --accent-dark: #0a4ec4;
  --border: #e5e5e5;
  --soft: #f7f7f8;
  --good: #1a9d50;
  --warn: #b35900;
  --maxw: 760px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 32px 20px 64px; }

header.brand {
  padding: 16px 0 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
  font-size: 14px;
  color: var(--muted);
}

h1 {
  font-size: 34px;
  line-height: 1.2;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 22px;
  margin: 36px 0 12px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 17px;
  margin: 20px 0 6px;
}

p { margin: 0 0 14px; }

.lede {
  font-size: 19px;
  color: var(--muted);
  margin-bottom: 24px;
}

ul, ol { padding-left: 22px; margin: 8px 0 18px; }
li { margin: 4px 0; }

.points {
  display: grid;
  gap: 14px;
  margin: 24px 0 8px;
}
.point {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  background: var(--soft);
}
.point strong { display: block; margin-bottom: 4px; }

.sample-link {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px;
  margin: 12px 0;
  background: var(--bg);
  font-weight: 500;
}
.sample-link::before { content: "📄 "; }

.pricing {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 18px 0;
}
@media (min-width: 560px) {
  .pricing { grid-template-columns: 1fr 1fr 1fr; }
}
.price {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
  background: var(--bg);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  font: inherit;
  color: inherit;
  width: 100%;
}
.price:hover { border-color: var(--accent); background: var(--soft); }
.price[data-state="picked"] { border-color: var(--accent); background: #eef4ff; }
.price .tier { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.price .amount { font-size: 24px; font-weight: 600; margin: 6px 0 2px; }
.price .note { font-size: 12px; color: var(--muted); }

form.signup {
  margin: 20px 0 8px;
  display: grid;
  gap: 10px;
}
form.signup label { font-size: 13px; color: var(--muted); }
form.signup input[type="email"],
form.signup textarea {
  font: inherit;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
  width: 100%;
}
form.signup textarea { min-height: 70px; resize: vertical; }
form.signup input[type="email"]:focus,
form.signup textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}
form.signup .hp { position: absolute; left: -9999px; }
form.signup button {
  font: inherit;
  font-weight: 600;
  padding: 12px 14px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  cursor: pointer;
}
form.signup button:hover { background: var(--accent-dark); }
form.signup .status { font-size: 13px; color: var(--muted); min-height: 18px; }
form.signup .status[data-state="ok"] { color: var(--good); }
form.signup .status[data-state="err"] { color: var(--warn); }

details.faq {
  border-top: 1px solid var(--border);
  padding: 14px 0;
}
details.faq summary {
  cursor: pointer;
  font-weight: 500;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
details.faq summary::after { content: "+"; color: var(--muted); }
details.faq[open] summary::after { content: "−"; }
details.faq[open] { padding-bottom: 18px; }
details.faq p { color: var(--muted); font-size: 15px; margin: 10px 0 0; }

footer.foot {
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}

.muted { color: var(--muted); }
.small { font-size: 13px; }