/* Lingo Japan CMS — platform (landing / signup) */
:root {
  --pf-ink: #1c1917;
  --pf-soft: #57534e;
  --pf-accent: #b32d2e;
  --pf-line: #e7e5e4;
  --pf-bg: #faf9f7;
}
* { box-sizing: border-box; }
body.pf-body {
  margin: 0; color: var(--pf-ink); background: var(--pf-bg);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, system-ui, sans-serif;
  line-height: 1.75; display: flex; flex-direction: column; min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
code { font-family: ui-monospace, Menlo, monospace; background: #eeece8; border-radius: 4px; padding: 1px 7px; font-size: .9em; }

.pf-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(16px, 5vw, 48px); border-bottom: 1px solid var(--pf-line); background: #fff;
}
.pf-logo { font-weight: 800; font-size: 1.2rem; color: var(--pf-accent); letter-spacing: .02em; }
.pf-main { flex: 1; }

.pf-btn {
  display: inline-block; font-weight: 700; border-radius: 8px; padding: 9px 20px;
  font-size: .92rem; border: 1px solid transparent; cursor: pointer; font-family: inherit;
}
.pf-btn-primary { background: var(--pf-accent); color: #fff; }
.pf-btn-primary:hover { background: #952525; }
.pf-btn-ghost { border-color: var(--pf-line); background: #fff; }
.pf-btn-ghost:hover { border-color: var(--pf-accent); color: var(--pf-accent); }
.pf-btn-lg { padding: 13px 32px; font-size: 1rem; }

.pf-hero { text-align: center; padding: clamp(48px, 10vw, 110px) 20px 40px; }
.pf-hero h1 { font-size: clamp(1.7rem, 4.5vw, 2.7rem); line-height: 1.4; margin: 0 0 18px; font-weight: 800; }
.pf-lead { color: var(--pf-soft); max-width: 640px; margin: 0 auto 30px; font-size: 1.02rem; }
.pf-sub { color: var(--pf-soft); font-size: .85rem; margin-top: 16px; }

.pf-features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px;
  max-width: 1020px; margin: 30px auto 80px; padding: 0 20px;
}
.pf-feature { background: #fff; border: 1px solid var(--pf-line); border-radius: 12px; padding: 22px 24px; }
.pf-feature h3 { margin: 0 0 8px; font-size: 1.02rem; }
.pf-feature p { margin: 0; color: var(--pf-soft); font-size: .9rem; }

.pf-form-card {
  background: #fff; border: 1px solid var(--pf-line); border-radius: 14px;
  max-width: 460px; margin: clamp(30px, 7vw, 70px) auto; padding: 34px 36px;
  box-shadow: 0 12px 44px rgba(0,0,0,.05);
}
.pf-form-card h1 { font-size: 1.35rem; margin: 0 0 18px; }
.pf-field { display: block; margin-bottom: 15px; }
.pf-field > span { display: block; font-size: .8rem; font-weight: 700; color: var(--pf-soft); margin-bottom: 5px; }
.pf-field input {
  width: 100%; font-family: inherit; font-size: .95rem; padding: 10px 12px;
  border: 1px solid var(--pf-line); border-radius: 8px; outline-color: var(--pf-accent);
}
.pf-subdomain-row { display: flex; align-items: center; gap: 8px; }
.pf-suffix { color: var(--pf-soft); font-size: .9rem; white-space: nowrap; }
.pf-form .pf-btn { width: 100%; margin-top: 8px; }
.pf-error {
  background: #fdf0f0; color: var(--pf-accent); border: 1px solid #f0c4c4;
  border-radius: 8px; padding: 10px 14px; font-size: .88rem; font-weight: 600; margin-bottom: 16px;
}
.pf-done { text-align: center; }
.pf-done .pf-btn { width: auto; margin-top: 10px; }
.pf-cred { color: var(--pf-soft); font-size: .9rem; }

.pf-footer {
  text-align: center; color: var(--pf-soft); font-size: .8rem;
  padding: 26px; border-top: 1px solid var(--pf-line); background: #fff;
}