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

:root {
  --bg: #FFFFFF;
  --bg-soft: #F4F6FB;
  --surface: #FFFFFF;
  --surface-2: #F7F8FB;
  --text: #111827;
  --muted: #5B6578;
  --border: #E6E8EE;
  --accent: #2563EB;
  --accent-soft: #E8EFFE;
  --danger: #E11D48;
  --ok: #059669;
  --radius: 16px;
  --page: 1120px;
}

html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .bar, .page, .site-footer .bar {
  max-width: var(--page);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.site-header .bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  min-height: 64px;
  padding-top: 10px;
  padding-bottom: 10px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 750;
  letter-spacing: -0.03em;
  color: var(--text);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--accent); color: #fff;
  display: grid; place-items: center;
  font-weight: 750; font-size: 15px;
}
.brand span:not(.mark) { color: var(--accent); }
.nav-links { display: flex; gap: 4px; min-width: 0; }
body.app-mode .for-guest { display: none; }
body.app-mode { background: var(--bg-soft); }
body.app-mode .site-footer { background: var(--bg-soft); border-top-color: transparent; }
.nav-links a {
  color: var(--muted); font-size: 14px; font-weight: 650;
  padding: 8px 12px; border-radius: 999px; text-decoration: none;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--bg-soft); }
.nav-right { display: flex; align-items: center; gap: 10px; }
.session {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 4px 4px 12px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--bg-soft);
}
.session-email { font-size: 12px; color: var(--muted); max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.langToggle { display: flex; gap: 2px; padding: 3px; border-radius: 999px; border: 1px solid var(--border); background: var(--bg-soft); }
.langToggle button { padding: 6px 10px; border-radius: 999px; border: 0; background: transparent; color: var(--muted); cursor: pointer; font-size: 12px; font-weight: 650; }
.langToggle button.active { background: #fff; color: var(--text); }

.band { padding: 72px 0; }
.band.soft { background: var(--bg-soft); }
.band.tight { padding: 28px 0 8px; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 48px;
  align-items: center;
}
.page-kicker { font-size: 12px; color: var(--accent); font-weight: 750; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px; }
h1 { margin: 0 0 14px; font-size: 52px; letter-spacing: -0.045em; line-height: 1.05; font-weight: 750; }
h2 { margin: 0 0 8px; font-size: 28px; letter-spacing: -0.03em; }
h3 { margin: 0 0 6px; font-size: 16px; }
.tagline, .sub, p, li { color: var(--muted); font-size: 16px; line-height: 1.55; }
.tagline { margin: 0 0 22px; max-width: 460px; font-size: 18px; }
.sub { margin: 0 0 14px; }

.product { background: #fff; border: 1px solid var(--border); border-radius: 18px; overflow: hidden; box-shadow: 0 24px 60px rgba(17,24,39,.08); }
.product-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--border); color: var(--muted); font-size: 12px; font-weight: 650; }
.product-bar i { width: 8px; height: 8px; border-radius: 99px; background: #E6E8EE; display: block; }
.product-bar em { margin-left: 8px; font-style: normal; }
.product-body { display: grid; grid-template-columns: 1.15fr .85fr; min-height: 300px; }
.product-col { padding: 16px; }
.product-col + .product-col { border-left: 1px solid var(--border); background: var(--surface-2); }
.product-label { font-size: 11px; font-weight: 750; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.line { font-size: 13px; color: var(--text); margin: 0 0 10px; line-height: 1.45; }
.line b { display: block; font-size: 11px; color: var(--accent); margin-bottom: 2px; }
.line.dim { color: var(--muted); }
.suggest { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 12px; font-size: 13px; color: var(--text); line-height: 1.45; margin-bottom: 14px; }

.section-head { max-width: 640px; margin-bottom: 28px; }
.features, .steps, .pricing { display: grid; gap: 16px; }
.features, .steps, .pricing { grid-template-columns: repeat(3, 1fr); }
.feature, .step, .planCard, .card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.band.soft .feature, .band.soft .step, .band.soft .planCard { background: #fff; }
.step strong { display: block; color: var(--accent); margin-bottom: 6px; font-size: 13px; }
.planCard.featured { border: 2px solid var(--accent); box-shadow: 0 12px 32px rgba(37,99,235,.12); }
.planName { font-weight: 750; font-size: 16px; }
.badge { display: inline-block; margin-left: 8px; font-size: 11px; color: var(--accent); font-weight: 750; background: var(--accent-soft); padding: 2px 8px; border-radius: 999px; }
.price { font-size: 36px; margin-top: 10px; letter-spacing: -0.04em; font-weight: 750; color: var(--text); }
.per { color: var(--muted); font-size: 14px; margin-left: 4px; font-weight: 500; }
.bul { margin: 14px 0 0; padding-left: 18px; }
.bul li { margin: 8px 0; font-size: 14px; }

.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
.login-card { max-width: none; }

.account {
  display: grid;
  gap: 28px;
  align-items: start;
  grid-template-columns: 240px minmax(0, 1fr);
  padding-top: 28px;
  padding-bottom: 64px;
}
.side {
  position: sticky;
  top: 88px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 10px;
}
.side a {
  display: block;
  padding: 11px 12px;
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}
.side a:hover, .side a.active { background: var(--bg-soft); text-decoration: none; color: var(--text); }
.side-label { font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); padding: 6px 12px 8px; font-weight: 750; }
.account-main { display: grid; gap: 16px; min-width: 0; }
.card.nested { background: var(--surface-2); }
.dash-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.account-main h1 { font-size: 32px; }
.guide h1 { font-size: 40px; }

label { display: block; font-size: 12px; color: var(--muted); margin: 0 0 6px; font-weight: 650; }
input, select {
  width: 100%; padding: 11px 12px; border-radius: 10px;
  border: 1px solid var(--border); background: #fff; color: var(--text); outline: none; font-size: 14px;
}
input:focus, select:focus { border-color: var(--accent); }
button {
  padding: 10px 14px; border-radius: 10px; border: 1px solid var(--border);
  background: #fff; color: var(--text); cursor: pointer; font-size: 14px; font-weight: 650;
}
button:hover { background: var(--bg-soft); }
button.primary { border-color: transparent; background: var(--accent); color: #fff; }
button.primary:hover { background: #1D4ED8; }
button.danger { border-color: transparent; background: #FFF1F2; color: var(--danger); }
button.ghost { background: transparent; }
.btn-link { text-decoration: none; color: inherit; }
.btn-link:hover { text-decoration: none; }
.actions, .cta-row { display: flex; gap: 10px; margin-top: 16px; align-items: center; flex-wrap: wrap; }
.formGrid { display: grid; gap: 12px; }
.field { display: grid; gap: 6px; }
.hint, .footer { color: var(--muted); font-size: 13px; }
.footer { margin-top: 14px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.status { margin-top: 10px; font-size: 13px; color: var(--muted); white-space: pre-wrap; }
.ok { color: var(--ok); }
.err { color: var(--danger); }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 10px 12px; align-items: center; }
.pill { display: inline-block; padding: 3px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--text); font-size: 12px; background: #fff; max-width: 100%; overflow-wrap: anywhere; }
.pill.ok { color: var(--ok); }
.pill.err { color: var(--danger); }
.pill.warn { color: var(--accent); }
.fatal { border-color: #FECDD3; margin: 16px auto; max-width: var(--page); }
.guide h2 { margin: 28px 0 8px; color: var(--text); font-size: 20px; }
.guide ul { margin: 0; padding-left: 18px; }
.guide li { margin: 8px 0; }

.site-footer { border-top: 1px solid var(--border); padding: 28px 0 40px; background: #fff; }
.site-footer .bar { display: flex; justify-content: space-between; gap: 16px; align-items: center; flex-wrap: wrap; }
.site-footer a { color: var(--muted); font-size: 13px; margin-right: 14px; }
.site-footer p { margin: 0; font-size: 13px; }

@media (max-width: 900px) {
  h1 { font-size: 34px; }
  .hero-grid, .split, .features, .steps, .pricing, .dash-grid, .product-body, .account, .kv { grid-template-columns: 1fr; }
  .product-col + .product-col { border-left: 0; border-top: 1px solid var(--border); }
  .site-header .bar { grid-template-columns: 1fr auto; }
  .nav-links { grid-column: 1 / -1; }
  .side { position: static; }
  .band { padding: 40px 0; }
}