/* Katayama pre-launch page — self-contained, no external fonts or scripts. */

:root {
  --ink: #0a1d3f;
  --ink-deep: #03112b;
  --text: #253451;
  --muted: #5f6b80;
  --hairline: #e4e8ef;
  --accent: #1957c2;
  --wash: #f5f7fc;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", Meiryo, ui-sans-serif, system-ui, sans-serif;
  color: var(--text);
  background: #ffffff;
  line-height: 1.9;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

.container {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-wide {
  max-width: 66rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

a:hover {
  text-decoration: underline;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--hairline);
  background: #ffffff;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
}

.brand:hover {
  text-decoration: none;
}

.brand-logo {
  width: 2.25rem;
  height: 2.25rem;
  flex: none;
}

.brand-name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header-nav a {
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text);
}

.header-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.lang-link {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--muted) !important;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  white-space: nowrap;
}

.lang-link:hover {
  color: var(--accent) !important;
  border-color: var(--accent);
}

/* Hero */

.hero {
  position: relative;
  background-image:
    linear-gradient(100deg, rgba(3, 17, 43, 0.88) 0%, rgba(10, 29, 63, 0.62) 55%, rgba(10, 29, 63, 0.35) 100%),
    url("/assets/hero.jpg");
  background-size: cover;
  background-position: center;
  color: #ffffff;
  padding: 7.5rem 0;
}

.hero-copy {
  max-width: 36rem;
}

.hero-kicker {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.9rem);
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1.35;
}

.tagline {
  margin-top: 1.1rem;
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.85);
}

/* Wide tracking suits CJK display text but stretches Latin — tighten on the EN page. */
:lang(en) .hero h1 {
  letter-spacing: 0.02em;
}

:lang(en) .tagline {
  letter-spacing: 0.02em;
}

/* Sections */

.section {
  padding: 5.5rem 0;
}

.kicker {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-heading {
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-bottom: 1rem;
}

:lang(en) .section-heading {
  letter-spacing: 0.02em;
}

.section-lead {
  max-width: 38rem;
  color: var(--muted);
  margin-bottom: 3rem;
}

/* Business cards */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.card {
  border-top: 2px solid var(--ink);
  padding-top: 1.75rem;
}

.card-icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--ink);
  margin-bottom: 1.1rem;
}

.card h3 {
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
  margin-bottom: 0.6rem;
}

:lang(en) .card h3 {
  letter-spacing: 0.02em;
}

.card p {
  font-size: 0.93rem;
  color: var(--muted);
  line-height: 1.95;
}

@media (max-width: 52rem) {
  .cards {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }

  .section {
    padding: 4rem 0;
  }

  .hero {
    padding: 5.5rem 0;
  }
}

/* Philosophy band */

.band {
  background: linear-gradient(135deg, #0a1d3f 0%, #03112b 100%);
  color: #ffffff;
  padding: 5.5rem 0;
  text-align: center;
}

.band .kicker {
  color: rgba(255, 255, 255, 0.6);
}

.band .section-heading {
  color: #ffffff;
}

.band p {
  max-width: 38rem;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.82);
}

/* Contact */

.contact {
  text-align: center;
}

.contact .section-lead {
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2.25rem;
}

.button {
  display: inline-block;
  background: var(--ink);
  color: #ffffff;
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.85rem 2.4rem;
  border-radius: 6px;
  transition: background 0.15s ease;
}

.button:hover {
  background: var(--ink-deep);
  color: #ffffff;
  text-decoration: none;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--hairline);
  background: var(--wash);
  padding: 2.5rem 0 2rem;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--hairline);
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.footer-bottom {
  padding-top: 1.5rem;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* 404 */

.notfound {
  padding: 6rem 0;
  text-align: center;
}

.notfound h1 {
  font-size: 3rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ink);
}

.notfound p {
  margin: 1.25rem 0 2rem;
  color: var(--muted);
}