:root {
  --bg: #081819;
  --heading: #e5f9fa;
  --body: #a7d0d4;
  --muted: #78a9af;
  --accent: #37c8dd;
  --accent-text: #062a2e;
  --card-bg: #0e2528;
  --border: #163538;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--body);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

a {
  color: inherit;
}

.icon {
  width: 22px;
  height: 22px;
  display: inline-block;
  stroke: currentColor;
}

.icon path,
.icon line,
.icon rect {
  stroke: currentColor;
}

/* ── Nav ────────────────────────────────────────────────── */

nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.75rem;
  background: rgba(8, 24, 25, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--heading);
}

.brand .icon {
  width: 24px;
  height: 24px;
}

.brand-name {
  font-family: "Shippori Mincho", serif;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--body);
}

.nav-links a:hover {
  color: var(--heading);
}

.nav-links .btn {
  color: var(--accent-text);
}

/* ── Buttons ────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--accent-text);
  border: none;
  border-radius: 12px;
  padding: 0.75rem 1.4rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover {
  filter: brightness(1.08);
}

.btn-ghost {
  background: transparent;
  color: var(--heading);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--accent);
  filter: none;
}

/* ── Hero ───────────────────────────────────────────────── */

.hero {
  max-width: 760px;
  margin: 0 auto;
  padding: 6rem 1.5rem 4rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.3rem, 5vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--heading);
  margin: 0 0 1.25rem;
}

.hero .lede {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--body);
  margin: 0 auto 2.25rem;
  max-width: 620px;
}

.hero .cta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

/* ── Section heading (shared) ───────────────────────────── */

.section-heading {
  text-align: center;
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--heading);
  margin: 0 0 2.5rem;
}

/* ── Why Tsunagi (pillars) ──────────────────────────────── */

.pillars {
  max-width: 1040px;
  margin: 0 auto;
  padding: 2rem 1.5rem 1rem;
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
}

.pillar-card .icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--accent);
  margin-bottom: 1rem;
}

.pillar-card h3 {
  color: var(--heading);
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
}

.pillar-card p {
  color: var(--body);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 0;
}

/* ── Features ───────────────────────────────────────────── */

.features {
  max-width: 1040px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

@media (max-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
}

.feature-card .icon {
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.feature-card h3 {
  color: var(--heading);
  font-size: 1rem;
  margin: 0 0 0.4rem;
}

.feature-card p {
  color: var(--body);
  font-size: 0.88rem;
  line-height: 1.5;
  margin: 0;
}

/* ── Download section ──────────────────────────────────── */

.download-section {
  text-align: center;
  padding: 4rem 1.5rem 5rem;
  border-top: 1px solid var(--border);
}

.download-section h2 {
  color: var(--heading);
  font-size: 1.7rem;
  margin: 0 0 0.6rem;
}

.download-section p {
  color: var(--body);
  margin: 0 0 1.75rem;
}

/* ── Footer ─────────────────────────────────────────────── */

footer {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

footer a {
  text-decoration: none;
}

footer a:hover {
  color: var(--heading);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

@media (max-width: 640px) {
  .nav-links {
    gap: 1rem;
  }
}

/* ── Legal pages ────────────────────────────────────────── */

.legal-content {
  max-width: 680px;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}

.legal-content .back-link {
  display: inline-block;
  margin-bottom: 2rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.legal-content .back-link:hover {
  color: var(--heading);
}

.legal-content h1 {
  font-size: 2rem;
  color: var(--heading);
  margin: 0 0 0.5rem;
}

.legal-content .updated {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 2.5rem;
}

.legal-content .body-copy {
  line-height: 1.7;
  color: var(--body);
}

.legal-content .body-copy h2 {
  color: var(--heading);
  font-size: 1.25rem;
  margin: 0 0 0.75rem;
}

.legal-content .body-copy h3 {
  color: var(--heading);
  font-size: 1.05rem;
  margin: 1.5rem 0 0.5rem;
}

.legal-content .body-copy p {
  margin: 0 0 1rem;
}

.legal-content .body-copy ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.legal-content .body-copy li {
  margin-bottom: 0.5rem;
}

.legal-content .body-copy a {
  color: var(--accent);
}

.legal-content .body-copy hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

.legal-content .body-copy table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
}

.legal-content .body-copy th,
.legal-content .body-copy td {
  border: 1px solid var(--border);
  padding: 0.6rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.legal-content .body-copy th {
  color: var(--heading);
  background: var(--card-bg);
}

.legal-content .body-copy .see-also {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--muted);
}