/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  position: relative;
}

img,
picture {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

/* ---------- Design tokens ---------- */
:root {
  --bg: #0d0d10;
  --bg-elevated: #17171b;
  --fg: #f2f1ed;
  --fg-muted: #a6a5a0;
  --border: #2a2a2f;
  --accent: #ff6a45;
  --accent-fg: #1a0a04;
  --accent-soft: #ff6a4522;
  --success: #4ad6a3;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;

  --content-width: 72rem;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;

  --radius: 0.9rem;
}

:root:lang(ja) {
  --font-sans: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic Medium",
    "Yu Gothic", "Noto Sans JP", -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #faf9f6;
    --bg-elevated: #ffffff;
    --fg: #17171b;
    --fg-muted: #5c5b57;
    --border: #e4e2dc;
    --accent: #e2530f;
    --accent-fg: #ffffff;
    --accent-soft: #e2530f18;
  }
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

@media (min-width: 48rem) {
  .wrap {
    padding-inline: var(--space-4);
  }
}

/* ---------- Accessibility helpers ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-fg);
  padding: var(--space-2) var(--space-3);
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-2);
}

.brand {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: var(--space-3);
}

.site-nav a {
  text-decoration: none;
  color: var(--fg-muted);
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

.site-nav a:hover {
  color: var(--fg);
}

.lang-switch {
  font-weight: 700;
  font-size: 0.8rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.lang-switch:hover {
  border-color: var(--accent);
}

/* ---------- Hero ---------- */
.hero {
  padding-block: var(--space-6) var(--space-5);
}

.hero-eyebrow {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin: 0 0 var(--space-2);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw + 1rem, 4rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
  max-width: 20ch;
}

.nowrap {
  white-space: nowrap;
}

.hero-lede {
  color: var(--fg-muted);
  font-size: clamp(1rem, 0.5vw + 0.9rem, 1.15rem);
  max-width: 42ch;
  margin: 0 0 var(--space-4);
}

.hero-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.site-network {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.site-network canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
}

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

.btn-ghost:hover {
  border-color: var(--accent);
}

/* ---------- Sections ---------- */
section {
  position: relative;
  padding-block: var(--space-5);
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 55%, transparent);
}

.section-title {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-size: clamp(1.4rem, 1vw + 1.2rem, 1.9rem);
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-4);
}

.section-index {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 56rem) {
  .about-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-5);
  }
}

.about-lead p {
  font-size: 1.1rem;
  color: var(--fg-muted);
  margin: 0 0 var(--space-3);
}

.about-lead p:last-child {
  margin-bottom: 0;
}

.about-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.about-points h3 {
  margin: 0 0 0.3rem;
  font-size: 1.02rem;
}

.about-points p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.95rem;
}

/* ---------- Services ---------- */
.service-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
}

.service-card {
  display: block;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.service-card:not(.service-card--placeholder):hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.service-card--placeholder {
  border-style: dashed;
}

.service-card--placeholder .service-name,
.service-card--placeholder .service-desc {
  color: var(--fg-muted);
}

.service-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.service-name {
  font-weight: 700;
  font-size: 1.1rem;
}

.service-status {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.service-status--live {
  color: var(--success);
  background: color-mix(in srgb, var(--success) 15%, transparent);
}

.service-status--soon {
  color: var(--fg-muted);
  background: color-mix(in srgb, var(--fg-muted) 15%, transparent);
}

.service-date {
  display: block;
  color: var(--fg-muted);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-2);
}

.service-desc {
  color: var(--fg-muted);
  font-size: 0.95rem;
  margin: 0 0 var(--space-2);
}

.service-link {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  padding-block: var(--space-3);
  color: var(--fg-muted);
  font-size: 0.85rem;
  background: color-mix(in srgb, var(--bg) 55%, transparent);
}

.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.footer-social {
  display: flex;
  gap: var(--space-2);
}

.footer-social a {
  display: inline-flex;
  color: var(--fg-muted);
  opacity: 0.75;
  transition: color 0.15s ease, opacity 0.15s ease;
}

.footer-social a:hover {
  color: var(--accent);
  opacity: 1;
}

/* ---------- Scroll-reveal (JS-enhanced, no-JS safe) ---------- */
[data-reveal] {
  opacity: 1;
  transform: none;
}

[data-reveal].is-ready {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}