/* TauLeap — shared styles for the product hub and legal pages */

:root {
  --ink: #101c26;
  --ink-2: #34485a;
  --ink-3: #6d8391;
  --line: rgba(16, 28, 38, 0.14);
  --line-soft: rgba(16, 28, 38, 0.07);
  --paper: #f3f7f8;
  --card: #ffffff;
  --accent: #0d7a6a;
  --accent-deep: #063f38;
  --accent-soft: rgba(13, 122, 106, 0.09);

  --display: "Space Grotesk", "IBM Plex Sans JP", sans-serif;
  --body: "IBM Plex Sans JP", "Space Grotesk", sans-serif;

  --shell: 1120px;
  --measure: 70ch;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.75;
  font-feature-settings: "palt" 1;
  background-color: var(--paper);
  background-image:
    radial-gradient(120% 78% at 100% -10%, #dfeef0 0%, rgba(223, 238, 240, 0) 62%),
    radial-gradient(95% 65% at -5% 4%, #e9f2e9 0%, rgba(233, 242, 233, 0) 58%),
    linear-gradient(180deg, #f6f9fa 0%, #edf3f4 100%);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  background-image: radial-gradient(circle at 1px 1px, rgba(16, 28, 38, 0.09) 1px, transparent 0);
  background-size: 22px 22px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 70%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 70%);
}

a {
  color: var(--accent-deep);
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--accent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.shell {
  width: min(100% - 2.5rem, var(--shell));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

/* ---------- Masthead ---------- */

.masthead {
  position: relative;
  z-index: 2;
  padding: 1.6rem 0 0;
}

.masthead .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.mark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.mark .glyph {
  font-size: 1.35em;
  line-height: 1;
  color: var(--accent);
}

.masthead nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}

.masthead nav a {
  color: var(--ink-2);
  text-decoration: none;
}

.masthead nav a:hover {
  color: var(--accent);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: min(52vh, 420px);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 2.75rem 0 3.25rem;
}

.hero-plane {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  overflow: hidden;
}

.hero-plane span {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(26rem, 62vw, 58rem);
  line-height: 0.72;
  color: var(--accent);
  opacity: 0.13;
  transform: translate(14%, 4%);
  will-change: transform;
}

.hero .shell {
  position: relative;
  z-index: 1;
}

.wordmark {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(3.6rem, 13vw, 9.5rem);
  line-height: 0.92;
  letter-spacing: -0.045em;
  margin: 0;
  color: var(--ink);
}

.wordmark em {
  font-style: normal;
  color: var(--accent);
}

.hero-lede {
  max-width: 34ch;
  margin: 1.6rem 0 0;
  font-size: clamp(1.1rem, 2.1vw, 1.4rem);
  line-height: 1.6;
  color: var(--ink-2);
}

.hero-lede-ja {
  max-width: 40ch;
  margin: 0.5rem 0 0;
  font-size: 1rem;
  color: var(--ink-3);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2.4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.72rem 1.5rem;
  border-radius: 4px;
  font-family: var(--display);
  font-weight: 500;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: transform 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.btn-primary {
  background: var(--accent-deep);
  color: #f4fbf9;
  border: 1px solid var(--accent-deep);
}

.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--ink-2);
  background: rgba(255, 255, 255, 0.62);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(255, 255, 255, 0.85);
  transform: translateY(-2px);
}

/* ---------- Sections ---------- */

.band {
  position: relative;
  z-index: 1;
  padding: 5rem 0;
  border-top: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.5);
}

#products {
  padding: 2rem 0 2.5rem;
}

.band-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.band-head h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.75rem, 3.6vw, 2.5rem);
  letter-spacing: -0.03em;
  margin: 0;
}

.band-head p {
  margin: 0;
  color: var(--ink-3);
  font-size: 0.98rem;
}

/* ---------- Product rows ---------- */

.products {
  display: grid;
  gap: 0;
}

.product {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr) auto;
  gap: 1rem 2.5rem;
  align-items: start;
  padding: 2.2rem 0;
  border-top: 1px solid var(--line-soft);
}

.product:last-child {
  border-bottom: none;
}

.product h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  margin: 0;
}

.product .platform {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.4rem;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.product .soon {
  padding: 0.1rem 0.5rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: var(--accent-soft);
}

.product p {
  margin: 0;
  color: var(--ink-2);
  max-width: 48ch;
}

.product p + p {
  margin-top: 0.35rem;
  color: var(--ink-3);
  font-size: 0.95rem;
}

.doc-links {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-items: flex-start;
}

.doc-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.94rem;
  color: var(--ink-2);
  text-decoration: none;
  white-space: nowrap;
}

.doc-links a::after {
  content: "→";
  color: var(--accent);
  transform: translateX(-3px);
  opacity: 0.55;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.doc-links a:hover {
  color: var(--accent-deep);
}

.doc-links a:hover::after {
  transform: translateX(1px);
  opacity: 1;
}

/* ---------- Purpose ---------- */

.purpose {
  padding: 1.5rem 0;
}

.purpose .shell {
  max-width: 46rem;
}

.purpose h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  letter-spacing: -0.03em;
  margin: 0;
}

.purpose-kicker {
  margin: 0.2rem 0 1.1rem;
  color: var(--ink-3);
  font-size: 0.98rem;
}

.purpose p {
  margin: 0 0 0.5rem;
  color: var(--ink-2);
}

.purpose .purpose-ja {
  margin: 0;
  color: var(--ink-3);
}

/* ---------- Contact ---------- */

.contact {
  padding: 2rem 0 2.5rem;
}

.contact .shell {
  max-width: 46rem;
}

.contact h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.9rem;
}

.contact p {
  margin: 0 0 0.4rem;
  color: var(--ink-2);
}

.mail {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--display);
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  letter-spacing: -0.02em;
  color: var(--accent-deep);
}

/* ---------- Footer ---------- */

.site-foot {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line-soft);
  padding: 2rem 0 3rem;
  font-size: 0.9rem;
  color: var(--ink-3);
}

.site-foot .shell {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

/* ---------- Legal documents ---------- */

.legal-head {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--line-soft);
}

.legal-head .shell {
  max-width: var(--measure);
}

.eyebrow {
  font-family: var(--display);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.6rem;
}

.legal-head h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.1rem, 5.5vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
  margin: 0;
}

.legal-head .subtitle {
  margin: 0.5rem 0 0;
  font-size: 1.1rem;
  color: var(--ink-3);
}

.docmeta {
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.3rem;
  font-size: 0.92rem;
  color: var(--ink-2);
}

.docmeta strong {
  font-weight: 500;
  color: var(--ink-3);
  display: inline-block;
  min-width: 9.5rem;
}

.legal {
  padding: 3rem 0 4rem;
}

.legal .shell {
  max-width: var(--measure);
}

.lang-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 3.5rem 0 2rem;
  font-family: var(--display);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.lang-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.legal h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  margin: 2.4rem 0 0.7rem;
}

.legal h3 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.05rem;
  margin: 1.6rem 0 0.4rem;
  color: var(--ink-2);
}

.legal p {
  margin: 0 0 1rem;
}

.legal ul {
  margin: 0 0 1.2rem;
  padding-left: 1.2rem;
}

.legal li {
  margin-bottom: 0.45rem;
}

.legal code {
  font-family: "SFMono-Regular", "JetBrains Mono", "Menlo", monospace;
  font-size: 0.88em;
  background: var(--accent-soft);
  padding: 0.12em 0.4em;
  border-radius: 3px;
  overflow-wrap: anywhere;
}

.legal .note {
  margin: 2rem 0 0;
  padding: 1.1rem 1.3rem;
  border-left: 2px solid var(--accent);
  background: var(--accent-soft);
  font-size: 0.95rem;
  color: var(--ink-2);
}

.doc-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.94rem;
}

/* ---------- Motion ---------- */

.rise {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.rise.is-in {
  opacity: 1;
  transform: none;
}

.hero .rise {
  transition-delay: calc(var(--i, 0) * 110ms);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .rise {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:hover,
  .doc-links a:hover::after {
    transform: none;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .product {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.85rem;
  }

  .doc-links {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1.2rem;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 16px;
  }

  .masthead nav {
    gap: 1rem;
    font-size: 0.86rem;
  }

  .hero {
    min-height: auto;
    padding: 2.25rem 0 2.75rem;
  }

  .hero-plane span {
    transform: translate(22%, 6%);
    opacity: 0.1;
  }

  .band {
    padding: 3.5rem 0;
  }

  .purpose {
    padding: 1.35rem 0;
  }

  .contact {
    padding: 1.75rem 0 2.25rem;
  }

  #products {
    padding: 1.75rem 0 2.25rem;
  }

  .docmeta strong {
    min-width: 0;
    display: block;
  }
}