:root {
  --bg: #f4f6f8;
  --bg-alt: #eef1f4;
  --hero-bg: #f8fafc;
  --footer-bg: #e8ecef;
  --surface: #ffffff;
  --text: #111111;
  --muted: #3f3f3f;
  --line: #d9d9d9;
  --primary: #eb8a4a;
  --primary-strong: #d97732;
  --accent: #eb8a4a;
  --radius: 14px;
  --shadow: 0 8px 22px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
}

.narrow {
  width: min(700px, calc(100% - 2.5rem));
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
  z-index: 30;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand img {
  display: block;
  height: 30px;
  width: auto;
}

.nav-list {
  display: flex;
  gap: 1.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}

.nav-list a {
  position: relative;
  padding-bottom: 2px;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.18s ease;
}

.nav-list a:hover::after,
.nav-list a:focus-visible::after {
  transform: scaleX(1);
}

.nav-list a.active,
.nav-list a[aria-current="page"] {
  color: var(--accent);
}

.nav-list a.active::after,
.nav-list a[aria-current="page"]::after {
  transform: scaleX(1);
  height: 3px;
}

main {
  overflow: hidden;
}

.section {
  padding: 5rem 0;
}

.alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(238, 241, 244, 0.92));
}

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #2d2d2d;
  display: inline-block;
  padding-bottom: 0.22rem;
  border-bottom: 1px solid rgba(235, 138, 74, 0.55);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2rem, 4vw, 4rem);
  max-width: 15ch;
  line-height: 1.04;
  letter-spacing: -0.018em;
}

h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.5rem);
  margin-bottom: 0.85rem;
}

h2::after {
  content: ".";
  color: var(--accent);
}

h3 {
  font-size: 1.2rem;
}

.hero {
  padding: 5.5rem 0 4.5rem;
  background:
    radial-gradient(120% 85% at 82% 12%, rgba(235, 138, 74, 0.1), transparent 64%),
    radial-gradient(95% 70% at 16% 88%, rgba(255, 255, 255, 0.65), transparent 60%),
    repeating-linear-gradient(0deg, rgba(17, 17, 17, 0.012) 0 1px, transparent 1px 3px),
    var(--hero-bg);
}

.hero-grid {
  display: grid;
  gap: 3.4rem;
  grid-template-columns: 1fr 0.84fr;
  align-items: center;
}

.hero-copy,
.section-copy {
  margin: 1rem 0 0;
  color: var(--muted);
  max-width: 68ch;
}

.hero-copy {
  margin-top: 0.72rem;
}

.hero-actions {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.1rem;
  border-radius: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

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

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-strong);
  box-shadow: 0 6px 16px rgba(217, 119, 50, 0.28);
}

.btn-ghost {
  border-color: var(--text);
  color: var(--text);
  background: transparent;
}

.btn-ghost:hover {
  background: #eceef0;
}

.hero-visual {
  position: relative;
  min-height: 324px;
  border: 0;
  width: 100%;
  justify-self: end;
  margin-right: 0.8rem;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
  transform: translateY(-14px);
}

.hero-visual-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  filter: drop-shadow(0 10px 22px rgba(17, 17, 17, 0.14)) drop-shadow(0 2px 6px rgba(17, 17, 17, 0.08));
}

.flow-node {
  position: absolute;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid rgba(17, 17, 17, 0.3);
  background: #fff;
}

.n1 { top: 32px; left: 14%; }
.n2 { top: 55%; left: 32%; }
.n3 { top: 22%; right: 30%; }
.n4 { bottom: 35px; right: 12%; }

.flow-path {
  position: absolute;
  border-top: 2px dashed rgba(17, 17, 17, 0.28);
}

.p1 { top: 64px; left: 27%; width: 32%; transform: rotate(14deg); }
.p2 { top: 56%; left: 41%; width: 30%; transform: rotate(-22deg); }
.p3 { top: 42%; left: 17%; width: 22%; transform: rotate(48deg); }

.card-grid {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
}

.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.card p {
  color: var(--muted);
  margin: 0.7rem 0 0.9rem;
}

.card-tag {
  margin: 0 0 0.45rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #a6a6a6;
}

.card-link {
  font-weight: 600;
  color: var(--primary);
}

.card-link:hover {
  color: var(--accent);
}

.timeline {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.timeline li {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 1rem;
  position: relative;
}

.timeline li::before {
  content: "";
  position: absolute;
  top: -14px;
  left: 1rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline p {
  margin: 0.6rem 0 0;
  color: var(--muted);
}

.stack-list {
  margin: 1.4rem 0 0;
  list-style: none;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.72), rgba(238, 241, 244, 0.6));
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 16px;
  padding: 1rem;
}

.stack-list li {
  background: #fff;
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 12px;
  padding: 1rem 1.05rem;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

.join-form {
  margin-top: 1.25rem;
  display: flex;
  gap: 0.7rem;
}

.join-form input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.78rem 0.9rem;
  font: inherit;
}

.trust-line {
  margin: 0.9rem 0 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: #505860;
}

.langit-hero {
  padding-top: 5rem;
}

.langit-hero-grid {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: stretch;
}

.demo-shell {
  border: 1px solid rgba(17, 17, 17, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 12px 28px rgba(17, 17, 17, 0.08);
  padding: 1.2rem;
}

.demo-shell ul {
  margin: 0.8rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.demo-label {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #5c6570;
}

.demo-copy {
  margin: 0.7rem 0 0;
  color: var(--muted);
}

.demo-grid,
.feature-grid,
.faq-list,
.language-grid {
  margin-top: 1.5rem;
}

.demo-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-card {
  background: #fff;
  border: 1px solid rgba(17, 17, 17, 0.09);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 7px 18px rgba(0, 0, 0, 0.045);
}

.feature-card p {
  margin: 0;
  color: #2e3135;
  font-weight: 500;
}

.language-grid {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.62rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.language-grid li {
  padding: 0.62rem 0.8rem;
  border-radius: 10px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  background: #fff;
  font-size: 0.93rem;
}

.status-box {
  border-radius: 14px;
  border: 1px solid rgba(17, 17, 17, 0.12);
  background: #fff;
  box-shadow: var(--shadow);
  padding: 1rem;
}

.status-box p {
  margin: 0;
}

.status-box p + p {
  margin-top: 0.45rem;
}

.privacy-summary {
  margin-top: 1rem;
  display: grid;
  gap: 0.55rem;
}

.privacy-summary p {
  margin: 0;
}

.faq-list {
  display: grid;
  gap: 0.85rem;
}

.faq-item {
  border: 1px solid rgba(17, 17, 17, 0.09);
  border-radius: 12px;
  background: #fff;
  padding: 0.95rem 1rem;
}

.faq-item p {
  margin: 0.55rem 0 0;
  color: var(--muted);
}

.contact-form {
  margin-top: 1rem;
  display: grid;
  gap: 0.7rem;
}

.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem 0.9rem;
  font: inherit;
  resize: vertical;
}

.policy-content h1 {
  margin-top: 0.55rem;
}

.policy-content h2 {
  margin-top: 1.8rem;
}

.policy-content p,
.policy-content ul {
  color: var(--muted);
}

.policy-content ul {
  margin: 0.55rem 0 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.6rem 0 1.5rem;
  background:
    linear-gradient(180deg, rgba(232, 236, 239, 0.96), rgba(223, 228, 232, 0.98)),
    var(--footer-bg);
}

.footer-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.4fr 1fr 1fr;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.footer-tag,
.copyright {
  color: var(--muted);
  margin: 0.35rem 0 0;
}

.copyright {
  text-align: center;
  margin-top: 1.2rem;
}

@media (max-width: 980px) {
  .hero-grid,
  .langit-hero-grid,
  .three,
  .four,
  .two,
  .timeline,
  .demo-grid,
  .feature-grid,
  .language-grid,
  .stack-list,
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-visual {
    min-height: 280px;
    width: 100%;
    margin-right: 0;
    transform: translateY(0);
  }
}

@media (max-width: 700px) {
  .nav-list {
    display: none;
  }

  .section,
  .hero {
    padding: 3.5rem 0;
  }

  .hero-grid,
  .langit-hero-grid,
  .three,
  .four,
  .two,
  .timeline,
  .demo-grid,
  .feature-grid,
  .language-grid,
  .stack-list,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .join-form {
    flex-direction: column;
  }
}