:root {
  --bg: #071014;
  --bg-soft: #0f1d24;
  --card: rgba(255,255,255,0.07);
  --card-border: rgba(255,255,255,0.13);
  --text: #f5f7f8;
  --muted: #a9b7bd;
  --accent: #f97316;
  --accent-2: #38bdf8;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #14313c 0, #071014 42%, #04080a 100%);
  color: var(--text);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 22px;
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #071014;
  font-weight: 900;
}

.nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 0.94rem;
}

.nav a:hover, .nav a.active { color: var(--text); }

.language-switcher {
  display: flex;
  gap: 6px;
  padding: 5px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--card-border);
  border-radius: 999px;
}

.language-switcher button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 7px 10px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
}

.language-switcher button.active {
  background: var(--text);
  color: #071014;
}

.hero, .page-hero {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  padding: 78px 22px 98px;
}

.hero {
  min-height: 84vh;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.hero-bg {
  position: absolute;
  inset: 25px 22px;
  border-radius: 34px;
  background:
    linear-gradient(120deg, rgba(7,16,20,0.35), rgba(7,16,20,0.9)),
    url("https://images.unsplash.com/photo-1599508704512-2f19efd1e35f?auto=format&fit=crop&w=1600&q=80");
  background-size: cover;
  background-position: center;
  opacity: 0.62;
  z-index: -1;
  border: 1px solid rgba(255,255,255,0.12);
}

.hero-content { max-width: 780px; }

.eyebrow, .section-kicker {
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.76rem;
  font-weight: 800;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  font-size: clamp(3rem, 7vw, 6.8rem);
  line-height: 0.9;
  letter-spacing: -0.07em;
  margin-bottom: 26px;
}

.page-hero h1 {
  max-width: 920px;
  font-size: clamp(2.8rem, 6vw, 6rem);
}

.hero-subtitle, .page-subtitle {
  max-width: 760px;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: #d7e0e4;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.btn, .newsletter button, .prompt-row button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn.primary, .newsletter button, .prompt-row button {
  background: var(--accent);
  color: #160a03;
}

.btn.secondary {
  border-color: rgba(255,255,255,0.28);
  background: rgba(255,255,255,0.08);
}

.hero-panel {
  align-self: end;
  padding: 26px;
  border-radius: 26px;
  border: 1px solid var(--card-border);
  background: rgba(7,16,20,0.76);
  box-shadow: 0 25px 80px rgba(0,0,0,0.35);
}

.hero-panel span {
  color: var(--accent);
  font-weight: 800;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: .12em;
}

.hero-panel strong {
  display: block;
  font-size: 1.55rem;
  line-height: 1.08;
  margin: 14px 0;
}

.hero-panel p { color: var(--muted); margin-bottom: 0; }

.section, .content-section, .newsletter, .feature-grid, .detail-grid, .cards-wide {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 22px;
}

.intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: end;
}

.intro h2, .ask-copy h2, .content-section h2, .newsletter h2, .section h2 {
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.intro p:last-child, .ask-copy p, .newsletter p, .section p {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.feature-grid, .detail-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

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

.feature-card, .article-grid article, .chat-demo, .newsletter, .detail-card, .wide-card {
  border: 1px solid var(--card-border);
  background: var(--card);
  border-radius: 26px;
  backdrop-filter: blur(18px);
}

.feature-card, .detail-card, .wide-card {
  min-height: 250px;
  padding: 24px;
}

.feature-card.highlight, .detail-card.highlight, .wide-card.highlight {
  background: linear-gradient(135deg, rgba(249,115,22,0.27), rgba(56,189,248,0.12));
}

.feature-card span, .detail-card span {
  color: var(--accent);
  font-weight: 900;
}

.feature-card h3, .detail-card h3 {
  margin-top: 44px;
  font-size: 1.45rem;
}

.feature-card p, .article-grid p, .detail-card p, .wide-card p {
  color: var(--muted);
  line-height: 1.6;
}

.ask-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: center;
}

.chat-demo {
  padding: 20px;
  box-shadow: 0 25px 80px rgba(0,0,0,0.28);
}

.chat-top {
  display: flex;
  gap: 7px;
  margin-bottom: 18px;
}

.chat-top span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.35);
}

.chat-message {
  max-width: 86%;
  padding: 14px 16px;
  border-radius: 18px;
  margin: 12px 0;
  line-height: 1.5;
}

.chat-message.user {
  margin-left: auto;
  background: rgba(56,189,248,0.2);
}

.chat-message.bot {
  background: rgba(255,255,255,0.1);
  color: #dce6ea;
}

.prompt-row, .newsletter form {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

input {
  width: 100%;
  min-height: 48px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  background: rgba(0,0,0,0.25);
  color: var(--text);
  outline: none;
}

.content-section .section-heading {
  max-width: 800px;
  margin-bottom: 30px;
}

.article-grid {
  display: grid;
  gap: 18px;
}

.article-grid article {
  padding: 24px;
}

.cards-wide {
  display: grid;
  gap: 18px;
}

.wide-card {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 24px;
  align-items: start;
}

.wide-card strong {
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .75rem;
}

.newsletter {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 70px;
}

.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 30px 22px 50px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid rgba(255,255,255,0.09);
}

@media (max-width: 980px) {
  .nav { display: none; }
  .hero, .intro, .ask-section, .newsletter, .wide-card {
    grid-template-columns: 1fr;
  }
  .feature-grid, .detail-grid, .detail-grid.three, .article-grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero {
    min-height: auto;
    padding-top: 60px;
  }
}

@media (max-width: 640px) {
  .site-header {
    flex-wrap: wrap;
    gap: 12px;
  }
  .feature-grid, .detail-grid, .detail-grid.three, .article-grid {
    grid-template-columns: 1fr;
  }
  .hero-bg { inset: 12px; }
  .footer { flex-direction: column; }
  .prompt-row, .newsletter form { flex-direction: column; }
}