:root {
  color-scheme: dark;
  --bg: #07100f;
  --surface: #0e1b1a;
  --surface-strong: #132725;
  --text: #f4fbf7;
  --muted: #a9bbb5;
  --line: rgba(244, 251, 247, 0.14);
  --mint: #72e2b8;
  --blue: #7bb7ff;
  --gold: #ffc85a;
  --danger: #ff8d73;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 14px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
  background: rgba(7, 16, 15, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid rgba(114, 226, 184, 0.48);
  border-radius: 8px;
  background: #102522;
  color: var(--mint);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  color: var(--muted);
  font-size: 0.94rem;
}

.nav-links a,
.footer-links a {
  text-decoration: none;
}

.nav-links a:hover,
.footer-links a:hover {
  color: var(--mint);
}

.language-picker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.language-picker select {
  min-width: 150px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #0b1716;
  color: var(--text);
  padding: 9px 12px;
}

.hero {
  min-height: 82vh;
  display: flex;
  align-items: flex-end;
  padding: clamp(84px, 12vh, 140px) clamp(18px, 6vw, 88px) clamp(34px, 7vh, 72px);
  background:
    linear-gradient(90deg, rgba(7, 16, 15, 0.95), rgba(7, 16, 15, 0.74) 42%, rgba(7, 16, 15, 0.18)),
    linear-gradient(0deg, rgba(7, 16, 15, 0.98), rgba(7, 16, 15, 0.12) 28%),
    url("./assets/koracall-hero.png") center right / cover no-repeat;
}

.hero-content {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--mint);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(4.2rem, 10vw, 9rem);
  line-height: 0.9;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 660px;
  margin: 22px 0 0;
  color: #dce8e3;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.hero-actions,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  background: var(--mint);
  color: #04110e;
}

.button.secondary {
  border: 1px solid rgba(244, 251, 247, 0.28);
  background: rgba(244, 251, 247, 0.06);
}

.button.disabled {
  pointer-events: none;
  opacity: 0.7;
}

.status-strip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: 100%;
  margin-top: 20px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 200, 90, 0.34);
  border-radius: 8px;
  background: rgba(255, 200, 90, 0.1);
  color: #ffe7aa;
}

.status-dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--gold);
}

.section {
  padding: clamp(58px, 8vw, 108px) clamp(18px, 6vw, 88px);
}

.band {
  background: #0a1717;
  border-block: 1px solid var(--line);
}

.section-heading {
  max-width: 840px;
  margin-bottom: 28px;
}

.section-heading p,
.two-column p,
.download-section p,
.site-footer p {
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature-card,
.meter,
.principles > div,
details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.feature-card {
  padding: 20px;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.feature-icon {
  display: inline-grid;
  min-width: 42px;
  height: 34px;
  place-items: center;
  margin-bottom: 22px;
  border-radius: 8px;
  background: #122824;
  color: var(--mint);
  font-size: 0.86rem;
  font-weight: 900;
}

.two-column,
.download-section {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: 32px;
  align-items: center;
}

.meter {
  padding: 22px;
  background: var(--surface-strong);
}

.meter span {
  color: var(--muted);
}

.meter strong {
  display: block;
  margin-top: 8px;
  color: var(--danger);
  font-size: clamp(1.3rem, 3vw, 2rem);
  overflow-wrap: anywhere;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.principles > div {
  padding: 22px;
}

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

.faq-list {
  display: grid;
  gap: 10px;
  max-width: 980px;
}

details {
  padding: 18px 20px;
}

summary {
  cursor: pointer;
  font-weight: 800;
}

details p {
  margin-bottom: 0;
  color: var(--muted);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 32px clamp(18px, 6vw, 88px);
  border-top: 1px solid var(--line);
  background: #060d0c;
}

.footer-links {
  color: var(--muted);
}

[dir="rtl"] .hero {
  background:
    linear-gradient(270deg, rgba(7, 16, 15, 0.95), rgba(7, 16, 15, 0.74) 42%, rgba(7, 16, 15, 0.18)),
    linear-gradient(0deg, rgba(7, 16, 15, 0.98), rgba(7, 16, 15, 0.12) 28%),
    url("./assets/koracall-hero.png") center left / cover no-repeat;
}

@media (max-width: 980px) {
  .site-header,
  .site-footer,
  .two-column,
  .download-section {
    grid-template-columns: 1fr;
  }

  .nav-links {
    justify-content: flex-start;
  }

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

@media (max-width: 640px) {
  .site-header {
    gap: 14px;
  }

  .nav-links {
    display: none;
  }

  .language-picker {
    align-items: flex-start;
    flex-direction: column;
  }

  .language-picker select {
    width: 100%;
  }

  .hero {
    min-height: 78vh;
    align-items: flex-end;
  }

  h1 {
    font-size: 4rem;
  }

  .hero-actions,
  .button,
  .feature-grid,
  .principles {
    width: 100%;
  }

  .button {
    min-width: 0;
  }

  .feature-grid,
  .principles {
    grid-template-columns: 1fr;
  }
}