/* Kala — corporate landing */

:root {
  --bg: #0c0f14;
  --bg-elevated: #141922;
  --surface: #1a2230;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8ecf4;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.15);
  --accent-strong: #0ea5e9;
  --radius: 12px;
  --radius-lg: 20px;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-display: "Fraunces", Georgia, serif;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -30%, rgba(56, 189, 248, 0.12), transparent),
    radial-gradient(ellipse 80% 50% at 100% 50%, rgba(14, 165, 233, 0.06), transparent);
  min-height: 100vh;
}

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

.wrap {
  width: min(1120px, 100% - 3rem);
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(12, 15, 20, 0.85);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

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

.nav-cta {
  color: var(--accent) !important;
}

.nav-cta:hover {
  color: var(--accent-strong) !important;
}

/* Hero */

.hero {
  padding-block: clamp(4rem, 12vw, 7rem);
}

.hero-inner {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 2rem;
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 38ch;
}

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

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.35rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary:hover {
  background: var(--accent-strong);
}

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

.btn-ghost:hover {
  border-color: var(--text-muted);
  background: var(--bg-elevated);
}

.btn-large {
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
}

/* Sections */

.section {
  padding-block: clamp(3.5rem, 8vw, 5rem);
}

.section-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-intro {
  margin: 0 0 2.5rem;
  max-width: 62ch;
  color: var(--text-muted);
}

/* Approach — diagram */

.diagram-card {
  padding: clamp(1.5rem, 4vw, 2.25rem);
  margin-bottom: 2.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.flow-diagram {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0;
}

.flow-node {
  padding: 1rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  text-align: center;
  min-width: min(140px, 100%);
}

.flow-node-agents {
  border-color: rgba(56, 189, 248, 0.35);
  background: var(--accent-soft);
}

.flow-label {
  display: block;
  font-weight: 600;
  font-size: 0.9375rem;
}

.flow-sub {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.flow-connector {
  flex-shrink: 0;
  width: 2rem;
  height: 2px;
  background: linear-gradient(90deg, var(--border), var(--accent));
  border-radius: 1px;
}

@media (max-width: 540px) {
  .flow-diagram {
    flex-direction: column;
  }

  .flow-connector {
    width: 2px;
    height: 1.25rem;
    background: linear-gradient(180deg, var(--border), var(--accent));
  }
}

/* Bullet grid */

.bullet-grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .bullet-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.bullet-grid li {
  padding: 1.25rem 1.35rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.bullet-grid strong {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text);
  font-weight: 600;
}

/* Capability cards */

.capabilities {
  border-top: 1px solid var(--border);
}

.cards {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  padding: 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.0625rem;
  font-weight: 600;
}

.card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* CTA */

.cta-band {
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg) 100%);
}

.cta-inner {
  text-align: center;
  max-width: 560px;
}

.cta-inner h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
}

.cta-inner p {
  margin: 0 0 1.75rem;
  color: var(--text-muted);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 1.5rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-brand {
  font-weight: 600;
  color: var(--text);
}