/* build.sg — corporate landing (high-tech builder vibe) */

:root {
  --bg-deep: #050508;
  --bg-elevated: #0c0c12;
  --bg-card: rgba(18, 18, 28, 0.65);
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8e8ed;
  --text-muted: #8b8b9a;
  --accent: #4f9cff;
  --accent-dim: rgba(79, 156, 255, 0.14);
  --accent-glow: rgba(79, 156, 255, 0.38);
  /* Hero title shimmer: deep saturated blue ↔ near-white blue (high luminance contrast) */
  --title-highlight-a: #1d4ed8;
  --title-highlight-b: #eff6ff;
  --font-display: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 14px;
  --radius-sm: 8px;
  --max: 1120px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.grid-bg {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-dim), transparent 55%),
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 20%, transparent 70%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--border);
  background: rgba(5, 5, 8, 0.75);
  backdrop-filter: blur(14px);
}

.logo {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--text);
  text-decoration: none;
}

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

.nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

.nav a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.nav-cta {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text) !important;
}

.nav-cta:hover {
  border-color: rgba(79, 156, 255, 0.35);
  color: var(--accent) !important;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 0 auto;
  width: 18px;
  background: var(--text);
  transition: transform 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(5, 5, 8, 0.95);
  backdrop-filter: blur(12px);
}

.mobile-nav[hidden] {
  display: none !important;
}

.mobile-nav:not([hidden]) {
  display: flex;
}

.mobile-nav a {
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.mobile-nav a:hover {
  border-color: var(--border);
  background: var(--bg-elevated);
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }
}

main {
  position: relative;
  z-index: 1;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3rem, 10vw, 6rem) clamp(1.25rem, 4vw, 2.5rem) clamp(4rem, 12vw, 7rem);
}

.hero-kicker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.kicker-line {
  width: 32px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.hero-title {
  margin: 0 0 1.5rem;
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.title-highlight {
  display: inline;
  background: linear-gradient(
    120deg,
    var(--title-highlight-a) 0%,
    var(--title-highlight-b) 50%,
    var(--title-highlight-a) 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmer 5.5s ease-in-out infinite;
}

@keyframes shimmer {
  0%,
  100% {
    background-position: 0% center;
  }
  50% {
    background-position: 100% center;
  }
}

.hero-lede {
  max-width: 34em;
  margin: 0 0 2rem;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 1.125rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease;
  cursor: pointer;
}

.btn-primary {
  color: #041018;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent-glow);
}

.btn-primary:hover {
  box-shadow: 0 0 32px var(--accent-glow);
}

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

.btn-ghost:hover {
  border-color: rgba(79, 156, 255, 0.4);
  color: var(--accent);
}

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

.hero-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--border);
}

.hero-metrics div {
  display: grid;
  gap: 0.35rem;
}

.hero-metrics dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-metrics dd {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

@media (min-width: 640px) {
  .hero-metrics {
    grid-template-columns: repeat(3, 1fr);
  }
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 5rem) clamp(1.25rem, 4vw, 2.5rem);
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

.section-head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  font-weight: 500;
}

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

.cap-grid {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 768px) {
  .cap-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.cap-card {
  position: relative;
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  overflow: hidden;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.cap-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 0%), rgba(79, 156, 255, 0.08), transparent 40%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.cap-card:hover {
  border-color: rgba(79, 156, 255, 0.25);
  transform: translateY(-2px);
}

.cap-card:hover::before {
  opacity: 1;
}

.cap-icon {
  display: block;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.cap-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.cap-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.process-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elevated);
}

.process-steps li {
  display: grid;
  gap: 0.35rem;
  padding: 1.5rem 1.75rem;
  border-bottom: 1px solid var(--border);
}

.process-steps li:last-child {
  border-bottom: none;
}

.process-steps strong {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.process-steps span {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 500;
}

@media (min-width: 900px) {
  .process-steps {
    grid-template-columns: repeat(4, 1fr);
  }

  .process-steps li {
    border-bottom: none;
    border-right: 1px solid var(--border);
  }

  .process-steps li:last-child {
    border-right: none;
  }
}

.contact {
  border-top: 1px solid var(--border);
  padding-bottom: clamp(4rem, 12vw, 7rem);
}

.contact-panel {
  padding: clamp(2rem, 5vw, 3rem);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background:
    linear-gradient(135deg, rgba(79, 156, 255, 0.07) 0%, transparent 50%),
    var(--bg-card);
  text-align: center;
}

.contact-panel h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.contact-panel > p {
  max-width: 28rem;
  margin: 0 auto 1.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1.25rem, 4vw, 2.5rem) 2.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-brand {
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

  .title-highlight {
    animation: none;
    background: linear-gradient(120deg, var(--title-highlight-a), var(--title-highlight-b));
    background-size: 100%;
  }

  .cap-card {
    transition: none;
  }

  .cap-card:hover {
    transform: none;
  }
}