/* ============================================
   LYTBITS PTE. LTD. — Design System
   ============================================ */

:root {
  --color-navy-900: #0b1c2c;
  --color-navy-800: #10283f;
  --color-navy-700: #163752;
  --color-navy-600: #1f4a6b;
  --color-gold-500: #b8925a;
  --color-gold-400: #c9a876;
  --color-gold-100: #f4ead9;
  --color-ink: #1a2027;
  --color-slate-700: #3d4a58;
  --color-slate-500: #64748b;
  --color-slate-300: #cbd5e1;
  --color-slate-100: #eef1f4;
  --color-white: #ffffff;
  --color-bg: #fbfaf8;

  --font-serif: "Georgia", "Iowan Old Style", "Palatino Linotype", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --max-width: 1180px;
  --radius: 6px;
  --shadow-sm: 0 1px 3px rgba(11, 28, 44, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 28, 44, 0.10);
  --transition: 200ms ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

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

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.25;
  color: var(--color-navy-900);
}

h1 { font-size: clamp(2.25rem, 4vw, 3.25rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.35rem); }
h3 { font-size: 1.3rem; }

p { color: var(--color-slate-700); }

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold-500);
  margin-bottom: 12px;
}

.section {
  padding: 88px 0;
}

.section--tight {
  padding: 56px 0;
}

.section--alt {
  background: var(--color-white);
  border-top: 1px solid var(--color-slate-100);
  border-bottom: 1px solid var(--color-slate-100);
}

.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.btn-primary {
  background: var(--color-navy-900);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-navy-700);
}

.btn-outline {
  background: transparent;
  border-color: var(--color-navy-900);
  color: var(--color-navy-900);
}

.btn-outline:hover {
  background: var(--color-navy-900);
  color: var(--color-white);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--color-white);
}

.btn-outline-light:hover {
  background: var(--color-white);
  color: var(--color-navy-900);
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 250, 248, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-slate-100);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--color-navy-900);
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--color-navy-900), var(--color-navy-600));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gold-400);
  font-family: var(--font-serif);
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--color-slate-700);
  transition: color var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-navy-900);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  background: var(--color-gold-500);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-navy-900);
}

/* ---------- Hero ---------- */

.hero {
  background: linear-gradient(160deg, var(--color-navy-900) 0%, var(--color-navy-700) 100%);
  color: var(--color-white);
  padding: 120px 0 100px;
}

.hero h1,
.hero p {
  color: var(--color-white);
}

.hero-content {
  max-width: 680px;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--color-slate-300);
  margin: 22px 0 36px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-stats .stat-value {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--color-gold-400);
}

.hero-stats .stat-label {
  font-size: 0.85rem;
  color: var(--color-slate-300);
  margin-top: 4px;
}

/* ---------- Page header (interior pages) ---------- */

.page-header {
  background: var(--color-navy-900);
  color: var(--color-white);
  padding: 72px 0 56px;
}

.page-header h1,
.page-header p {
  color: var(--color-white);
}

.page-header p {
  color: var(--color-slate-300);
  max-width: 620px;
  margin-top: 14px;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-slate-300);
}

.breadcrumb a {
  color: var(--color-gold-400);
}

/* ---------- Cards / Grids ---------- */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  align-items: center;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-slate-100);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.card .card-index {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--color-gold-500);
  margin-bottom: 18px;
}

.card h3 {
  margin-bottom: 12px;
}

.card p {
  font-size: 0.95rem;
}

.card a.card-link {
  display: inline-block;
  margin-top: 18px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-navy-900);
  border-bottom: 1px solid var(--color-gold-500);
  padding-bottom: 2px;
}

/* ---------- Service detail blocks ---------- */

.service-block {
  padding: 56px 0;
  border-bottom: 1px solid var(--color-slate-100);
}

.service-block:last-child {
  border-bottom: none;
}

.service-block-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 20px;
}

.service-number {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-gold-500);
}

.sub-services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.sub-service {
  border-left: 2px solid var(--color-gold-500);
  padding-left: 18px;
}

.sub-service h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-navy-900);
  margin-bottom: 6px;
}

.sub-service p {
  font-size: 0.92rem;
}

/* ---------- About page ---------- */

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.info-table tr {
  border-bottom: 1px solid var(--color-slate-100);
}

.info-table td {
  padding: 14px 0;
  font-size: 0.95rem;
}

.info-table td:first-child {
  color: var(--color-slate-500);
  width: 40%;
}

.info-table td:last-child {
  color: var(--color-ink);
  font-weight: 500;
}

.value-list {
  display: grid;
  gap: 24px;
  margin-top: 12px;
}

.value-item {
  display: flex;
  gap: 18px;
}

.value-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--color-gold-100);
  color: var(--color-gold-500);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
}

/* ---------- CTA band ---------- */

.cta-band {
  background: var(--color-navy-900);
  color: var(--color-white);
  padding: 64px 0;
  text-align: center;
}

.cta-band h2,
.cta-band p {
  color: var(--color-white);
}

.cta-band p {
  color: var(--color-slate-300);
  margin: 14px auto 30px;
  max-width: 520px;
}

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
}

.contact-info-item {
  margin-bottom: 28px;
}

.contact-info-item .label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gold-500);
  margin-bottom: 6px;
  display: block;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-navy-900);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-slate-300);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  background: var(--color-white);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-navy-600);
}

.form-note {
  font-size: 0.82rem;
  color: var(--color-slate-500);
  margin-top: 14px;
}

.form-success {
  display: none;
  background: var(--color-gold-100);
  border: 1px solid var(--color-gold-400);
  border-radius: var(--radius);
  padding: 16px 18px;
  font-size: 0.92rem;
  color: var(--color-navy-900);
  margin-bottom: 20px;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--color-navy-900);
  color: var(--color-slate-300);
  padding: 64px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand .brand {
  color: var(--color-white);
  margin-bottom: 14px;
}

.footer-brand p {
  color: var(--color-slate-300);
  font-size: 0.9rem;
  max-width: 280px;
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 18px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--color-slate-300);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--color-gold-400);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 0.82rem;
  color: var(--color-slate-500);
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: repeat(3, auto); gap: 28px; }
}

@media (max-width: 720px) {
  .nav-links,
  .nav-cta .btn {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav.open .nav-links {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-white);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-slate-100);
    box-shadow: var(--shadow-md);
  }

  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; gap: 20px; }
  .section { padding: 64px 0; }
}