/* ==========================================================================
   Chateck Quantum AI Concepts Limited — Site Stylesheet
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg-light: #F1F2F4;
  --bg-panel: #E9EAEC;
  --ink: #16181D;
  --ink-soft: #4B4F58;
  --orange: #F0923D;
  --orange-dark: #D97A28;
  --navy-box: #12141A;
  --white: #FFFFFF;
  --line: #D8D9DC;

  --font-display: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;

  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

.eyebrow {
  display: inline-block;
  border: 1.5px solid var(--orange);
  color: var(--orange-dark);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  padding: 8px 20px;
  border-radius: 999px;
  margin-bottom: 24px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--ink);
}

/* ---------------- Header ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(241, 242, 244, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 22px;
  padding-bottom: 22px;
}

.logo img {
  height: 26px;
  width: auto;
}

.main-nav {
  display: flex;
  gap: 40px;
}

.main-nav a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--ink);
  transition: color 0.2s ease;
}

.main-nav a:hover {
  color: var(--orange-dark);
}

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 26px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.btn-primary:hover {
  background: var(--orange-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(240, 146, 61, 0.35);
}

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

.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

/* ---------------- Hero ---------------- */
.hero {
  padding: 90px 0 70px;
  text-align: center;
}

.hero .eyebrow {
  margin-left: auto;
  margin-right: auto;
}

.hero h1 {
  font-size: 4.2rem;
  font-weight: 800;
  max-width: 900px;
  margin: 0 auto 32px;
}

.hero p {
  max-width: 780px;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 1.15rem;
  line-height: 1.7;
}

/* ---------------- Section base ---------------- */
section {
  padding: 64px 0;
}

.section-divider {
  border: none;
  border-top: 1px solid var(--line);
}

/* ---------------- Who We Are ---------------- */
.who-we-are .grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.who-we-are h2 {
  font-size: 2.4rem;
}

.who-we-are p {
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.who-we-are p strong {
  color: var(--ink);
}

/* ---------------- Group Structure ---------------- */
.group-structure .grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.group-structure .intro-text {
  color: var(--ink-soft);
  margin-bottom: 24px;
}

.subsidiary-line {
  margin-bottom: 18px;
  color: var(--ink-soft);
}

.subsidiary-line strong {
  color: var(--orange-dark);
}

.org-chart {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.org-box {
  background: var(--navy-box);
  color: var(--white);
  border-radius: 10px;
  text-align: center;
  padding: 18px 24px;
  width: 100%;
}

.org-box .label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--orange);
  font-weight: 600;
  margin-bottom: 6px;
}

.org-box .name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--orange);
}

.org-connector {
  width: 2px;
  height: 30px;
  background: var(--ink-soft);
}

.org-children {
  display: flex;
  gap: 24px;
  width: 100%;
  position: relative;
}

.org-children::before {
  content: '';
  position: absolute;
  top: -30px;
  left: 25%;
  right: 25%;
  height: 2px;
  background: var(--ink-soft);
}

.org-children .org-box {
  flex: 1;
  position: relative;
}

.org-children .org-box::before {
  content: '';
  position: absolute;
  top: -30px;
  left: 50%;
  width: 2px;
  height: 30px;
  background: var(--ink-soft);
}

/* ---------------- Subsidiaries ---------------- */
.subsidiary-block {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 56px;
}

.subsidiary-block:last-child {
  margin-bottom: 0;
}

.subsidiary-block.reverse .subsidiary-text {
  order: 2;
}

.subsidiary-block.reverse .subsidiary-image {
  order: 1;
}

.subsidiary-text h3 {
  font-size: 2.2rem;
  margin-bottom: 4px;
}

.subsidiary-text .tagline {
  font-style: italic;
  color: var(--orange-dark);
  font-weight: 600;
  margin-bottom: 20px;
  font-size: 1.05rem;
}

.subsidiary-text p {
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.feature-list li {
  color: var(--orange-dark);
  font-weight: 600;
  padding-left: 20px;
  position: relative;
  margin-bottom: 10px;
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--orange-dark);
  border-radius: 50%;
}

.subsidiary-image img {
  border-radius: 16px;
  margin: 0 auto;
  max-width: 480px;
  width: 100%;
}

/* ---------------- Leadership ---------------- */
.leadership {
  background: var(--bg-panel);
}

.leadership-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px;
}

.leadership-header h2 {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.leadership-header p {
  color: var(--ink-soft);
}

.leadership-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.leader-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 36px 24px;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.leader-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(20, 20, 20, 0.08);
}

.leader-monogram {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 1.5px solid var(--orange);
  color: var(--orange-dark);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.leader-card .leader-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  line-height: 1.35;
}

.leader-title {
  display: inline-block;
  background: var(--navy-box);
  color: var(--orange);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 6px 16px;
  border-radius: 999px;
}

/* ---------------- Footer / CTA ---------------- */
.footer-cta {
  background: var(--navy-box);
  color: var(--white);
  padding: 90px 0 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 70px;
}

.footer-top h2 {
  color: var(--white);
  font-size: 2.6rem;
  margin-bottom: 20px;
}

.footer-top p {
  color: #A7A9B0;
  margin-bottom: 30px;
}

.form-field {
  width: 100%;
  background: #1D2028;
  border: 1px solid #2C303A;
  color: var(--white);
  border-radius: 8px;
  padding: 15px 18px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.form-field::placeholder {
  color: #7C7F87;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

textarea.form-field {
  resize: vertical;
  min-height: 120px;
}

.btn-submit {
  width: 100%;
  background: var(--orange);
  color: var(--white);
  font-weight: 700;
  padding: 16px;
  border-radius: 8px;
  border: none;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

.btn-submit:hover {
  background: var(--orange-dark);
}

.form-status {
  margin-top: 14px;
  font-size: 0.9rem;
}

.form-status.success { color: #7CD68C; }
.form-status.error { color: #E58080; }

.footer-bottom {
  border-top: 1px solid #2C303A;
  padding-top: 40px;
}

.footer-columns {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 40px;
}

.footer-columns h4 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.footer-columns p {
  color: #A7A9B0;
}

.footer-columns .col-links li {
  color: #A7A9B0;
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.footer-legal {
  color: #6F727A;
  font-size: 0.85rem;
  border-top: 1px solid #2C303A;
  padding-top: 24px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .hero h1 { font-size: 3.2rem; }
  .leadership-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-columns { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .container { padding: 0 24px; }

  .main-nav {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: var(--bg-light);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }

  .main-nav a {
    padding: 18px 24px;
    border-bottom: 1px solid var(--line);
  }

  .nav-toggle { display: flex; }
  .header-cta { display: none; }

  .hero { padding: 40px 0 32px; }
  .hero h1 { font-size: 2.4rem; }
  .hero p { font-size: 1rem; }

  section { padding: 40px 0; }

  .who-we-are .grid-2,
  .group-structure .grid-2,
  .subsidiary-block,
  .subsidiary-block.reverse .subsidiary-text,
  .subsidiary-block.reverse .subsidiary-image {
    grid-template-columns: 1fr;
    order: initial;
  }

  .who-we-are .grid-2,
  .group-structure .grid-2,
  .subsidiary-block {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .subsidiary-block {
    margin-bottom: 32px;
  }

  .subsidiary-image img {
    max-width: 300px;
  }

  .group-structure .org-chart { margin-top: 12px; }

  .leadership-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .leadership-header { margin-bottom: 32px; }

  .footer-cta { padding: 48px 0 32px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; margin-bottom: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-columns { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .hero h1 { font-size: 1.9rem; }
  .leadership-grid { grid-template-columns: 1fr; }
  .footer-columns { grid-template-columns: 1fr; }
  .org-children { flex-direction: column; }
  .org-children::before { display: none; }
  .org-children .org-box::before { display: none; }
}