/* ==========================================================================
   home.css — Styles for BTCC Home Page (index.html)
   ========================================================================== */

/* --------------------------------------------------------------------------
   01. HERO SECTION (India Gate Visual)
   -------------------------------------------------------------------------- */
.theme-hero {
  background-color: #ffffff;
  padding-top: 45px;
  padding-bottom: 50px;
}

.hero-split-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-title-main {
  font-family: var(--font-serif);
  font-size: clamp(2.3rem, 3.6vw, 3.1rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--primary-navy);
  margin-bottom: 1.4rem;
}

.title-line-underlined {
  display: inline-block;
  position: relative;
  padding-bottom: 4px;
}

.title-line-underlined::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-gold);
}

.title-line-second {
  display: block;
}

.hero-theme-subtitle {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--primary-navy);
  margin-bottom: 0.6rem;
}

.hero-theme-verbs {
  font-size: 0.88rem;
  font-weight: 500;
  color: #64748b;
  margin-bottom: 1.25rem;
}

.hero-theme-copy {
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 2rem;
}

.hero-theme-buttons {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hero-visual-col {
  position: relative;
}

.hero-image-frame {
  position: relative;
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.hero-image-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.stat-overlay-card {
  position: absolute;
  bottom: -20px;
  left: 30px;
  background-color: #ffffff;
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.4rem;
  border: 1px solid var(--border-light);
}

.stat-gold-badge {
  background-color: var(--accent-gold);
  color: #ffffff;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-content {
  display: flex;
  flex-direction: column;
}

.stat-sub-text {
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #64748b;
  line-height: 1.2;
}

.stat-year-number {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-gold);
  line-height: 1;
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   02. SIX ICON PILLARS STRIP
   -------------------------------------------------------------------------- */
.pillars-strip-section {
  padding-bottom: 45px;
}

.pillars-strip-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.04);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  padding: 1.5rem 0.5rem;
}

.strip-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 0.75rem;
  border-right: 1px solid #f1f5f9;
}

.strip-node:last-child {
  border-right: none;
}

.node-icon {
  color: var(--primary-navy);
  margin-bottom: 0.65rem;
}

.node-caption {
  font-size: 0.78rem;
  font-weight: 600;
  color: #334155;
  line-height: 1.35;
}

/* --------------------------------------------------------------------------
   03. THE BTCC IDEA SECTION
   -------------------------------------------------------------------------- */
.theme-idea-section {
  padding-top: 45px;
  padding-bottom: 55px;
  border-top: 1px solid #f1f5f9;
}

.idea-split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.idea-heading {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  color: var(--primary-navy);
  line-height: 1.25;
  margin-bottom: 1.25rem;
}

.idea-heading-underlined {
  display: inline-block;
  position: relative;
  padding-bottom: 2px;
}

.idea-heading-underlined::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-gold);
}

.idea-description {
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.link-know-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-blue-link);
}

.link-know-more:hover {
  text-decoration: underline;
}

.observatory-wrapper {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.observatory-img {
  width: 100%;
  height: auto;
  display: block;
}

.observatory-labels-card {
  position: absolute;
  top: 24px;
  right: 24px;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(4px);
  padding: 1.1rem 1.25rem;
  border-radius: 4px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
}

.labels-gold-line {
  width: 1.5px;
  height: 80px;
  background-color: var(--accent-gold);
}

.labels-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary-navy);
}

/* --------------------------------------------------------------------------
   04. WHY CAPABILITY MATTERS & CHAIN
   -------------------------------------------------------------------------- */
.theme-capability-matters {
  padding-top: 45px;
  padding-bottom: 55px;
  border-top: 1px solid #f1f5f9;
}

.matters-split-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 3rem;
  align-items: center;
}

.matters-statement {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--text-muted);
  margin: 0.5rem 0 1.25rem 0;
}

.capability-chain-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.chain-circle-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
  min-width: 72px;
}

.circle-badge {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid #bfdbfe;
  background-color: #eff6ff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.chain-circle-item:hover .circle-badge {
  border-color: #3b82f6;
  background-color: #dbeafe;
}

.circle-label {
  font-size: 0.74rem;
  font-weight: 600;
  color: #334155;
  line-height: 1.2;
}

.chain-chevron {
  color: #94a3b8;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 1.2rem;
}

/* --------------------------------------------------------------------------
   05. 2047 TECHNOLOGY IMPERATIVE BANNER (Mountain Panorama)
   -------------------------------------------------------------------------- */
.theme-imperative-banner {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 60px 0;
  color: #ffffff;
}

.banner-dark-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(14, 27, 46, 0.88) 0%, rgba(14, 27, 46, 0.65) 60%, rgba(14, 27, 46, 0.88) 100%);
}

.imperative-banner-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.banner-tag {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-gold-light);
  margin-bottom: 0.65rem;
}

.banner-heading {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.3;
  color: #ffffff;
}

.banner-center-card {
  display: flex;
  align-items: stretch;
  background: rgba(14, 27, 46, 0.65);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  overflow: hidden;
}

.card-gold-accent {
  width: 4px;
  background-color: var(--accent-gold);
}

.card-text-inner {
  padding: 1.4rem 1.6rem;
}

.card-text-inner p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: #f1f5f9;
  margin-bottom: 0.75rem;
}

.banner-know-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffffff;
}

.banner-right-stat {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  justify-content: flex-end;
}

.stat-vertical-sep {
  width: 1px;
  height: 70px;
  background-color: rgba(255, 255, 255, 0.25);
}

.big-2047 {
  font-family: var(--font-serif);
  font-size: 3.4rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1;
}

.sub-2047 {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #e2e8f0;
  margin-top: 4px;
}

/* --------------------------------------------------------------------------
   06. CAPABILITY FRONTIERS (8 Horizontal Cards matching reference)
   -------------------------------------------------------------------------- */
.theme-frontiers-section {
  padding-top: 55px;
  padding-bottom: 55px;
  background-color: #ffffff;
}

.section-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.75rem;
}

.section-main-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--primary-navy);
}

.section-main-subtitle {
  font-size: 0.88rem;
  color: #64748b;
  margin-top: 2px;
}

.view-all-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-blue-link);
}

.frontiers-scroll-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.frontier-thumb-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.2s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.frontier-thumb-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  border-color: #cbd5e1;
}

.thumb-frame {
  height: 130px;
  overflow: hidden;
}

.thumb-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.frontier-thumb-card:hover .thumb-frame img {
  transform: scale(1.04);
}

.thumb-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary-navy);
  line-height: 1.35;
}

.thumb-title .arr {
  color: var(--text-blue-link);
  font-size: 0.95rem;
  margin-left: 6px;
}

/* --------------------------------------------------------------------------
   07. CAPABILITY MISSIONS (3 Photo Cards matching reference)
   -------------------------------------------------------------------------- */
.theme-missions-section {
  padding-top: 55px;
  padding-bottom: 60px;
  background-color: #ffffff;
}

.missions-trio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.mission-large-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
  transition: all 0.2s;
}

.mission-large-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
}

.mission-card-image {
  height: 170px;
  overflow: hidden;
}

.mission-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mission-card-content {
  padding: 1.5rem 1.4rem;
  position: relative;
}

.mission-card-title {
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--primary-navy);
  margin-bottom: 0.6rem;
  line-height: 1.35;
}

.mission-card-text {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.mission-card-arrow {
  color: #3b82f6;
  font-size: 1.1rem;
  font-weight: 600;
  text-align: right;
}

/* --------------------------------------------------------------------------
   08. FOUR FEATURE CARDS GRID (Bottom White Cards)
   -------------------------------------------------------------------------- */
.theme-four-features-section {
  padding-top: 45px;
  padding-bottom: 50px;
  background-color: #ffffff;
}

.four-features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.feature-box {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 1.75rem 1.4rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-icon {
  margin-bottom: 1rem;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary-navy);
  line-height: 1.3;
  margin-bottom: 0.65rem;
}

.feature-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
}

.feature-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-blue-link);
}

.feature-link:hover {
  text-decoration: underline;
}

/* Engagement Anchor Section */
.engage-anchor-section {
  padding-bottom: 50px;
}

.engage-anchor-card {
  background-color: var(--bg-soft-ivory);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 1.5rem 2rem;
  text-align: center;
}

.engage-anchor-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 0.4rem;
}

.engage-anchor-sub {
  font-size: 0.82rem;
  color: #64748b;
}

/* --------------------------------------------------------------------------
   09. HOME RESPONSIVE DESIGN
   -------------------------------------------------------------------------- */
@media (max-width: 1100px) {
  .frontiers-scroll-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .four-features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .imperative-banner-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .banner-right-stat {
    justify-content: flex-start;
  }
}

@media (max-width: 900px) {
  .hero-split-grid,
  .idea-split-grid,
  .matters-split-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .pillars-strip-card {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem 0;
  }
  .strip-node:nth-child(3) {
    border-right: none;
  }
  .missions-trio-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .pillars-strip-card {
    grid-template-columns: repeat(2, 1fr);
  }
  .strip-node {
    border-right: none !important;
  }
  .frontiers-scroll-grid,
  .four-features-grid {
    grid-template-columns: 1fr;
  }
}