/* ============================================================
   Hero Section
   ============================================================ */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 85vh;
  padding: var(--space-24) var(--container-padding);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

/* Multi-layered overlay for depth */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(110, 193, 228, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(97, 206, 112, 0.05) 0%, transparent 50%),
    linear-gradient(180deg,
      rgba(13, 17, 23, 0.7) 0%,
      rgba(32, 41, 89, 0.75) 40%,
      rgba(13, 17, 23, 0.9) 100%
    );
}

/* Bottom vignette fade */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--color-bg) 0%, transparent 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  animation: fadeInUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

.hero-logo {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-lg);
  margin: 0 auto var(--space-8);
  box-shadow: var(--shadow-xl), var(--shadow-glow-sky);
  animation: fadeIn 1s ease 0.1s both;
}

.hero h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-5);
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(135deg,
    var(--color-white) 0%,
    var(--color-white) 40%,
    var(--color-sky-bright) 70%,
    var(--color-green) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-10);
  line-height: 1.6;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: linear-gradient(135deg, var(--color-sky) 0%, var(--color-sky-dim) 100%);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md), 0 0 20px rgba(110, 193, 228, 0.2);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero-cta:hover {
  color: var(--color-white);
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(110, 193, 228, 0.35), 0 0 80px rgba(110, 193, 228, 0.15);
}

.hero-cta:active {
  transform: translateY(0) scale(0.98);
  transition-duration: 100ms;
}

.hero-cta svg {
  transition: transform var(--transition-fast);
}

.hero-cta:hover svg {
  transform: translateX(3px);
}

/* ============================================================
   Feature / Mission Section
   ============================================================ */
.feature-section {
  position: relative;
  padding: var(--space-24) var(--container-padding);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.feature-section::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg,
    var(--color-bg) 0%,
    rgba(13, 17, 23, 0.88) 10%,
    rgba(13, 17, 23, 0.82) 50%,
    rgba(13, 17, 23, 0.88) 90%,
    var(--color-bg) 100%
  );
}

.feature-content {
  position: relative;
  z-index: 2;
  max-width: var(--content-max);
  margin: 0 auto;
  text-align: center;
}

.feature-content h2 {
  margin-bottom: var(--space-6);
}

.feature-content > p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* Feature Grid */
.feature-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-16);
}

.feature-card {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: var(--space-8) var(--space-6);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), transform var(--transition-base),
    box-shadow var(--transition-base);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-sky), transparent);
  opacity: 0;
  transition: opacity var(--transition-base), width var(--transition-base);
}

.feature-card:hover::before {
  opacity: 1;
  width: 60%;
}

.feature-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 2.2rem;
  margin-bottom: var(--space-5);
  filter: saturate(0.85);
}

.feature-card h3 {
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* ============================================================
   Page Header (non-home pages)
   ============================================================ */
.page-header {
  position: relative;
  padding: calc(var(--header-height) + var(--space-20)) var(--container-padding) var(--space-16);
  background-color: var(--color-navy-deep);
  text-align: center;
  overflow: hidden;
}

/* Decorative gradient orb behind heading */
.page-header::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse,
    rgba(110, 193, 228, 0.08) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.page-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--color-border-hover) 50%,
    transparent 100%
  );
}

.page-header h1 {
  position: relative;
  margin-bottom: var(--space-4);
  animation: fadeInUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
  background: linear-gradient(135deg,
    var(--color-white) 0%,
    var(--color-white) 50%,
    var(--color-sky-bright) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-header p {
  position: relative;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  max-width: var(--content-max);
  margin: 0 auto;
  animation: fadeInUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.25s both;
}

/* ============================================================
   Article Cards
   ============================================================ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(340px, 100%), 1fr));
  gap: var(--space-8);
}

.article-card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base),
    box-shadow var(--transition-base);
}

.article-card:hover {
  border-color: rgba(110, 193, 228, 0.25);
  transform: translateY(-8px) scale(1.01);
  box-shadow: var(--shadow-xl), var(--shadow-glow-sky),
    0 0 0 1px rgba(110, 193, 228, 0.08);
}

.article-card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.article-card:hover .article-card-image {
  transform: scale(1.03);
}

.article-card-body {
  padding: var(--space-6);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.article-card-category {
  display: inline-block;
  background: rgba(110, 193, 228, 0.1);
  color: var(--color-sky);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid rgba(110, 193, 228, 0.15);
}

.article-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.article-card h3 a {
  color: var(--color-white);
  transition: color var(--transition-fast);
}

.article-card h3 a:hover {
  color: var(--color-sky);
}

.article-card-excerpt {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-5);
  line-height: 1.7;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-sky);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
  transition: gap var(--transition-fast);
}

.read-more:hover {
  gap: var(--space-3);
  color: var(--color-sky-bright);
}

.read-more svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  transition: transform var(--transition-fast);
}

.read-more:hover svg {
  transform: translateX(4px);
}

.read-more::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-sky);
  transition: width var(--transition-base);
}

.read-more:hover::after {
  width: calc(100% - 24px);
}

/* ============================================================
   Article / Post Content
   ============================================================ */
.article-content {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-16) var(--container-padding);
}

.article-content h2 {
  margin-top: var(--space-16);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
  margin-top: var(--space-10);
  margin-bottom: var(--space-3);
  color: var(--color-sky-bright);
}

.article-content h4 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

.article-content p {
  line-height: 1.85;
  color: var(--color-text);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-6);
}

.article-content li {
  line-height: 1.75;
  color: var(--color-text);
}

.article-content a {
  text-decoration: underline;
  text-decoration-color: rgba(110, 193, 228, 0.25);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast), color var(--transition-fast);
}

.article-content a:hover {
  text-decoration-color: var(--color-sky);
  color: var(--color-sky-bright);
}

/* Post Meta Bar */
.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  margin-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.post-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Featured Image */
.featured-image {
  width: 100%;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-10);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

/* Summary Box */
.summary-box {
  position: relative;
  background: linear-gradient(135deg,
    rgba(110, 193, 228, 0.06) 0%,
    rgba(97, 206, 112, 0.04) 100%
  );
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-sky);
  border-radius: var(--radius-md);
  padding: var(--space-6) var(--space-8);
  margin: var(--space-10) 0;
}

.summary-box::before {
  content: '';
  position: absolute;
  top: -1px;
  right: -1px;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at top right,
    rgba(110, 193, 228, 0.08) 0%,
    transparent 70%
  );
  border-radius: 0 var(--radius-md) 0 0;
  pointer-events: none;
}

.summary-box h3 {
  margin-top: 0;
  margin-bottom: var(--space-3);
  color: var(--color-white);
  font-size: var(--text-lg);
}

/* ============================================================
   Responsive - Mobile
   ============================================================ */
@media (max-width: 768px) {
  .page-header {
    padding: calc(var(--header-height) + var(--space-12)) var(--container-padding) var(--space-10);
  }

  .page-header h1 {
    font-size: var(--text-2xl);
  }

  .article-content {
    padding: var(--space-10) var(--container-padding);
  }

  .article-content h2 {
    margin-top: var(--space-10);
    font-size: var(--text-xl);
  }

  .article-card-body {
    padding: var(--space-4);
  }

  .summary-box {
    padding: var(--space-5) var(--space-5);
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin-top: var(--space-10);
  }

  .feature-card {
    padding: var(--space-6) var(--space-5);
  }
}

@media (max-width: 480px) {
  .article-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .page-header h1 {
    font-size: var(--text-xl);
  }

  .article-content h2 {
    font-size: var(--text-lg);
  }
}