/* ============================================
   Empyrean Pool Tips — Complementary Brand Style
   Base: dark palette with warm teal/cyan accents
   Differentiator: deeper navy tones, subtle gradients,
   slightly warmer feel than the main service site
   ============================================ */

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

:root {
  --bg-primary: #0a0f1a;
  --bg-secondary: #111827;
  --bg-card: #1a2236;
  --bg-card-hover: #1e2a42;
  --bg-glass: rgba(14, 116, 144, 0.06);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #0ea5c2;
  --accent-light: #22d3ee;
  --accent-dim: rgba(14, 165, 194, 0.15);
  --accent-glow: rgba(14, 165, 194, 0.25);
  --border: rgba(148, 163, 184, 0.08);
  --border-accent: rgba(14, 165, 194, 0.2);
  --radius: 12px;
  --radius-lg: 20px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 50px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #0891b2);
  color: #fff;
  box-shadow: 0 4px 24px rgba(14, 165, 194, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(14, 165, 194, 0.35);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-accent);
}

.btn-outline:hover {
  background: var(--accent-dim);
  color: var(--text-primary);
  border-color: var(--accent);
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1.05rem;
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 15, 26, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.logo-accent {
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--accent-light);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

.nav-cta {
  padding: 8px 20px;
  border-radius: 50px;
  background: var(--accent-dim);
  color: var(--accent-light) !important;
  border: 1px solid var(--border-accent);
}

.nav-cta:hover {
  background: var(--accent);
  color: #fff !important;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(14, 165, 194, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(14, 116, 144, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 80% 60%, rgba(34, 211, 238, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 720px;
}

.hero-tag {
  display: inline-block;
  padding: 8px 20px;
  border-radius: 50px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 32px;
  animation: fadeUp 0.8s ease both;
}

.hero h1 {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
  animation: fadeUp 0.8s ease 0.1s both;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent-light);
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.7;
  animation: fadeUp 0.8s ease 0.2s both;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
  animation: fadeUp 0.8s ease 0.3s both;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  animation: fadeUp 0.8s ease 0.4s both;
}

.stat {
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: fadeUp 0.8s ease 0.6s both;
}

.hero-scroll span {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  font-weight: 500;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ---- Section Headers ---- */
.section-header {
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

/* ---- Featured Video ---- */
.featured {
  padding: 120px 0 80px;
}

.featured-video {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: border-color var(--transition);
}

.featured-video:hover {
  border-color: var(--border-accent);
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  background: var(--bg-secondary);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.featured-info {
  padding: 32px;
}

.featured-info h3 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.featured-info p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.video-meta {
  display: flex;
  gap: 8px;
}

.meta-tag {
  padding: 5px 14px;
  border-radius: 50px;
  background: var(--accent-dim);
  color: var(--accent-light);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ---- Video Grid ---- */
.videos {
  padding: 80px 0 120px;
}

.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: 50px;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.video-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.card-thumb .video-wrapper {
  border-radius: 0;
}

.card-body {
  padding: 20px;
}

.card-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 8px;
}

.card-body h4 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  line-height: 1.35;
}

.card-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---- About ---- */
.about {
  padding: 120px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-content .section-header {
  margin-bottom: 24px;
}

.about-text {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-text a {
  color: var(--accent-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 14px;
}

.feature-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.about-feature span {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
}

.about-visual {
  display: flex;
  justify-content: center;
}

.visual-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  max-width: 380px;
  position: relative;
}

.visual-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, var(--border-accent), transparent 60%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.visual-icon {
  color: var(--accent);
  margin-bottom: 24px;
}

.visual-quote {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.visual-attr {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---- Subscribe CTA ---- */
.subscribe {
  padding: 120px 0;
}

.subscribe-card {
  text-align: center;
  padding: 80px 40px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse 70% 50% at 50% 100%, rgba(14, 165, 194, 0.1) 0%, transparent 60%),
    var(--bg-card);
  border: 1px solid var(--border-accent);
  position: relative;
  overflow: hidden;
}

.subscribe-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.subscribe-card h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.subscribe-card p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 480px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.subscribe-note {
  font-size: 0.85rem !important;
  color: var(--text-muted) !important;
  margin-top: 16px !important;
}

/* ---- Footer ---- */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.footer-brand .logo-text,
.footer-brand .logo-accent {
  font-size: 1.1rem;
}

.footer-sub {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-sub a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---- Animations ---- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    gap: 48px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .mobile-menu {
    display: flex;
  }

  .hero {
    padding: 100px 20px 60px;
    min-height: auto;
    min-height: 90vh;
  }

  .hero-stats {
    gap: 24px;
  }

  .stat-num {
    font-size: 1.35rem;
  }

  .hero-scroll {
    display: none;
  }

  .featured {
    padding: 80px 0 60px;
  }

  .featured-info {
    padding: 24px;
  }

  .videos {
    padding: 60px 0 80px;
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .about {
    padding: 80px 0;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .subscribe {
    padding: 80px 0;
  }

  .subscribe-card {
    padding: 48px 24px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .filter-bar {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
  }

  .filter-btn {
    flex-shrink: 0;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
}