/* Cloud Sea Horizon Theme v86 */
:root {
  --cloudsea-bg: #0a1322;
  --cloudsea-surface: rgba(21, 35, 60, 0.75);
  --cloudsea-card: rgba(30, 48, 80, 0.85);
  --cloudsea-sky: #38bdf8;
  --cloudsea-cloud: #e0f2fe;
  --cloudsea-horizon: #fef08a;
  --cloudsea-accent: #0284c7;
  --cloudsea-heading: #ffffff;
  --cloudsea-text: #f1f5f9;
  --cloudsea-muted: #94a3b8;
  --cloudsea-border: rgba(56, 189, 248, 0.25);
  --cloudsea-radius: 20px;
  --cloudsea-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  --cloudsea-glow: 0 0 32px rgba(56, 189, 248, 0.35);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--cloudsea-bg);
  background-image: 
    radial-gradient(at 50% 0%, rgba(56, 189, 248, 0.22) 0px, transparent 65%),
    radial-gradient(at 20% 80%, rgba(224, 242, 254, 0.12) 0px, transparent 50%),
    radial-gradient(at 80% 50%, rgba(254, 240, 138, 0.1) 0px, transparent 50%);
  color: var(--cloudsea-text);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

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

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

/* Header Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 19, 34, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--cloudsea-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 800;
  color: var(--cloudsea-heading);
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--cloudsea-sky) 0%, var(--cloudsea-cloud) 100%);
  color: #0a1322;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.35);
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--cloudsea-muted);
  padding: 8px 12px;
  border-radius: 20px;
}

.nav-link:hover, .nav-link.active {
  color: var(--cloudsea-heading);
  background: rgba(56, 189, 248, 0.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.25s ease;
  will-change: transform;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cloudsea-accent) 0%, var(--cloudsea-sky) 100%);
  color: #ffffff;
  font-weight: 800;
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.38);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(224, 242, 254, 0.5);
}

.btn-outline {
  background: rgba(56, 189, 248, 0.08);
  color: var(--cloudsea-heading);
  border: 1px solid var(--cloudsea-border);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  border-color: var(--cloudsea-sky);
  background: rgba(56, 189, 248, 0.18);
  transform: translateY(-2px);
}

/* Cloud Sea Hero */
.hero {
  position: relative;
  padding: 85px 0 70px;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.28) 0%, rgba(10, 19, 34, 0.8) 60%, rgba(10, 19, 34, 1) 90%);
  border-bottom: 1px solid var(--cloudsea-border);
  overflow: hidden;
}

.cloudsea-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(rgba(224, 242, 254, 0.15) 1px, transparent 0);
  background-size: 36px 36px;
  pointer-events: none;
  opacity: 0.6;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 22px;
  font-size: 14px;
  font-weight: 700;
  color: var(--cloudsea-sky);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid var(--cloudsea-border);
  backdrop-filter: blur(12px);
  border-radius: 30px;
  margin-bottom: 24px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.hero-title {
  font-size: 46px;
  font-weight: 900;
  color: var(--cloudsea-heading);
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-title span {
  color: var(--cloudsea-sky);
  text-shadow: 0 0 25px rgba(56, 189, 248, 0.45);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--cloudsea-muted);
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.hero-card {
  background: rgba(30, 48, 80, 0.75);
  border: 1px solid var(--cloudsea-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--cloudsea-radius);
  padding: 14px;
  box-shadow: var(--cloudsea-shadow);
  transition: all 0.3s ease;
  will-change: transform;
}

.hero-card:hover {
  transform: translateY(-6px);
  border-color: var(--cloudsea-sky);
  box-shadow: var(--cloudsea-glow);
}

.hero-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 12px;
  content-visibility: auto;
}

.hero-card-caption {
  margin-top: 12px;
  font-size: 14px;
  font-weight: 700;
  color: var(--cloudsea-heading);
}

/* Sections */
.section {
  padding: 72px 0;
  border-bottom: 1px solid var(--cloudsea-border);
  content-visibility: auto;
  contain-intrinsic-size: 1px 600px;
}

.section-panel {
  background: rgba(21, 35, 60, 0.45);
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--cloudsea-heading);
  margin-bottom: 12px;
}

.section-title p {
  font-size: 16px;
  color: var(--cloudsea-muted);
}

/* 3x3 Card Grid - Why Choose */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: rgba(30, 48, 80, 0.75);
  border: 1px solid var(--cloudsea-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--cloudsea-radius);
  padding: 30px 26px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cloudsea-sky) 0%, var(--cloudsea-cloud) 100%);
}

.feature-card:hover {
  border-color: var(--cloudsea-sky);
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.22);
  transform: translateY(-4px);
}

.feature-num {
  width: 44px;
  height: 44px;
  background: rgba(56, 189, 248, 0.18);
  color: var(--cloudsea-sky);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--cloudsea-heading);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--cloudsea-muted);
  line-height: 1.65;
}

/* Blog / Tutorials Section */
.blog-grid {
  display grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.blog-card {
  background: rgba(30, 48, 80, 0.75);
  border: 1px solid var(--cloudsea-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--cloudsea-radius);
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

.blog-card:hover {
  border-color: var(--cloudsea-sky);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35);
  transform: translateY(-4px);
}

.blog-date {
  font-size: 13px;
  font-weight: 700;
  color: var(--cloudsea-sky);
  margin-bottom: 8px;
}

.blog-card h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--cloudsea-heading);
  margin-bottom: 12px;
}

.blog-card p {
  font-size: 14px;
  color: var(--cloudsea-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.blog-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--cloudsea-sky);
}

.blog-link:hover {
  color: var(--cloudsea-cloud);
  text-decoration: underline;
}

.more-wrapper {
  text-align: center;
  margin-top: 40px;
}

/* FAQ Section */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-item {
  background: rgba(30, 48, 80, 0.75);
  border: 1px solid var(--cloudsea-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--cloudsea-radius);
  padding: 26px 30px;
}

.faq-question {
  font-size: 18px;
  font-weight: 800;
  color: var(--cloudsea-heading);
  margin-bottom: 10px;
}

.faq-answer {
  font-size: 15px;
  color: var(--cloudsea-muted);
  line-height: 1.7;
}

/* Download Grid */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.download-card {
  background: rgba(30, 48, 80, 0.75);
  border: 1px solid var(--cloudsea-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--cloudsea-radius);
  padding: 34px 24px;
  text-align: center;
  transition: all 0.3s ease;
}

.download-card:hover {
  border-color: var(--cloudsea-sky);
  box-shadow: var(--cloudsea-glow);
  transform: translateY(-5px);
}

.download-card-icon {
  font-size: 42px;
  margin-bottom: 16px;
}

.download-card h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--cloudsea-heading);
  margin-bottom: 10px;
}

.download-card p {
  font-size: 14px;
  color: var(--cloudsea-muted);
  margin-bottom: 24px;
}

.download-web-banner {
  background: rgba(30, 48, 80, 0.85);
  border: 1px solid var(--cloudsea-sky);
  backdrop-filter: blur(16px);
  color: #ffffff;
  border-radius: var(--cloudsea-radius);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.download-web-banner h3 {
  font-size: 21px;
  color: #ffffff;
  margin-bottom: 6px;
}

.download-web-banner p {
  color: var(--cloudsea-muted);
  font-size: 15px;
}

/* Dark Footer */
.footer {
  background: #050a14;
  color: #94a3b8;
  padding: 64px 0 32px;
  border-top: 3px solid var(--cloudsea-sky);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-col p {
  font-size: 14px;
  color: #94a3b8;
  line-height: 1.7;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: #94a3b8;
}

.footer-col ul li a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 28px;
  text-align: center;
  font-size: 14px;
  color: #64748b;
}

@media (max-width: 992px) {
  .hero-showcase, .features-grid, .download-grid {
    grid-template-columns: 1fr;
  }
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .download-web-banner {
    flex-direction: column;
    text-align: center;
  }
}