/* ==========================================================================
   Skysail Software Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Color Palette: Oceanic Deep Space & Vibrant Celestial Accents */
  --bg-darkest: #050811;
  --bg-base: #080d1a;
  --bg-surface: #0e172a;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(22, 33, 58, 0.85);
  --bg-glass: rgba(10, 16, 32, 0.78);
  --bg-badge: rgba(56, 189, 248, 0.1);

  --border-subtle: rgba(148, 163, 184, 0.12);
  --border-card: rgba(56, 189, 248, 0.18);
  --border-accent: rgba(56, 189, 248, 0.4);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;

  --accent-cyan: #06b6d4;
  --accent-sky: #38bdf8;
  --accent-indigo: #6366f1;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;

  --grad-primary: linear-gradient(135deg, #38bdf8 0%, #06b6d4 50%, #6366f1 100%);
  --grad-surface: linear-gradient(180deg, rgba(22, 33, 58, 0.5) 0%, rgba(11, 18, 33, 0.8) 100%);
  --grad-glow: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.15) 0%, transparent 70%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 40px -12px rgba(0, 0, 0, 0.6);
  --shadow-cyan-glow: 0 0 35px -5px rgba(6, 182, 212, 0.25);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --max-w-container: 1180px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base Setup */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Ambient Background Atmosphere */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 650px;
  background: radial-gradient(ellipse 65% 50% at 50% -10%, rgba(14, 165, 233, 0.18), transparent 70%),
              radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.12), transparent 45%),
              radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.08), transparent 40%);
  pointer-events: none;
  z-index: 0;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--max-w-container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  position: relative;
  z-index: 1;
}

/* Navigation Bar */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.28rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  display: block;
  filter: drop-shadow(0 2px 8px rgba(6, 182, 212, 0.4));
  transition: transform 0.3s ease;
}

.brand-link:hover .brand-icon {
  transform: translateY(-1px) scale(1.05);
}

.brand-text {
  background: linear-gradient(135deg, #ffffff 30%, #bae6fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.75rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  border-color: rgba(56, 189, 248, 0.3);
  box-shadow: 0 4px 16px rgba(2, 132, 199, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  box-shadow: 0 6px 22px rgba(14, 165, 233, 0.45);
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg-badge);
  color: var(--accent-sky);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.badge-emerald {
  background: rgba(16, 185, 129, 0.12);
  color: #34d399;
  border-color: rgba(52, 211, 153, 0.3);
}

/* Hero Section */
.hero {
  padding: 5.5rem 0 4rem;
  text-align: center;
}

.hero-badge-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.035em;
  margin-bottom: 1.4rem;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.text-gradient {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.28rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2.2rem;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.hero-highlights {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 2rem;
}

.hero-highlight-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.hero-highlight-item svg {
  color: var(--accent-emerald);
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  color: var(--accent-sky);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Featured App Spotlight */
.spotlight-card {
  background: var(--grad-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 3rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-cyan-glow);
}

.spotlight-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 3rem;
  align-items: center;
}

.app-meta-header {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 1.4rem;
}

.app-app-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.4), 0 0 20px rgba(56, 189, 248, 0.3);
}

.app-name {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.app-tagline {
  color: var(--accent-sky);
  font-size: 0.95rem;
  font-weight: 500;
}

.spotlight-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1.8rem;
  line-height: 1.7;
}

.feature-pill-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
}

.feature-pill {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  transition: var(--transition);
}

.feature-pill:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-card);
  transform: translateX(4px);
}

.pill-icon {
  color: var(--accent-cyan);
  margin-top: 0.15rem;
  flex-shrink: 0;
}

.pill-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}

.pill-sub {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.spotlight-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.spotlight-media {
  position: relative;
}

.graphic-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(56, 189, 248, 0.25);
  box-shadow: 0 16px 36px -8px rgba(0, 0, 0, 0.7);
  background: #000;
  position: relative;
}

.graphic-img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease;
}

.graphic-frame:hover .graphic-img {
  transform: scale(1.02);
}

/* Feature Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.info-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-sky), transparent);
  opacity: 0;
  transition: var(--transition);
}

.info-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-card);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.info-card:hover::before {
  opacity: 1;
}

.card-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-sky);
  margin-bottom: 1.4rem;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.015em;
}

.card-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Privacy & Tech Spec Section */
.architecture-box {
  background: #090e1d;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-top: 3rem;
}

.arch-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
  margin-top: 2rem;
}

.arch-step-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  position: relative;
}

.arch-step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.arch-step-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.arch-step-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Privacy Policy Dedicated Page Styles */
.policy-page {
  padding: 3.5rem 0 5rem;
}

.policy-header {
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 2rem;
}

.policy-badge {
  margin-bottom: 1rem;
}

.policy-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.policy-meta {
  display: flex;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.policy-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3.5rem;
  align-items: start;
}

.toc-card {
  position: sticky;
  top: 96px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.toc-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.toc-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  transition: var(--transition);
  display: block;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.toc-link:hover {
  color: var(--accent-sky);
  background: rgba(56, 189, 248, 0.08);
}

.policy-content {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

.policy-callout {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 2.5rem;
}

.policy-callout-title {
  color: #34d399;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.policy-section {
  margin-bottom: 3rem;
  scroll-margin-top: 100px;
}

.policy-section h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.policy-section p {
  margin-bottom: 1.2rem;
}

.policy-section ul {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.policy-section li {
  margin-bottom: 0.75rem;
}

.policy-section strong {
  color: var(--text-primary);
}

.code-snippet {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.06);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  color: var(--accent-sky);
}

.permissions-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0 2rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.permissions-table th,
.permissions-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.92rem;
}

.permissions-table th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-weight: 600;
}

.permissions-table tr:last-child td {
  border-bottom: none;
}

.contact-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  margin-top: 1.5rem;
}

.contact-list {
  list-style: none;
  margin: 1rem 0 0 0 !important;
  padding: 0 !important;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-darkest);
  padding: 4.5rem 0 2.5rem;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  max-width: 320px;
  margin-top: 1rem;
  line-height: 1.6;
}

.footer-col-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--accent-sky);
  transform: translateX(2px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .spotlight-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .arch-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
  .policy-layout {
    grid-template-columns: 1fr;
  }
  .toc-card {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
  }
  .nav-menu.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .arch-steps {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  .spotlight-card {
    padding: 1.8rem;
  }
}