/* ============================================================
   ChronoSeal Design System — chronoseal.css
   Vibrant, premium, glassmorphism theme matching the target site
   ============================================================ */

/* ---- Custom Properties ---- */
:root {
  --bg-primary:     #0a0e27;
  --bg-secondary:   #11162e;
  --bg-card:        rgba(18, 24, 48, 0.7);
  --bg-card-solid:  #121830;
  --border:         rgba(56, 78, 135, 0.3);
  --border-glow:    rgba(0, 255, 255, 0.2);
  --text-primary:   #ffffff;
  --text-secondary: #a0a8c3;
  --text-muted:     #5a6490;
  
  --accent-cyan:    #00e5ff;
  --accent-purple:  #b84eff;
  --accent-green:   #00ff88;
  --accent-red:     #ff4757;
  
  --gradient-1:     linear-gradient(135deg, #00e5ff 0%, #b84eff 100%);
  --gradient-2:     linear-gradient(135deg, #00ff88 0%, #00e5ff 100%);
  --shadow-glow:    0 0 30px rgba(0, 229, 255, 0.1);
  
  --font-sans:      -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono:      'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  
  --max-width:      1400px;
  --header-h:       75px;
  --r-sm:           8px;
  --r-md:           12px;
  --r-lg:           20px;
  --ease:           cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --tr:             .3s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--tr);
}

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

img, svg {
  max-width: 100%;
  display: block;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

code, pre {
  font-family: var(--font-mono);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* ---- Layout ---- */
.container, .main-content {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.main-content {
  padding-top: var(--header-h);
}

.section {
  padding: 6rem 0;
  scroll-margin-top: 100px;
}

.text-center {
  text-align: center;
}

.arch-diagram {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 2rem auto;
  max-width: 100%;
}

.arch-diagram svg {
  display: block;
  margin: 0 auto;
  max-width: 100%;
}

.section--alt {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* ============================================================
   BACKGROUND ANIMATION
   ============================================================ */
.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.gradient-sphere {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 20s infinite ease-in-out;
  will-change: transform;
}

.sphere-1 { width: 600px; height: 600px; background: var(--accent-cyan); top: -200px; right: -200px; animation-delay: 0s; }
.sphere-2 { width: 500px; height: 500px; background: var(--accent-purple); bottom: -150px; left: -150px; animation-delay: -5s; }
.sphere-3 { width: 400px; height: 400px; background: var(--accent-green); top: 40%; left: 30%; animation-delay: -10s; opacity: 0.2; }

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ============================================================
   NAVBAR / HEADER
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  padding: 1.25rem 2rem;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  padding: 0.75rem 2rem;
  background: rgba(10, 14, 39, 0.98);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-decoration: none;
}

.logobar {
  width: 32px;
  height: 32px;
}

.logo span {
  color: transparent;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text-primary);
  text-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
}

.github-btn {
  background: var(--bg-card-solid);
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.github-btn:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.2);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  transition: color 0.3s ease;
}

/* Nav Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 15px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 220px;
  background: var(--bg-card-solid);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--tr), transform var(--tr);
  box-shadow: 0 16px 48px rgba(0,0,0,.4);
  backdrop-filter: blur(10px);
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-menu a {
  display: block;
  padding: 8px 14px;
  font-size: .88rem;
  color: var(--text-secondary);
  border-radius: var(--r-sm);
  transition: all var(--tr);
}

.nav-dropdown-menu a:hover {
  color: var(--text-primary);
  background: rgba(0, 229, 255, 0.05);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  text-align: center;
  padding: 6rem 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: rgba(0, 229, 255, 0.05);
  border: 1px solid var(--border-glow);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--accent-cyan);
  margin-bottom: 2rem;
  font-weight: 500;
}

.hero h1 {
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2.5rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  padding: 0.875rem 2rem;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--tr);
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--gradient-1);
  color: var(--bg-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 229, 255, 0.4);
}

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

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.05);
}

.btn-ghost {
  color: var(--text-secondary);
  border: 1px solid transparent;
}
.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border);
  background: rgba(255,255,255,0.05);
}
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* ============================================================
   STATS ROW
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
  margin-bottom: 6rem;
}

.stat-card {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}

.stat-label {
  color: var(--text-secondary);
  margin-top: 1rem;
  font-weight: 500;
  font-size: 1.1rem;
}

/* ============================================================
   SECTION HEADER
   ============================================================ */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: var(--gradient-2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
}

/* ============================================================
   FEATURES GRID / CARDS
   ============================================================ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem;
  transition: all 0.4s var(--ease);
}

.card:hover {
  transform: translateY(-10px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.card-icon {
  width: 64px;
  height: 64px;
  background: rgba(0, 229, 255, 0.1);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(0, 229, 255, 0.2);
}

.card-icon i {
  font-size: 1.75rem;
  color: var(--accent-cyan);
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  padding: 0.35rem 0.85rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--text-primary);
  font-weight: 500;
  border: 1px solid var(--border);
}

/* ============================================================
   STEPS / HOW IT WORKS
   ============================================================ */
.steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 2rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--tr);
}

.step:hover {
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.step-number {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-1);
  color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 800;
}

.step-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

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

/* ============================================================
   COMPARISON TABLE
   ============================================================ */
.comparison-table-wrap {
  overflow-x: auto;
  background: var(--bg-card);
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 1rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.comparison-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
}

.comparison-table-wrap th, .comparison-table-wrap td {
  padding: 1.25rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.comparison-table-wrap th {
  color: var(--text-primary);
  font-weight: 600;
  background: rgba(0, 229, 255, 0.05);
}

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

.check {
  color: var(--accent-green);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

td.check {
  display: table-cell;
}

td.check i {
  margin-right: 0.4rem;
}

.times {
  color: var(--accent-red);
  opacity: 0.7;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

td.times {
  display: table-cell;
}

td.times i {
  margin-right: 0.4rem;
}

/* ============================================================
   CODE BLOCKS
   ============================================================ */
.code-block {
  background: #080b1a;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  overflow-x: auto;
  font-size: 0.9rem;
  margin: 1.5rem 0;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
  position: relative;
}

.code-block-center {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.code-block pre {
  color: #a0a8c3;
  line-height: 1.5;
  font-family: var(--font-mono);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding-bottom: 0.5rem;
}

.code-lang {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-copy-btn {
  font-size: 0.75rem;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.03);
  transition: all var(--tr);
}
.code-copy-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-cyan);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 5rem 2rem 2rem;
  margin-top: 6rem;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 4rem;
}

.footer-section h4 {
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.footer-section p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-section a {
  display: inline-block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 0.75rem;
  transition: all var(--tr);
  font-size: 0.95rem;
}

.footer-section a:hover {
  color: var(--accent-cyan);
  transform: translateX(5px);
}

.footer-bottom {
  text-align: center;
  padding-top: 3rem;
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================================
   SEARCH OVERLAY
   ============================================================ */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--tr);
}

.search-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.search-box {
  width: 100%;
  max-width: 580px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transform: translateY(16px);
  transition: transform var(--tr);
  box-shadow: 0 24px 64px rgba(0,0,0,.5);
}

.search-overlay.open .search-box {
  transform: translateY(0);
}

.search-input-wrap {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  gap: 12px;
  border-bottom: 1px solid var(--border);
}

.search-input-wrap svg {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-size: 1rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-kbd {
  font-size: .7rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-card-solid);
}

.search-results {
  max-height: 360px;
  overflow-y: auto;
  padding: 8px;
}

.search-result {
  display: block;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  transition: background var(--tr);
}

.search-result:hover, .search-result.selected {
  background: rgba(0, 229, 255, 0.05);
}

.search-result-title {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.search-result-desc {
  font-size: .8rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.search-empty {
  padding: 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: .9rem;
}

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card-solid);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 1.1rem;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: all var(--tr);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  background: rgba(0, 229, 255, 0.05);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ============================================================
   ANIMATION INTERSECT
   ============================================================ */
.animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.animate.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(15px);
    flex-direction: column;
    padding: 2rem 1rem;
    border-bottom: 1px solid var(--border);
    gap: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  }

  .nav-links.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-toggle {
    display: block;
  }
}