/* ==========================================================================
   Modern Web Architecture Showcase - Design System & Stylesheet
   Theme: Futuristic Dark Glassmorphism with Dynamic Accents
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Variables & Theme Setup
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette */
  --bg-dark: #0b0f19;
  --bg-dark-card: rgba(17, 24, 39, 0.75);
  --bg-dark-elevated: rgba(30, 41, 59, 0.6);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-glow: rgba(139, 92, 246, 0.3);

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  /* Accent Colors for 4 Pillars */
  --color-spa: #06b6d4;      /* Cyan / Electric Blue */
  --color-jamstack: #ec4899; /* Vibrant Pink / Rose */
  --color-wp: #10b981;       /* Emerald / WP Green */
  --color-pwa: #8b5cf6;      /* Violet / Purple */

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
  --grad-alt: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
  --grad-wp: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --grad-pwa: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);

  /* Typography */
  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Shadows & Glassmorphism */
  --glass-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  --glow-shadow-spa: 0 0 25px rgba(6, 182, 212, 0.25);
  --glow-shadow-jamstack: 0 0 25px rgba(236, 72, 153, 0.25);
  --glow-shadow-wp: 0 0 25px rgba(16, 185, 129, 0.25);
  --glow-shadow-pwa: 0 0 25px rgba(139, 92, 246, 0.25);

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Overrides */
body.light-theme {
  --bg-dark: #f8fafc;
  --bg-dark-card: rgba(255, 255, 255, 0.85);
  --bg-dark-elevated: rgba(241, 245, 249, 0.9);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-glow: rgba(139, 92, 246, 0.4);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;

  --glass-shadow: 0 15px 30px rgba(0, 0, 0, 0.06);
}

/* --------------------------------------------------------------------------
   2. Reset & General Styles
   -------------------------------------------------------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   0. Ultra-Modern Custom Scrollbar & Layout Gutter
   -------------------------------------------------------------------------- */
html {
  scroll-behavior: smooth;
  font-size: 16px;
  scrollbar-width: thin;
  scrollbar-color: rgba(139, 92, 246, 0.35) rgba(11, 15, 25, 0.6);
  scrollbar-gutter: stable;
}

/* Custom Webkit Scrollbars (Chrome, Safari, Edge) */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}

::-webkit-scrollbar-track {
  background: rgba(11, 15, 25, 0.6);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: rgba(139, 92, 246, 0.35);
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(139, 92, 246, 0.7);
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

::-webkit-scrollbar-corner {
  background: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* Ambient Glow Animations */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.25;
}

.glow-1 {
  width: 500px;
  height: 500px;
  top: -100px;
  left: -100px;
  background: var(--color-pwa);
  animation: float-glow 12s infinite alternate ease-in-out;
}

.glow-2 {
  width: 600px;
  height: 600px;
  top: 40%;
  right: -150px;
  background: var(--color-spa);
  animation: float-glow 15s infinite alternate-reverse ease-in-out;
}

.glow-3 {
  width: 450px;
  height: 450px;
  bottom: 5%;
  left: 15%;
  background: var(--color-jamstack);
  animation: float-glow 10s infinite alternate ease-in-out;
}

@keyframes float-glow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 60px) scale(1.15); }
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.max-w-4xl {
  max-width: 890px;
}

/* Glassmorphism Card Base */
.glass-card {
  background: var(--bg-dark-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: var(--glass-shadow);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.hover-glow:hover {
  transform: translateY(-6px);
}

/* --------------------------------------------------------------------------
   3. Navigation Bar (2-Row Layout: Logo Top, Menu Bottom)
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 0.85rem 0;
  transition: background var(--transition-normal), backdrop-filter var(--transition-normal), padding var(--transition-fast);
}

.navbar.scrolled {
  background: rgba(11, 15, 25, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.65rem 0;
}

body.light-theme .navbar.scrolled {
  background: rgba(248, 250, 252, 0.92);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.nav-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--grad-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
}

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

.version-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(139, 92, 246, 0.15);
  color: var(--color-pwa);
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.75rem;
  width: 100%;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

body.light-theme .nav-links {
  border-top-color: rgba(0, 0, 0, 0.06);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  padding: 0.4rem 0.75rem;
  border-radius: 10px;
  position: relative;
}

.nav-item i {
  width: 17px;
  height: 17px;
}

.nav-item:hover, .nav-item.active {
  color: var(--text-main);
  background: rgba(139, 92, 246, 0.12);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 15%;
  width: 70%;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-dark-elevated);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.icon-btn:hover {
  border-color: var(--border-color-glow);
  background: rgba(139, 92, 246, 0.1);
}

.sun-icon { display: none; }
.moon-icon { display: block; }
body.light-theme .sun-icon { display: block; }
body.light-theme .moon-icon { display: none; }

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  align-items: center;
  justify-content: center;
}

/* --------------------------------------------------------------------------
   4. Buttons & UI Elements
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  border-radius: 12px;
  transition: all var(--transition-fast);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.5);
}

.btn-secondary {
  background: var(--bg-dark-elevated);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--border-color-glow);
  background: rgba(139, 92, 246, 0.1);
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--border-color-glow);
  color: var(--text-main);
  background: rgba(139, 92, 246, 0.08);
}

.btn-outline:hover {
  background: rgba(139, 92, 246, 0.2);
  border-color: var(--color-pwa);
}

.glow-effect {
  position: relative;
  overflow: hidden;
}

.glow-effect::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 60%);
  transform: rotate(45deg);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.glow-effect:hover::before {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   5. Hero Section
   -------------------------------------------------------------------------- */
.hero {
  padding: 11.5rem 0 5rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.3);
  padding: 0.4rem 1rem;
  border-radius: 30px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-pwa);
  margin-bottom: 1.5rem;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-spa);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--color-spa);
  animation: pulse-dot 1.5s infinite alternate;
}

@keyframes pulse-dot {
  0% { transform: scale(0.8); opacity: 0.6; }
  100% { transform: scale(1.3); opacity: 1; }
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

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

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

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2.25rem;
  max-width: 95%;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: var(--bg-dark-card);
  padding: 1.2rem 1.75rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  width: fit-content;
}

.stat-card {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 35px;
  background: var(--border-color);
}

/* Hero Visual Card */
.hero-visual {
  position: relative;
}

.tech-cube-wrapper {
  position: relative;
}

.main-card {
  padding: 0;
  overflow: hidden;
  border-color: rgba(139, 92, 246, 0.25);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.card-header-bar {
  background: rgba(15, 23, 42, 0.9);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.bar-title {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.code-preview {
  padding: 1.5rem;
  background: rgba(11, 15, 25, 0.95);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
}

.code-keyword { color: #ec4899; }
.code-var { color: #60a5fa; }
.code-prop { color: #a78bfa; }
.code-str { color: #34d399; }
.code-num { color: #f59e0b; }

/* Floating Badges around hero visual */
.floating-badge {
  position: absolute;
  padding: 0.5rem 1rem;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.85rem;
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  animation: float-badge 6s infinite alternate ease-in-out;
}

.floating-badge i {
  width: 18px;
  height: 18px;
}

.badge-spa {
  top: -20px;
  right: 20px;
  background: rgba(6, 182, 212, 0.2);
  border: 1px solid var(--color-spa);
  color: var(--color-spa);
  animation-delay: 0s;
}

.badge-jamstack {
  bottom: 20px;
  left: -25px;
  background: rgba(236, 72, 153, 0.2);
  border: 1px solid var(--color-jamstack);
  color: var(--color-jamstack);
  animation-delay: 1.5s;
}

.badge-wp {
  top: 40%;
  right: -30px;
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid var(--color-wp);
  color: var(--color-wp);
  animation-delay: 3s;
}

.badge-pwa {
  bottom: -20px;
  right: 40px;
  background: rgba(139, 92, 246, 0.2);
  border: 1px solid var(--color-pwa);
  color: var(--color-pwa);
  animation-delay: 4.5s;
}

@keyframes float-badge {
  0% { transform: translateY(0); }
  100% { transform: translateY(-12px); }
}

/* --------------------------------------------------------------------------
   6. General Section Layouts & Section Headers
   -------------------------------------------------------------------------- */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  margin-bottom: 3.5rem;
}

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-pwa);
  background: rgba(139, 92, 246, 0.12);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  margin-bottom: 0.8rem;
}

.section-tag i {
  width: 14px;
  height: 14px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.8rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   7. Architecture Section & Flow Diagram
   -------------------------------------------------------------------------- */
.arch-diagram-wrapper {
  padding: 2.5rem;
}

.arch-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.arch-step-node {
  background: var(--bg-dark-elevated);
  border: 1px solid var(--border-color);
  padding: 1.5rem 1.25rem;
  border-radius: 16px;
  text-align: center;
  position: relative;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.arch-step-node:hover, .arch-step-node.active {
  border-color: var(--color-pwa);
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(139, 92, 246, 0.2);
}

.node-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: #fff;
}

.bg-wp { background: var(--grad-wp); }
.bg-jamstack { background: var(--grad-alt); }
.bg-spa { background: var(--grad-primary); }
.bg-pwa { background: var(--grad-pwa); }

.node-step-number {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-pwa);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.2rem;
}

.node-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.node-desc {
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.4;
}

.flow-arrow {
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: arrow-bounce 2s infinite ease-in-out;
}

@keyframes arrow-bounce {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(5px); }
}

.arch-detail-box {
  background: rgba(11, 15, 25, 0.7);
  border: 1px solid var(--border-color-glow);
  padding: 1.5rem;
  border-radius: 14px;
}

.detail-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
  color: var(--color-pwa);
}

.detail-header h4 {
  font-size: 1.1rem;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   8. 4 Pillars Deep Dive
   -------------------------------------------------------------------------- */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.pillar-card {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  position: relative;
}

.border-spa:hover { border-color: var(--color-spa); box-shadow: var(--glow-shadow-spa); }
.border-jamstack:hover { border-color: var(--color-jamstack); box-shadow: var(--glow-shadow-jamstack); }
.border-wp:hover { border-color: var(--color-wp); box-shadow: var(--glow-shadow-wp); }
.border-pwa:hover { border-color: var(--color-pwa); box-shadow: var(--glow-shadow-pwa); }

.pillar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.pillar-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.bg-spa-glow { background: var(--grad-primary); }
.bg-jamstack-glow { background: var(--grad-alt); }
.bg-wp-glow { background: var(--grad-wp); }
.bg-pwa-glow { background: var(--grad-pwa); }

.pillar-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.7rem;
  border-radius: 20px;
  background: var(--bg-dark-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.pillar-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.pillar-summary {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.pillar-features {
  list-style: none;
  margin-bottom: 1.75rem;
}

.pillar-features li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-main);
  margin-bottom: 0.6rem;
}

.pillar-features li i {
  width: 18px;
  height: 18px;
  color: var(--color-wp);
  flex-shrink: 0;
}

.pillar-code-snippet {
  margin-top: auto;
  background: rgba(11, 15, 25, 0.9);
  padding: 0.8rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.snippet-tag {
  font-size: 0.68rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pillar-code-snippet code {
  color: var(--color-spa);
}

/* --------------------------------------------------------------------------
   9. Interactive Live Sandbox
   -------------------------------------------------------------------------- */
.sandbox-card {
  padding: 2rem;
}

.sandbox-tabs {
  display: flex;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.sandbox-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-dark-elevated);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.sandbox-tab:hover {
  color: var(--text-main);
  border-color: var(--border-color-glow);
}

.sandbox-tab.active {
  background: var(--grad-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.sandbox-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2rem;
}

.sandbox-controls h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sandbox-controls p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: rgba(11, 15, 25, 0.9);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--color-pwa);
}

.sandbox-display {
  background: rgba(11, 15, 25, 0.95);
  border-radius: 14px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.display-header {
  background: rgba(15, 23, 42, 0.9);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
}

.status-indicator {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  font-weight: 700;
}

.status-indicator.online {
  background: rgba(16, 185, 129, 0.15);
  color: var(--color-wp);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.display-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  height: 100%;
}

.json-code-box {
  background: rgba(0, 0, 0, 0.3);
  padding: 1rem;
  border-radius: 10px;
  max-height: 200px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-spa);
}

.live-card-render {
  background: var(--bg-dark-elevated);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
}

.placeholder-text {
  color: var(--text-dim);
  font-size: 0.88rem;
  text-align: center;
  padding: 1rem 0;
}

/* SPA Demo Box */
.spa-demo-box {
  background: rgba(11, 15, 25, 0.95);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
}

.spa-header {
  background: rgba(15, 23, 42, 0.9);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.browser-controls {
  display: flex;
  gap: 0.4rem;
}

.browser-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.url-bar {
  flex: 1;
  background: rgba(0, 0, 0, 0.4);
  padding: 0.35rem 0.8rem;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.lock-icon {
  width: 14px;
  height: 14px;
  color: var(--color-wp);
}

.refresh-indicator {
  font-size: 0.78rem;
  color: var(--color-pwa);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.refresh-indicator i {
  width: 14px;
  height: 14px;
}

.spa-body {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 260px;
}

.spa-sidebar {
  background: rgba(15, 23, 42, 0.5);
  border-right: 1px solid var(--border-color);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.spa-nav-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: left;
  transition: all var(--transition-fast);
}

.spa-nav-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.spa-nav-btn.active {
  background: rgba(139, 92, 246, 0.2);
  color: var(--color-pwa);
  font-weight: 600;
}

.spa-view {
  padding: 1.75rem;
}

.spa-view h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.spa-view p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.metric-tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.tile {
  background: var(--bg-dark-elevated);
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.tile-val {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-spa);
  font-family: var(--font-mono);
}

/* PWA Tab Grid */
.pwa-demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.pwa-card {
  background: var(--bg-dark-elevated);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.pwa-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(139, 92, 246, 0.15);
  color: var(--color-pwa);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.pwa-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.pwa-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.offline-toggle-wrapper {
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-main);
}

.status-msg {
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: auto;
}

.status-msg.online { color: var(--color-wp); }
.status-msg.offline { color: var(--color-jamstack); }

.text-success { color: var(--color-wp); }

/* --------------------------------------------------------------------------
   10. Performance & Comparison Matrix
   -------------------------------------------------------------------------- */
.comparison-table-wrapper {
  padding: 1rem;
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.comparison-table th, .comparison-table td {
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.col-modern.highlight-col {
  background: rgba(139, 92, 246, 0.06);
  border-left: 1px solid var(--border-color-glow);
  border-right: 1px solid var(--border-color-glow);
}

.feature-label {
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.feature-label i {
  width: 18px;
  height: 18px;
  color: var(--color-pwa);
}

.col-traditional {
  color: var(--text-muted);
}

.badge-success {
  color: var(--color-wp);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   11. FAQ Accordion
   -------------------------------------------------------------------------- */
.accordion-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.accordion-item {
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  padding: 1.4rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  text-align: left;
}

.accordion-icon {
  transition: transform var(--transition-fast);
  color: var(--color-pwa);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
  padding: 0 1.75rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.accordion-item.active .accordion-body {
  padding-bottom: 1.5rem;
}

.accordion-body code {
  background: rgba(139, 92, 246, 0.15);
  color: var(--color-pwa);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

/* --------------------------------------------------------------------------
   12. CTA Banner & Footer
   -------------------------------------------------------------------------- */
.cta-banner {
  padding: 4rem 0 6rem;
}

.cta-card {
  padding: 4rem 2rem;
  border-color: var(--border-color-glow);
}

.glow-box {
  box-shadow: 0 0 50px rgba(139, 92, 246, 0.2);
}

.cta-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.cta-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

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

.footer {
  background: rgba(11, 15, 25, 0.95);
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-brand p {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 0.3rem;
}

/* Toast Notification Styles */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color-glow);
  padding: 1rem 1.25rem;
  border-radius: 12px;
  color: var(--text-main);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slide-toast 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 0.9rem;
  font-weight: 500;
}

@keyframes slide-toast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* --------------------------------------------------------------------------
   13. Comprehensive Mobile & Responsive Breakpoints (Activated at <= 1024px)
   -------------------------------------------------------------------------- */
/* Responsive Fluid Typography */
.hero-title {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: clamp(1.5rem, 3.8vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.8rem;
}

/* Tablet & Mobile Screens (<= 1024px) */
@media (max-width: 1024px) {
  /* Hide Desktop Horizontal Nav Bar & Show Mobile Hamburger Button */
  .nav-links {
    display: none !important;
  }

  .mobile-menu-btn {
    display: inline-flex !important;
    cursor: pointer;
    z-index: 10001;
  }

  .nav-top-row {
    width: 100%;
  }

  /* Mobile Dropdown Active State */
  .nav-links.mobile-active {
    display: flex !important;
    flex-direction: column;
    width: 100%;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    padding: 1.25rem 1rem;
    border-radius: 16px;
    border: 1px solid var(--border-color-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    margin-top: 0.5rem;
    gap: 0.5rem;
    z-index: 10000;
  }

  .nav-links.mobile-active .nav-item {
    width: 100%;
    justify-content: flex-start;
    padding: 0.75rem 1rem;
    font-size: 1.05rem;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.04);
  }

  /* Stack Grids to 1-Column */
  .hero {
    padding: 7.5rem 0 3.5rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
    font-size: 1rem;
  }

  .hero-cta {
    justify-content: center;
    flex-direction: column;
    width: 100%;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .hero-stats {
    margin: 0 auto;
    width: 100%;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    padding: 1.25rem 1rem;
  }

  .stat-divider {
    width: 80%;
    height: 1px;
  }

  .pillars-grid {
    grid-template-columns: 1fr;
  }

  .arch-flow {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .flow-arrow {
    transform: rotate(90deg);
    margin: 0.5rem 0;
  }

  .sandbox-grid {
    grid-template-columns: 1fr;
  }

  .pwa-demo-grid {
    grid-template-columns: 1fr;
  }

  .spa-body {
    grid-template-columns: 1fr;
  }

  .spa-sidebar {
    flex-direction: row;
    overflow-x: auto;
    padding: 0.5rem;
    white-space: nowrap;
  }

  .metric-tiles {
    grid-template-columns: 1fr;
  }

  .comparison-table-wrapper {
    margin: 0 -0.5rem;
    border-radius: 12px;
  }

  .comparison-table th, .comparison-table td {
    padding: 0.85rem 0.65rem;
    font-size: 0.82rem;
  }

  .sandbox-tabs {
    flex-direction: column;
    gap: 0.5rem;
  }

  .sandbox-tab {
    width: 100%;
    justify-content: center;
  }

  .code-preview, pre code {
    font-size: 0.78rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
  }

  .cta-card {
    padding: 2.5rem 1.25rem;
  }

  .cta-title {
    font-size: 1.5rem;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 1.25rem;
  }

  .footer-links {
    flex-direction: column;
    gap: 0.6rem !important;
  }

  .floating-badge {
    display: none; /* Hide floating absolute badges on touch/mobile to prevent width overflow */
  }
}

/* Extra Small Mobile Devices (480px) */
@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .btn-lg {
    padding: 0.75rem 1.2rem;
    font-size: 0.9rem;
  }

  .pillar-card {
    padding: 1.35rem 1rem;
  }

  .sandbox-card {
    padding: 1.25rem 0.75rem;
  }

  .arch-diagram-wrapper {
    padding: 1.25rem 0.75rem;
  }
}