@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Unbounded:wght@300;400;500;600;700;800;900&family=Space+Mono:wght@400;700&display=swap');

:root {
  color-scheme: dark light;
  
  /* Palette definitions using modern color spec */
  --bg-dark: #07060a;
  --bg-light: #f8fafc;
  --text-dark: #fcfcfd;
  --text-light: #0f172a;
  
  --primary-glow: rgba(59, 130, 246, 0.15);
  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-purple: #a855f7;
  --accent-pink: #ec4899;
  
  /* Apply light-dark() native utility */
  --background: light-dark(var(--bg-light), var(--bg-dark));
  --text-primary: light-dark(var(--text-light), var(--text-dark));
  --text-secondary: light-dark(#475569, #94a3b8);
  --text-muted: light-dark(#64748b, #64748b);
  
  --card-bg: light-dark(rgba(255, 255, 255, 0.75), rgba(13, 12, 19, 0.45));
  --card-border: light-dark(rgba(15, 23, 42, 0.08), rgba(255, 255, 255, 0.08));
  --card-border-hover: light-dark(rgba(6, 182, 212, 0.4), rgba(6, 182, 212, 0.4));
  
  --nav-bg: light-dark(rgba(248, 250, 252, 0.85), rgba(7, 6, 10, 0.75));
  
  --scrollbar-thumb: light-dark(#cbd5e1, #1e1b4b);
  --scrollbar-track: light-dark(#f1f5f9, #07060a);
  
  --code-bg: light-dark(#f1f5f9, #11101a);
  --code-border: light-dark(#e2e8f0, #222036);
  
  --font-display: 'Unbounded', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Space Mono', 'Courier New', Courier, monospace;
  
  --transition-speed: 0.3s;
  --transition-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Reset and base configurations */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  height: 100%;
}

body {
  background-color: var(--background);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100%;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* Grid & glow backdrops */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: 
    radial-gradient(circle 800px at var(--mouse-x, 10%) var(--mouse-y, 20%), light-dark(rgba(6, 182, 212, 0.05), rgba(6, 182, 212, 0.12)) 0%, transparent 50%),
    radial-gradient(circle 800px at calc(100% - var(--mouse-x, 90%)) calc(100% - var(--mouse-y, 80%)), light-dark(rgba(236, 72, 153, 0.04), rgba(236, 72, 153, 0.1)) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, light-dark(rgba(168, 85, 247, 0.02), rgba(168, 85, 247, 0.04)) 0%, transparent 60%);
  z-index: -2;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(light-dark(rgba(15, 23, 42, 0.015), rgba(255, 255, 255, 0.015)) 1px, transparent 1px),
    linear-gradient(90deg, light-dark(rgba(15, 23, 42, 0.015), rgba(255, 255, 255, 0.015)) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center;
  z-index: -1;
  pointer-events: none;
  mask-image: radial-gradient(circle at 50% 50%, rgba(0,0,0,1) 40%, rgba(0,0,0,0.1) 95%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, rgba(0,0,0,1) 40%, rgba(0,0,0,0.1) 95%);
}

/* Scrollbar customization */
body {
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  scrollbar-width: thin;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 4px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

p {
  font-weight: 400;
  color: var(--text-secondary);
}

/* Selection highlight */
::selection {
  background-color: rgba(6, 182, 212, 0.25);
  color: inherit;
}

/* Layout */
.layout-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem 1.5rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Sticky Navigation bar */
.nav-header {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  margin: 0 -1.5rem 3rem -1.5rem;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border);
  z-index: 100;
  transition: border-color var(--transition-speed);
}

.nav-header:hover {
  border-color: rgba(6, 182, 212, 0.2);
}

.brand {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-accent {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition-speed) ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-cyan);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--card-border);
  border-radius: 9999px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-speed) ease;
}

.theme-toggle-btn:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.2);
}

/* Hero Section */
.hero {
  text-align: center;
  margin-top: 1rem;
  margin-bottom: 4rem;
  animation: fadeIn 0.8s ease-out;
}

.hero-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.3rem 0.85rem;
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: 9999px;
  color: var(--accent-cyan);
  background-color: rgba(6, 182, 212, 0.04);
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 10px rgba(6, 182, 212, 0.05);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 1.25rem;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text-primary) 40%, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  max-width: 680px;
  margin: 0 auto;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Doors Grid */
.doors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 5rem;
}

.door-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-speed) var(--transition-bounce);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
}

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

.door-card:hover {
  transform: translateY(-6px);
  border-color: var(--card-border-hover);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15), 0 0 30px rgba(6, 182, 212, 0.05);
}

.door-card.marketer:hover::before {
  background: linear-gradient(90deg, transparent, var(--accent-pink), transparent);
}

.door-card.builder:hover::before {
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
}

.door-card.curious:hover::before {
  background: linear-gradient(90deg, transparent, var(--accent-purple), transparent);
}

.door-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
}

.door-card.marketer .door-icon-wrapper {
  color: var(--accent-pink);
  background-color: rgba(236, 72, 153, 0.05);
  border-color: rgba(236, 72, 153, 0.1);
}

.door-card.builder .door-icon-wrapper {
  color: var(--accent-cyan);
  background-color: rgba(6, 182, 212, 0.05);
  border-color: rgba(6, 182, 212, 0.1);
}

.door-card.curious .door-icon-wrapper {
  color: var(--accent-purple);
  background-color: rgba(168, 85, 247, 0.05);
  border-color: rgba(168, 85, 247, 0.1);
}

.door-title {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.door-meta {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.door-card.marketer .door-meta { color: var(--accent-pink); }
.door-card.builder .door-meta { color: var(--accent-cyan); }
.door-card.curious .door-meta { color: var(--accent-purple); }

.door-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  flex-grow: 1;
}

.door-action {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
  margin-top: auto;
}

.arrow-icon {
  transition: transform var(--transition-speed) var(--transition-bounce);
}

.door-card:hover .arrow-icon {
  transform: translateX(4px);
}

/* Premium Terminal Widget */
.terminal-window {
  background: #09080d;
  border: 1px solid var(--code-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.4);
  font-family: var(--font-mono);
}

.terminal-header {
  background: rgba(21, 20, 29, 0.8);
  padding: 0.75rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--code-border);
}

.terminal-dots {
  display: flex;
  gap: 0.45rem;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 9999px;
}
.terminal-dot.red { background: #ef4444; }
.terminal-dot.yellow { background: #eab308; }
.terminal-dot.green { background: #22c55e; }

.terminal-title {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.terminal-body {
  padding: 1.25rem;
  font-size: 0.85rem;
  line-height: 1.5;
  color: #cbd5e1;
}

/* Reusable glow or pulsing status indicator */
.pulse-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 9999px;
  background-color: #22c55e;
  box-shadow: 0 0 8px #22c55e;
  animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 6px rgba(34, 197, 94, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0);
  }
}

/* Footer Section */
.footer {
  margin-top: auto;
  padding-top: 3rem;
  border-top: 1px solid var(--card-border);
  text-align: center;
}

.footer-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1rem;
}

.footer-link {
  text-decoration: none;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-weight: 600;
  transition: color var(--transition-speed) ease;
}

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

/* General keyframes */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive breakdowns */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .nav-header {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    margin-bottom: 2rem;
  }

  .nav-actions {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .doors-grid {
    grid-template-columns: 1fr;
  }
}

/* Premium Card Mouse Hover Glow Effects */
.door-card, .concept-card, .status-panel, .control-panel, .diagram-panel, .details-card, .info-card, .pipeline-panel, .spoke-card {
  position: relative;
  overflow: hidden;
}

.door-card::after, .concept-card::after, .status-panel::after, .control-panel::after, .diagram-panel::after, .details-card::after, .info-card::after, .pipeline-panel::after, .spoke-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(350px circle at var(--card-mouse-x, 50%) var(--card-mouse-y, 50%), light-dark(rgba(6, 182, 212, 0.08), rgba(6, 182, 212, 0.15)), transparent 50%);
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
  border-radius: inherit;
}

.door-card:hover::after, .concept-card:hover::after, .status-panel:hover::after, .control-panel:hover::after, .diagram-panel:hover::after, .details-card:hover::after, .info-card:hover::after, .pipeline-panel:hover::after, .spoke-card:hover::after {
  opacity: 1;
}

/* Make sure inner interactive items are above the hover glow overlay */
.door-card *, .concept-card *, .status-panel *, .control-panel *, .diagram-panel *, .details-card *, .info-card *, .pipeline-panel *, .spoke-card * {
  position: relative;
  z-index: 2;
}


/* Interactive terminal text inputs */
.terminal-input-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
  padding-top: 0.75rem;
}

.terminal-text-input {
  background: transparent !important;
  border: none !important;
  outline: none !important;
  color: var(--text-primary) !important;
  font-family: var(--font-mono) !important;
  font-size: 0.8rem !important;
  flex-grow: 1 !important;
  padding: 0 !important;
  margin: 0 !important;
  box-shadow: none !important;
}