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

/* ----------------------------------------------------
   Core Design System Tokens & Custom Properties
------------------------------------------------------- */
:root {
  /* Colors - Light Theme Primary */
  --canvas-bg: #F8FAFC;
  --card-bg: #FFFFFF;
  --text-primary: #0F172A;
  --text-secondary: #64748B;
  --accent-blue: #1D63FF;
  --accent-red: #BC001F;
  --accent-cyan: #0EA5E9;
  --border-color: #E2E8F0;
  --border-hover: #CBD5E1;
  --shadow-primary: rgba(15, 23, 42, 0.04);
  --shadow-glow: rgba(29, 99, 255, 0.02);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(226, 232, 240, 0.6);
  --active-indicator: #1D63FF;
}

html.dark {
  /* Colors - Dark Theme Alternative */
  --canvas-bg: #051424;
  --card-bg: #122131;
  --text-primary: #D4E4FA;
  --text-secondary: #94A3B8;
  --accent-blue: #5B8AFF;
  --accent-red: #EF4444;
  --accent-cyan: #7BD0FF;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.16);
  --shadow-primary: rgba(0, 15, 33, 0.4);
  --shadow-glow: rgba(91, 138, 255, 0.12);
  --glass-bg: rgba(5, 20, 36, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --active-indicator: #7BD0FF;
}

/* ----------------------------------------------------
   Base Document Definitions
------------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--canvas-bg);
  color: var(--text-primary);
  font-family: 'Poppins', sans-serif;
  overflow-x: hidden;
  transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              color 0.3s ease,
              border-color 0.3s ease;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ----------------------------------------------------
   Typography Architecture & Overrides
------------------------------------------------------- */
.font-grotesk {
  font-family: 'Space Grotesk', sans-serif;
}

.font-poppins {
  font-family: 'Poppins', sans-serif;
}

.font-mono {
  font-family: 'Space Mono', monospace;
}

h1, h2, h3, h4, .headline-title {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.label-mono {
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-blue);
}

/* ----------------------------------------------------
   Layout & Container Utilities
------------------------------------------------------- */
.section-padding {
  padding-top: clamp(3.5rem, 8vw, 7.5rem);
  padding-bottom: clamp(3.5rem, 8vw, 7.5rem);
}

.grid-background {
  position: relative;
}

.grid-background::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.25;
  background-image: 
    linear-gradient(to right, var(--border-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-color) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

html.dark .grid-background::before {
  opacity: 0.15;
}

/* ----------------------------------------------------
   Interactive & UI Components
------------------------------------------------------- */
.btn-primary {
  background-color: var(--accent-blue);
  color: #FFFFFF !important;
  font-family: 'Space Mono', monospace;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover {
  background-color: var(--accent-blue);
  box-shadow: 0 4px 12px var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  border: 1px solid var(--border-color);
  background-color: transparent;
  color: var(--text-primary);
  font-family: 'Space Mono', monospace;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 8px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-secondary:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background-color: rgba(29, 99, 255, 0.02);
  transform: translateY(-1px);
}

.btn-alert {
  background-color: var(--accent-red);
  color: #FFFFFF !important;
  font-family: 'Space Mono', monospace;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 8px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(188, 0, 31, 0.15);
}

.btn-alert:hover {
  background-color: #A30018;
  box-shadow: 0 6px 16px rgba(188, 0, 31, 0.25);
  transform: translateY(-1px);
}

html.dark .btn-alert:hover {
  background-color: #DC2626;
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.35);
}

/* Glassmorphic Navbar */
.nav-glass {
  background-color: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  transition: background-color 0.4s ease, border-color 0.4s ease, shadow 0.3s ease;
}

/* Premium Asymmetric Card Grid */
.premium-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 4px 20px var(--shadow-primary);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), 
              border-color 0.3s ease, 
              box-shadow 0.3s ease;
}

.premium-card:hover {
  transform: translateY(-4px) scale(1.01);
  border-color: var(--accent-blue);
  box-shadow: 0 8px 30px var(--shadow-glow), 0 0 1px var(--accent-blue);
}

/* Interactive Timeline */
.timeline-dot {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-step:hover .timeline-dot {
  border-color: var(--accent-blue);
  box-shadow: 0 0 12px var(--shadow-glow);
  transform: scale(1.05);
}

.timeline-connector {
  background: repeating-linear-gradient(
    to right,
    var(--border-color),
    var(--border-color) 4px,
    transparent 4px,
    transparent 8px
  );
}

/* Custom Morphing Theme Toggle */
.theme-toggle-btn {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background-color: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background-color: rgba(29, 99, 255, 0.05);
}

.theme-toggle-icon {
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1), 
              opacity 0.3s ease;
}

html.dark .theme-toggle-icon {
  transform: rotate(360deg);
}

/* ----------------------------------------------------
   Animations & Micro-interactions
------------------------------------------------------- */
@keyframes pulseGlow {
  0%, 100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(1.05);
  }
}

.pulse-glow {
  animation: pulseGlow 4s infinite ease-in-out;
}

@keyframes spinSlow {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.spin-slow {
  animation: spinSlow 30s linear infinite;
}

.spin-slow-reverse {
  animation: spinSlow 20s linear infinite reverse;
}

/* Responsive View Transitions */
@media (max-width: 767px) {
  .mobile-menu-open {
    overflow: hidden;
  }
  .mobile-menu-container {
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .mobile-menu-container.active {
    transform: translateX(0);
  }
}