:root {
  --bg-color: #f0f0f0;
  --text-color: #090a0f;
  --text-muted: #333333;
  --primary-color: #ff6b6b; /* Electric coral-pink */
  --secondary-color: #a3e635; /* Laser lime */
  --card-bg: #ffffff;
  --border-color: #090a0f;
  --shadow-color: #090a0f;
  --shadow-hover: #ff6b6b;
  --navbar-bg: rgba(240, 240, 240, 0.95);
  --border-width: 2px;
  --transition: all 0.2s ease-out;
  --font-mono: "Courier New", Courier, monospace;
}

[data-theme="dark"] {
  --bg-color: #090a0f;
  --text-color: #ffffff;
  --text-muted: #cccccc;
  --primary-color: #ff6b6b;
  --secondary-color: #a3e635;
  --card-bg: #12141c;
  --border-color: #ffffff;
  --shadow-color: #ff6b6b;
  --shadow-hover: #a3e635;
  --navbar-bg: rgba(9, 10, 15, 0.95);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

h1, h2, h3, h4, .font-mono {
  font-family: var(--font-mono);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
}

a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: bold;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Marquee */
.marquee-container {
  background: var(--primary-color);
  color: #000;
  padding: 8px 0;
  overflow: hidden;
  border-bottom: var(--border-width) solid var(--border-color);
  position: relative;
  z-index: 1001;
}

.marquee-content {
  display: flex;
  white-space: nowrap;
  animation: marquee 15s linear infinite;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: 1.1rem;
}

.marquee-content span {
  padding: 0 2vw;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Header */
.neo-header {
  position: sticky;
  top: 0;
  width: 100%;
  background: var(--navbar-bg);
  backdrop-filter: blur(5px);
  z-index: 1000;
  border-bottom: var(--border-width) solid var(--border-color);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 900;
  font-family: var(--font-mono);
  background: var(--text-color);
  color: var(--bg-color);
  padding: 4px 12px;
  border: var(--border-width) solid var(--border-color);
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-links a {
  padding: 4px 8px;
  border: 2px solid transparent;
  transition: var(--transition);
}

.nav-links a:hover {
  border-color: var(--primary-color);
  background: var(--primary-color);
  color: #000;
}

/* Theme Toggle */
.theme-toggle {
  background: var(--card-bg);
  border: var(--border-width) solid var(--border-color);
  box-shadow: 3px 3px 0px var(--shadow-color);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-color);
  transition: var(--transition);
  border-radius: 0; /* Brutalist sharp edges */
}

.theme-toggle:active {
  transform: translate(3px, 3px);
  box-shadow: 0px 0px 0px var(--shadow-color);
}

[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }
[data-theme="light"] .sun-icon { display: block; }
[data-theme="light"] .moon-icon { display: none; }

/* Buttons */
.neo-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  font-size: 1.1rem;
  font-family: var(--font-mono);
  font-weight: 800;
  cursor: pointer;
  background: var(--card-bg);
  color: var(--text-color);
  border: var(--border-width) solid var(--border-color);
  box-shadow: 5px 5px 0px var(--shadow-color);
  transition: transform 0.1s, box-shadow 0.1s;
  text-transform: uppercase;
}

.neo-btn-primary {
  background: var(--primary-color);
  color: #000 !important;
  border-color: var(--border-color);
  box-shadow: 5px 5px 0px var(--border-color);
}
[data-theme="dark"] .neo-btn-primary {
  box-shadow: 5px 5px 0px var(--secondary-color);
}

.neo-btn-secondary {
  background: var(--bg-color);
}

.neo-btn:active {
  transform: translate(5px, 5px);
  box-shadow: 0px 0px 0px transparent !important;
}

/* Sections */
.section {
  padding: 100px 0;
  position: relative;
}

/* Hero Section */
.hero {
  text-align: left;
  padding: 120px 0;
  position: relative;
}

.brutalist-title {
  font-size: clamp(3rem, 6vw, 5rem);
  line-height: 1.1;
  margin-bottom: 24px;
  text-transform: uppercase;
  border-left: 12px solid var(--primary-color);
  padding-left: 20px;
}

.hero p {
  font-size: 1.25rem;
  font-family: var(--font-mono);
  max-width: 800px;
  margin-bottom: 48px;
  border: var(--border-width) solid var(--border-color);
  padding: 16px;
  background: var(--card-bg);
  box-shadow: 4px 4px 0px var(--secondary-color);
}

.hero-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

/* Neo Card */
.neo-card {
  background: var(--card-bg);
  border: var(--border-width) solid var(--border-color);
  padding: 32px;
  box-shadow: 6px 6px 0px var(--shadow-color);
  transition: var(--transition);
  position: relative;
}

.neo-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0px var(--shadow-hover);
  border-color: var(--secondary-color);
}

.neo-card h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
  border-bottom: var(--border-width) solid var(--border-color);
  padding-bottom: 8px;
  display: inline-block;
}

/* Cluster Matrix */
.cluster-matrix .neo-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cluster-badge {
  align-self: flex-start;
  background: var(--text-color);
  color: var(--bg-color);
  padding: 4px 8px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: bold;
}

.data-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed var(--text-muted);
  padding-bottom: 4px;
  font-family: var(--font-mono);
}

.data-value {
  color: var(--secondary-color);
  font-weight: bold;
}
[data-theme="light"] .data-value {
  color: var(--primary-color);
}

/* Bandwidth Sandbox */
.sandbox-container {
  border: var(--border-width) solid var(--border-color);
  background: var(--card-bg);
  box-shadow: 8px 8px 0px var(--primary-color);
  padding: 32px;
  margin: 40px 0;
  position: relative;
  overflow: hidden;
}

.sandbox-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: var(--border-width) solid var(--border-color);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.sandbox-controls {
  margin-bottom: 24px;
}

.neo-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 12px;
  background: var(--bg-color);
  border: var(--border-width) solid var(--border-color);
  outline: none;
}

.neo-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  background: var(--secondary-color);
  border: var(--border-width) solid var(--border-color);
  cursor: pointer;
}

.speed-meter {
  height: 60px;
  background: var(--bg-color);
  border: var(--border-width) solid var(--border-color);
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 0 4px;
  gap: 4px;
}

.speed-bar {
  flex: 1;
  background: var(--primary-color);
  transition: height 0.3s ease;
  min-height: 5%;
}

/* Pricing Matrix */
.pricing-card {
  text-align: center;
  padding: 40px 24px;
  display: flex;
  flex-direction: column;
}

.pricing-card .price {
  font-size: 3.5rem;
  font-family: var(--font-mono);
  font-weight: 900;
  margin: 20px 0;
  background: var(--text-color);
  color: var(--bg-color);
  display: inline-block;
  padding: 0 16px;
  transform: skew(-5deg);
}

.pricing-features {
  list-style: none;
  margin: 24px 0;
  text-align: left;
  flex-grow: 1;
}

.pricing-features li {
  padding: 12px 0;
  border-bottom: 2px solid var(--border-color);
  font-family: var(--font-mono);
  font-weight: bold;
}

/* Canvas Background */
#particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: auto; /* Allow hover */
}

/* Footer */
footer {
  border-top: var(--border-width) solid var(--border-color);
  background: var(--card-bg);
  padding: 60px 0 20px;
  margin-top: 80px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 48px;
}

.footer-section h4 {
  background: var(--text-color);
  color: var(--bg-color);
  display: inline-block;
  padding: 4px 8px;
  margin-bottom: 24px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a:hover {
  color: var(--primary-color);
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

@media (max-width: 768px) {
  .brutalist-title {
    font-size: 2.5rem;
  }
  .nav-links {
    display: none;
  }
  .hero-buttons {
    flex-direction: column;
  }
  .neo-btn {
    width: 100%;
  }
}