:root {
  --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Space Grotesk', monospace;

  /* Cyber Protocol Palette - Light */
  --bg: #f0f4f8;
  --bg-gradient: radial-gradient(circle at 50% 10%, #ffffff 0%, #e2e8f0 100%);
  --text: #0f172a;
  --text-soft: #64748b;
  --accent: #2563eb;
  --accent-glow: rgba(37, 99, 235, 0.4);
  --glass: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(37, 99, 235, 0.2);
  --panel-blur: 20px;
}

body.theme-dark {
  /* Cyber Protocol Palette - Dark */
  --bg: #030712;
  --bg-gradient: radial-gradient(circle at 50% 0%, #0c152a 0%, #030712 100%);
  --text: #f8fafc;
  --text-soft: #94a3b8;
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.6);
  --glass: rgba(13, 17, 30, 0.85);
  --glass-border: rgba(56, 189, 248, 0.3);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.5s cubic-bezier(0.4, 0, 0.2, 1),
    border-color 0.5s ease,
    color 0.5s ease,
    box-shadow 0.5s ease;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  overflow-x: hidden;
  letter-spacing: 0.01em;
}

/* Sci-fi Overlay texture */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.05) 50%),
    linear-gradient(90deg, rgba(255, 0, 0, 0.02), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.02));
  background-size: 100% 4px, 3px 100%;
  z-index: 1000;
  pointer-events: none;
  opacity: 0.1;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: var(--bg-gradient);
  z-index: -1;
}

#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 1;
}

.shell {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  padding-left: 28px;
  padding-right: 28px;
}

/* Header & Nav */
.top {
  padding-top: 40px;
  padding-bottom: 24px;
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.brand-ball {
  width: 32px;
  height: 32px;
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  animation: pulse-glow 3s infinite alternate;
}

@keyframes pulse-glow {
  from {
    transform: scale(1);
    filter: brightness(1);
  }

  to {
    transform: scale(1.1);
    filter: brightness(1.3);
  }
}

.badge {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 6px 16px;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.nav {
  display: flex;
  gap: 12px;
  padding: 6px;
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}

.nav-link {
  flex: 1;
  text-decoration: none;
  text-align: center;
  padding: 14px 6px;
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 0 25px var(--accent-glow);
}

/* Content Layout */
.page {
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding-bottom: 100px;
}

.panel {
  background: var(--glass);
  backdrop-filter: blur(var(--panel-blur));
  border: 1px solid var(--glass-border);
  padding: 40px 18px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

.panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

/* Typography Sci-fi Effects */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.4em;
  margin-bottom: 20px;
  opacity: 0.8;
  display: block;
}

.hero-title {
  margin: 0;
  font-size: clamp(24px, 8.5vw, 40px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--text);
  overflow-wrap: break-word;
  word-break: break-word;
}

.hero-title .blink {
  animation: blink 1s infinite;
  color: var(--accent);
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.lead {
  margin: 32px 0 0;
  font-size: 18px;
  color: var(--text-soft);
  font-weight: 400;
  line-height: 1.7;
}

/* Metrics - Cyber Grid */
.metric-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 48px;
}

.metric {
  padding: 24px;
  background: rgba(0, 0, 0, 0.02);
  border-left: 4px solid var(--accent);
  transition: all 0.4s ease;
}

body.theme-dark .metric {
  background: rgba(255, 255, 255, 0.02);
}

.metric:hover {
  background: var(--accent-glow);
  transform: scale(1.02) translateX(10px);
}

.metric b {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

.metric span {
  font-size: 14px;
  color: var(--text-soft);
  display: block;
}

/* Cards - Sci-fi Modules */
.section-title {
  margin-bottom: 32px;
  font-size: 28px;
  font-family: var(--font-mono);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 12px;
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  padding: 32px;
  background: rgba(0, 0, 0, 0.01);
  border: 1px solid var(--glass-border);
  transition: all 0.4s ease;
}

body.theme-dark .card {
  background: rgba(255, 255, 255, 0.01);
}

.card h3 {
  margin: 0 0 16px;
  font-size: 18px;
  font-family: var(--font-mono);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card p {
  font-size: 15px;
  color: var(--text-soft);
  margin: 0;
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
  transform: translateY(-5px);
}

/* Visualization Art */
.art {
  margin-top: 48px;
  height: 200px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--accent);
  opacity: 0.8;
}

.art svg {
  width: 120px;
  height: 120px;
  filter: drop-shadow(0 0 20px var(--accent));
}

/* Reason Elements */
.reason-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.reason-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  background: rgba(0, 0, 0, 0.02);
  border-right: 2px solid var(--accent);
}

body.theme-dark .reason-item {
  background: rgba(255, 255, 255, 0.02);
}

.reason-item::before {
  content: "//";
  color: var(--accent);
  font-weight: 900;
}

/* Footer & Utils */
.footer {
  text-align: center;
  padding-top: 80px;
  padding-bottom: 80px;
  padding-left: 28px;
  padding-right: 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-soft);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.6;
}

/* Theme switch button removed per request */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  animation: reveal-sci 1.2s cubic-bezier(0.19, 1, 0.22, 1) forwards;
}

@keyframes reveal-sci {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 480px) {
  .hero-title {
    font-size: clamp(40px, 12vw, 56px);
  }

  .shell {
    max-width: 600px;
    padding: 0 24px;
  }

  .panel {
    padding: 56px 36px;
  }
}