/* ============================================
   KODO — Landing Page
   Aesthetic: Decoded Transmission / Retro-CRT
   ============================================ */

:root {
  --bg: #06060e;
  --bg-card: #0b0b18;
  --bg-card-border: #151528;
  --text: #c8c8d4;
  --text-bright: #eeeef4;
  --text-dim: #555570;
  --cyan: #00e8d0;
  --cyan-mid: #00e8d066;
  --cyan-dim: #00e8d018;
  --magenta: #ff2266;
  --magenta-dim: #ff226633;
  --amber: #f0a030;
  --font-display: 'Chakra Petch', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-jp: 'Noto Sans JP', sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---- CRT Effects ---- */

#grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
}

.crt-overlay {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent 0px,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 9997;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    transparent 50%,
    rgba(0, 0, 0, 0.6) 100%
  );
}

.page-content {
  position: relative;
  z-index: 1;
}

/* ---- Navigation ---- */

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.nav-logo {
  color: var(--cyan);
  font-size: 1.1rem;
  letter-spacing: 0.2em;
}

.nav-separator {
  color: var(--text-dim);
}

.nav-status {
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  display: inline-block;
  animation: pulse-dot 2s ease-in-out infinite;
  box-shadow: 0 0 6px var(--cyan);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.nav-right {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text-bright);
}

.nav-link-accent {
  color: var(--cyan);
  border: 1px solid var(--cyan-mid);
  padding: 0.5rem 1.25rem;
}

.nav-link-accent:hover {
  color: var(--bg);
  background: var(--cyan);
}

/* ---- Hero ---- */

.hero {
  max-width: 1000px;
  margin: 0 auto;
  padding: 8vh 2rem 6rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--bg-card-border);
  padding: 0.6rem 1.4rem;
  margin-bottom: 3rem;
  background: var(--bg-card);
}

.badge-dot {
  width: 5px;
  height: 5px;
  background: var(--cyan);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px var(--cyan);
}

/* ---- Glitch Text ---- */

.glitch-container {
  position: relative;
  display: inline-block;
  margin-bottom: 2rem;
  cursor: default;
}

.glitch-text {
  font-family: var(--font-jp);
  font-size: clamp(5rem, 18vw, 12rem);
  font-weight: 900;
  color: var(--text-bright);
  line-height: 1.1;
  letter-spacing: -0.02em;
  position: relative;
  user-select: none;
}

.glitch-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
}

.glitch-r { color: var(--magenta); }
.glitch-g { color: var(--cyan); }
.glitch-b { color: #4444ff; }

/* Glitch active states — toggled by JS */
.glitch-container.glitching .glitch-r {
  opacity: 0.7;
  transform: translate(-3px, 1px);
  clip-path: polygon(0 15%, 100% 15%, 100% 40%, 0 40%);
}
.glitch-container.glitching .glitch-g {
  opacity: 0.7;
  transform: translate(3px, -1px);
  clip-path: polygon(0 55%, 100% 55%, 100% 80%, 0 80%);
}
.glitch-container.glitching .glitch-b {
  opacity: 0.5;
  transform: translate(1px, 2px);
  clip-path: polygon(0 70%, 100% 70%, 100% 95%, 0 95%);
}

.glitch-container.glitching-hard .glitch-r {
  opacity: 0.9;
  transform: translate(-6px, 2px);
  clip-path: polygon(0 10%, 100% 10%, 100% 50%, 0 50%);
}
.glitch-container.glitching-hard .glitch-g {
  opacity: 0.9;
  transform: translate(6px, -2px);
  clip-path: polygon(0 45%, 100% 45%, 100% 85%, 0 85%);
}
.glitch-container.glitching-hard .glitch-b {
  opacity: 0.7;
  transform: translate(-2px, 4px);
  clip-path: polygon(0 60%, 100% 60%, 100% 100%, 0 100%);
}

/* ---- Hero subtitle ---- */

.hero-sub {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.cursor {
  display: inline-block;
  animation: blink 1s step-end infinite;
  color: var(--cyan);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 560px;
  margin: 0 auto 3rem;
}

/* ---- Buttons ---- */

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-main {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 2rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--bg);
  background: var(--cyan);
  border: 1px solid var(--cyan);
  transition: all 0.25s ease;
}

.btn-main:hover {
  background: transparent;
  color: var(--cyan);
  box-shadow:
    0 0 20px var(--cyan-dim),
    inset 0 0 20px var(--cyan-dim);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 0.9rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--text-dim);
  border: 1px solid var(--bg-card-border);
  background: var(--bg-card);
  transition: all 0.25s ease;
}

.btn-ghost:hover {
  color: var(--text-bright);
  border-color: var(--text-dim);
}

/* ---- Features ---- */

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto 6rem;
  padding: 0 2rem;
}

.feature-card {
  padding: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  transition: border-color 0.3s ease;
}

.feature-card:hover {
  border-color: var(--cyan-mid);
}

.feature-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.feature-index {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.1em;
}

.feature-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--bg-card-border), transparent);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.feature-card p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---- Terminal Code Block ---- */

.code-section {
  max-width: 700px;
  margin: 0 auto 6rem;
  padding: 0 2rem;
}

.terminal {
  border: 1px solid var(--bg-card-border);
  background: #08081200;
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--bg-card-border);
  background: var(--bg-card);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg-card-border);
  border: 1px solid #222240;
}

.terminal-dots span:first-child { background: #ff5f5780; border-color: #ff5f57; }
.terminal-dots span:nth-child(2) { background: #febc2e80; border-color: #febc2e; }
.terminal-dots span:last-child { background: #28c84080; border-color: #28c840; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.terminal-body {
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text);
  overflow-x: auto;
}

.terminal-body .cm {
  color: var(--text-dim);
}

/* ---- Footer ---- */

footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem;
  border-top: 1px solid var(--bg-card-border);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--font-jp);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--text-bright);
}

.footer-meaning {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--cyan);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-dim);
  opacity: 0.5;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-social {
  display: flex;
  gap: 1.25rem;
}

.footer-social a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-social a:hover {
  color: var(--cyan);
  opacity: 1;
}

/* ---- Page load animation ---- */

.hero-badge,
.glitch-container,
.hero-sub,
.hero-desc,
.hero-actions {
  opacity: 0;
  transform: translateY(12px);
  animation: fade-up 0.6s ease forwards;
}

.hero-badge { animation-delay: 0.1s; }
.glitch-container { animation-delay: 0.25s; }
.hero-sub { animation-delay: 0.45s; }
.hero-desc { animation-delay: 0.6s; }
.hero-actions { animation-delay: 0.75s; }

@keyframes fade-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.feature-card {
  opacity: 0;
  transform: translateY(16px);
}

.feature-card.visible {
  animation: fade-up 0.5s ease forwards;
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  nav {
    padding: 1.25rem 1.5rem;
  }

  .nav-status {
    display: none;
  }

  .nav-right {
    gap: 1rem;
  }

  .hero {
    padding: 6vh 1.5rem 4rem;
  }

  .features {
    grid-template-columns: 1fr;
    padding: 0 1.5rem;
  }

  .code-section {
    padding: 0 1.5rem;
  }

  .footer-grid {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }

  footer {
    padding: 2rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .nav-link:not(.nav-link-accent) {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-main, .btn-ghost {
    justify-content: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
  }
}