/* Root theme */
:root {
  --bg: #030405;
  --bg-elevated: #0b0d10;
  --bg-deep: #050609;
  --text: #e5e8ef;
  --muted: #9aa1ad;
  --accent: #5ad1ff;
  --accent-2: #7aa7ff;
  --soft-border: rgba(255, 255, 255, 0.06);
  --panel: rgba(255, 255, 255, 0.03);
  --glass: rgba(6, 8, 11, 0.76);
  --grid: rgba(255, 255, 255, 0.025);
  --glow: rgba(90, 209, 255, 0.25);
  /* aliases for background helpers */
  --bg-main: var(--bg);
  --bg-alt: var(--bg-deep);
  --fg: var(--text);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 20%, #071521, var(--bg-main) 55%, #000000 100%);
  font-family: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
  line-height: 1.7;
  letter-spacing: 0.012em;
  position: relative;
  -webkit-overflow-scrolling: touch;
}

/* Background images removed — assets not in repo, and fixed pseudo-elements
   block touch scrolling on some mobile browsers */

/* Grid overlay removed — fixed animated pseudo-elements break iOS touch scroll */

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

header,
main,
footer,
#landing-overlay {
  position: relative;
  z-index: 1;
}

body.overlay-locked {
  overflow: hidden;
}

.hero {
  border-bottom: 1px solid var(--soft-border);
  padding: 4rem 1.5rem 2.5rem;
  background: linear-gradient(120deg, rgba(90, 209, 255, 0.12), rgba(122, 167, 255, 0.08));
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 760px);
  gap: 1rem;
}

h1 {
  font-family: "Rajdhani", "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
  font-size: clamp(2.4rem, 3vw + 1rem, 3.4rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 0.75rem;
  color: var(--accent);
  text-shadow: 0 0 18px rgba(90, 209, 255, 0.35);
}

.hero-subhead {
  color: var(--muted);
  font-size: 1.08rem;
  margin: 0;
  max-width: 720px;
}

#page-content {
  flex: 1;
}

.content-wrapper {
  max-width: 1300px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.cli-section {
  position: relative;
  padding: 5rem 0;
  isolation: isolate;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease, filter 0.6s ease;
}

.cli-section::before {
  content: "";
  position: absolute;
  inset: 8% 3%;
  background: linear-gradient(145deg, rgba(90, 209, 255, 0.12), rgba(122, 167, 255, 0.07)),
    var(--section-image, linear-gradient(135deg, #0b0d12 0%, #06070c 50%, #050509 100%));
  background-size: cover;
  background-position: center;
  border-radius: 22px;
  border: 1px solid var(--soft-border);
  opacity: 0.7;
  filter: grayscale(0.2) contrast(1.05);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  z-index: 0;
}

.cli-section.is-hidden {
  opacity: 0;
  transform: translateY(18px) scale(0.995);
  filter: blur(1px);
}

.cli-section.visible {
  opacity: 1;
  transform: translateY(0);
  filter: none;
}

.section-surface {
  position: relative;
  z-index: 1;
  max-width: 720px;
  background: var(--glass);
  border: 1px solid var(--soft-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45), 0 0 40px var(--glow);
  border-radius: 18px;
  padding: 2.5rem 2.25rem;
  backdrop-filter: blur(6px) saturate(1.05);
}

.cli-section:nth-of-type(odd) .section-surface {
  margin-right: auto;
}

.cli-section:nth-of-type(even) .section-surface {
  margin-left: auto;
}

.section-inner {
  max-width: 640px;
}

h2 {
  font-family: "Rajdhani", "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 1.15rem;
  margin: 0 0 0.35rem;
}

p {
  margin: 0 0 1.1rem;
  font-size: 1.02rem;
  color: #d9dde6;
}

.section-body {
  opacity: 1;
  transition: opacity 0.5s ease;
}

.section-body.dimmed {
  opacity: 0.3;
}

.chart-placeholder {
  margin: 1.25rem 0;
}

.chart-box {
  height: 220px;
  border: 1px dashed var(--muted);
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border-radius: 12px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.chart-label {
  font-family: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

figcaption {
  margin-top: 0.6rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.chart-figure {
  margin: 1.75rem 0;
}

.chart-figure canvas {
  width: 100%;
  max-width: 100%;
  height: 260px;
  display: block;
}

.chart-figure figcaption {
  margin-top: 0.6rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.works-list {
  padding-left: 1.1rem;
  margin: 0;
  color: var(--muted);
}

.works-list li {
  margin-bottom: 0.65rem;
}

footer {
  border-top: 1px solid var(--soft-border);
  padding: 1.75rem 1.5rem 2.4rem;
  background: var(--bg);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footnote {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

/* Overlay */
#landing-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, #0e1016, #020304 80%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: opacity 0.6s ease;
}

.no-js #landing-overlay {
  display: none;
}

.overlay-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
  text-align: center;
}

#hex-hero {
  width: min(260px, 70vw);
  aspect-ratio: 1 / 1;
  position: relative;
}

#hex-svg {
  width: 100%;
  height: 100%;
  display: block;
  filter: drop-shadow(0 0 12px rgba(90, 209, 255, 0.36));
}

#lottie-container {
  position: absolute;
  inset: 12% 12%;
  pointer-events: none;
}

#overlay-prompt-scroll,
#overlay-prompt-interactive .cli-line {
  color: var(--accent);
  font-family: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
  letter-spacing: 0.08em;
  animation: pulse 1.8s ease-in-out infinite;
}

.overlay-hint {
  font-size: 0.85rem;
  opacity: 0.75;
}

.overlay-mode {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
}

.cli-line,
.cli-input,
.cli-prefix {
  font-family: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
  color: var(--text);
}

.cli-input {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-elevated);
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--soft-border);
  border-radius: 12px;
  min-width: 200px;
  justify-content: center;
  box-shadow: 0 0 22px rgba(0, 0, 0, 0.45), 0 0 18px rgba(90, 209, 255, 0.25);
}

#overlay-input {
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-family: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.95rem;
  width: 9rem;
  caret-color: var(--accent);
}

.cli-cursor {
  display: inline-block;
  width: 0.6ch;
  margin-left: 0.05em;
  background-color: var(--accent);
  animation: blink 1s steps(1, start) infinite;
}

.st-char {
  color: transparent;
}
.st-char.st-vis {
  color: inherit;
}
.scroll-cursor {
  display: inline;
  color: var(--accent);
  animation: blink 1s steps(1, start) infinite;
  font-weight: normal;
}

/* Hex rotation */
.spin-slow {
  animation: spin 16s linear infinite;
  transform-origin: 50% 50%;
}

/* Responsive */
@media (max-width: 1024px) {
  .cli-section::before {
    inset: 6% 4%;
  }

  .section-surface {
    max-width: 640px;
  }
}

@media (max-width: 780px) {
  .content-wrapper {
    padding: 2.5rem 1.25rem 3rem;
  }

  .cli-section {
    padding: 3.75rem 0;
  }

  .cli-section::before {
    inset: 5% 2%;
  }

  .section-surface {
    max-width: 100%;
    margin: 0 auto;
    padding: 2rem 1.5rem;
  }

  .hero-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: clamp(2rem, 4vw + 1rem, 2.4rem);
  }

  p {
    font-size: 1rem;
  }

  #hex-hero {
    width: min(220px, 75vw);
  }
}

@media (max-width: 600px) {
  header.hero {
    padding-top: 3rem;
  }
}

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

@keyframes pulse {
  0% {
    opacity: 0.55;
    color: var(--accent);
  }
  50% {
    opacity: 1;
    color: var(--accent-2);
  }
  100% {
    opacity: 0.55;
    color: var(--accent);
  }
}

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

@keyframes bg-drift {
  0%   { background-position: 0 0, 0 0, 0 0; }
  100% { background-position: 40px 20px, -30px 40px, -120px 60px; }
}