/* ============================================================
   eenk Documentation Site
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Syne:wght@700;800&display=swap');

/* ── Reset & Base ───────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-fg);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--color-accent-dark);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 1.1;
  scroll-margin-top: calc(var(--nav-height, 64px) + 1.5rem);
}

h1 {
  font-size: clamp(2rem, 3vw, 3.5rem);
  display: inline-block;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  display: inline-block;
  background: var(--color-fg);
  color: var(--color-bg);
  padding: 0.1em 0.3em;
  margin: 2rem 0 1rem;
}

h3 {
  font-size: 1.1rem;
  border-bottom: var(--border);
  padding-bottom: 0.4rem;
  margin: 1.5rem 0 0.75rem;
}

h4 {
  font-size: 1rem;
  margin: 1.25rem 0 0.5rem;
}

/* ── Heading Anchor Links (Wikipedia-style) ─────────────────── */
.heading-anchor-group {
  position: relative;
}

.heading-anchor-group:target .heading-text {
  animation: heading-target-pulse 1.2s ease-out;
}

@keyframes heading-target-pulse {
  0%, 25% {
    color: var(--color-accent);
  }
  100% {
    color: inherit;
  }
}

.heading-anchor {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 0.35em;
  color: var(--color-gray);
  text-decoration: none;
  opacity: 0;
  vertical-align: middle;
  transition: opacity 0.15s ease-in-out, transform 0.15s ease-in-out, color 0.15s ease-in-out;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}

.heading-anchor-icon {
  width: 0.68em;
  height: 0.68em;
  fill: currentColor;
  display: block;
}

.heading-anchor:hover {
  color: var(--color-accent);
  transform: scale(1.2);
  text-decoration: none;
}

.heading-anchor:focus,
.heading-anchor:focus-visible {
  opacity: 1;
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.heading-anchor-group:hover .heading-anchor {
  opacity: 1;
}

/* Contextual color overrides per heading level */
h1 .heading-anchor {
  color: var(--color-gray);
}

h1 .heading-anchor:hover {
  color: var(--color-accent-dark);
}

h2 .heading-anchor {
  color: var(--color-accent);
}

h2 .heading-anchor:hover {
  color: #FFFFFF;
}

/* Touch devices support (reveal subtly when hover is unavailable) */
@media (hover: none) {
  .heading-anchor {
    opacity: 0.45;
  }
}

/* ── Anchor Copy Toast Notification ────────────────────────── */
.anchor-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--color-fg);
  color: var(--color-bg);
  border: var(--border);
  box-shadow: var(--shadow-hard);
  padding: 0.6rem 1rem;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 999;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.anchor-toast.show {
  opacity: 1;
  transform: translateY(0);
}

.anchor-toast .toast-icon {
  color: var(--color-accent);
  font-weight: 900;
}

@media (max-width: 700px) {
  .anchor-toast {
    bottom: 1.25rem;
    right: 1.25rem;
    left: 1.25rem;
    justify-content: center;
  }
}

p {
  margin-bottom: 1rem;
}

ul,
ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.25rem;
  list-style-type: square;
}

code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.875em;
  background: var(--color-light);
  border: 1px solid #DDD;
  padding: 0.1em 0.4em;
}

pre {
  background: var(--color-light);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  border: var(--border);
  box-shadow: var(--shadow-hard);
  margin: 1.5rem 0;
  font-size: 0.875rem;
  line-height: 1.5;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

blockquote {
  border-left: 4px solid var(--color-accent);
  padding-left: 1rem;
  color: var(--color-gray);
  margin: 1rem 0;
  font-style: italic;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  overflow: auto;
  display: block;
}

th {
  background: var(--color-fg);
  color: var(--color-bg);
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  padding: 0.6rem 0.85rem;
  text-align: left;
  border: var(--border);
}

td {
  padding: 0.55rem 0.85rem;
  border: 1px solid #DDD;
}

tr:nth-child(even) td {
  background: var(--color-light);
}

hr {
  border: none;
  border-top: var(--border);
  margin: 2.5rem 0;
}

.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 1.2em;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
  vertical-align: middle;
}

/* ── Navigation Bar ─────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--color-fg);
  display: flex;
  align-items: center;
  padding: 0 var(--content-pad);
  gap: 0;
}

.site-nav li {
  margin: 0;
}

.site-nav .nav-logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-bg);
  text-decoration: none;
  letter-spacing: -0.03em;
  margin-right: 1rem;
  flex-shrink: 0;
}

.site-nav .nav-logo span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: stretch;
  height: 100%;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 0;
  flex: 1;
}

.nav-links li {
  display: flex;
}

.nav-links a {
  display: flex;
  align-items: center;
  padding: 0 1.25rem;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  transition: background 0.1s, color 0.1s;
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #FFF;
}

.nav-links a.active {
  background: var(--color-accent);
  color: #FFF;
  border-right-color: var(--color-accent-dark);
}

.nav-github {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: rgba(255, 255, 255, 0.8) !important;
  text-decoration: none;
  font-size: 0.8rem;
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: border-color 0.1s, color 0.1s;
}

.nav-github:hover {
  border-color: #FFF;
  color: #FFF !important;
}

.nav-github svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* ── Page Layout ────────────────────────────────────────────── */
.page-content {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--content-pad);
}

/* ── Hero Section ───────────────────────────────────────────── */
.hero {
  background-image: var(--dither-bg);
  background-size: var(--dither-size);
  image-rendering: pixelated;
  border-bottom: var(--border);
  padding: 5rem var(--content-pad) 4rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
}

.hero h1 {
  background: var(--color-bg);
  color: var(--color-fg);
  font-size: clamp(2.5rem, 7vw, 5rem);
  box-shadow: var(--shadow-hard);
  margin-bottom: 1.25rem;
  text-transform: none;
  padding: 0 0.2em;
}

.hero .tagline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  /* color: rgba(255, 255, 255, 0.92); */
  color: rgba(0, 0, 0, 1);
  padding: 0.4rem 0.8rem;
  max-width: 560px;
  margin-bottom: 2rem;
  line-height: 1.5;
  font-weight: 500;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.4rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: var(--border);
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
  box-shadow: var(--shadow-hard);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #FFF;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: #FFF;
}

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

.btn-secondary:hover {
  background: var(--color-light);
}

.btn:not(:disabled):active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

/* ── Cards / Panels ─────────────────────────────────────────── */
.card {
  background: var(--color-bg);
  border: var(--border);
  box-shadow: var(--shadow-hard);
  padding: 1.5rem;
}

.card-dither {
  background-image: var(--dither-bg);
  background-size: var(--dither-size);
  image-rendering: pixelated;
  border: var(--border);
  box-shadow: var(--shadow-hard);
  padding: 1.5rem;
}

/* ── Features Grid ──────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature-card {
  background: var(--color-bg);
  border: var(--border);
  box-shadow: var(--shadow-hard);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feature-card .feature-icon {
  font-size: 2rem;
  line-height: 1;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: none;
  color: var(--color-bg);
  background: var(--color-fg);
  margin: -1.5rem -1.5rem 0 -1.5rem;
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1em;
}

.feature-card p {
  font-size: 0.9rem;
  color: #444;
  margin: 0;
}

/* ── Device Gallery ─────────────────────────────────────────── */
.device-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.device-card {
  border: var(--border);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.device-card .device-img {
  aspect-ratio: 3/4;
  background: var(--color-light);
  background-image: var(--dither-bg);
  background-size: var(--dither-size);
  image-rendering: pixelated;
  display: flex;
  align-items: center;
  justify-content: center;
}

.device-card .device-img model-viewer {
  width: 100%;
  height: 100%;
  object-fit: cover;
  --poster-color: transparent;
}

.device-card .device-img img {
  aspect-ratio: 3/4;
  object-fit: contain;
}

.device-card .device-label {
  background: var(--color-fg);
  color: var(--color-bg);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.5rem 1rem;
  border-top: var(--border);
}

/* ── Warning Banner ─────────────────────────────────────────── */
.critical-warning {
  background: var(--color-accent-light);
  border: var(--border-accent);
  box-shadow: var(--shadow-hard-accent);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.critical-warning .warning-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.critical-warning .warning-title .warning-icon {
  font-size: 1.25rem;
}

/* ── Step List (Installation) ───────────────────────────────── */
.step-list {
  list-style: none;
  padding: 0;
  counter-reset: steps;
}

.step-list li {
  counter-increment: steps;
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #EEE;
}

.step-list li:last-child {
  border-bottom: none;
}

.step-list li::before {
  content: counter(steps);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  background: var(--color-fg);
  color: var(--color-bg);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 800;
  border: var(--border);
  box-shadow: var(--shadow-hard-sm);
  margin-top: 0.1rem;
}

/* ── Band (alternating full-width content sections) ─────────── */
.band {
  border-top: var(--border);
  border-bottom: var(--border);
  padding: 4rem var(--content-pad);
  margin: 0;
}

.band-dither {
  background-image: var(--dither-bg);
  background-size: var(--dither-size);
  image-rendering: pixelated;
}

.band-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-fg);
  color: rgba(255, 255, 255, 0.6);
  height: var(--nav-height);
  padding: 0 var(--content-pad);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer a {
  color: var(--color-accent);
}

.site-footer strong {
  color: #FFF;
  font-family: var(--font-heading);
}

/* ── External Module Wrapper Page ───────────────────────────── */
body.is-module {
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

body.is-module #main-content {
  flex: 1;
}

.module-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 700px) {
  :root {
    --content-pad: 1rem;
  }

  .site-nav {
    flex-wrap: wrap;
    height: auto;
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }

  .site-footer {
    gap: 0;
    align-content: center;
  }

  .nav-links {
    overflow-x: auto;
    width: 100%;
    scrollbar-width: thin;
  }

  .nav-links a {
    padding: 0.5rem 0.85rem;
    font-size: 0.78rem;
  }

  .device-gallery {
    grid-template-columns: 1fr;
  }

  .device-card {
    display: flex;
    flex-direction: row;
    height: 60vw;
  }

  .device-card .device-label {
    flex-grow: 1;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 3rem 1rem 2.5rem;
  }
}