:root {
  --nav-height:    48px;
  --panel-width:   280px;
  --divider-width: 1px;
  --divider-style: dashed;
  --divider-color: var(--netizen-tag);
  --border:        color-mix(in srgb, var(--netizen-background) 70%, var(--netizen-comment));
  --bg-raised:     color-mix(in srgb, var(--netizen-background) 85%, var(--netizen-text));
  --code-bg:       var(--netizen-background);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--netizen-background);
  color: var(--netizen-text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 14px;
}

a { color: var(--netizen-tag); }
a:hover { text-decoration: none; }

/* ── SPLASH ── */
#splash {
  position: relative;
  height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: var(--divider-width) var(--divider-style) var(--divider-color);
}

#demo-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  z-index: 0;
  pointer-events: none;
}

#splash-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
}

#splash-content {
  position: relative;
  z-index: 2;
  max-width: 630px;
  padding: 0 32px 32px 32px;
  /* background: color-mix(in srgb, var(--netizen-background) 72%, transparent); */
  background: var(--netizen-background);
  border-radius: 5px;
  border: 1px dashed var(--divider-color);
}

#splash-content h1 {
  font-family: monospace;
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 400;
  color: var(--netizen-keyword);
  margin: 24px 0 4px;
}

#typewriter::after {
  content: '|';
  animation: tw-blink 1s step-end infinite;
  color: var(--netizen-tag);
  margin-left: 1px;
}

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

#splash-content h2 {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--netizen-comment);
  margin: 0 0 36px;
}

#splash-content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--netizen-text);
  opacity: 0.85;
  margin: 0 0 18px;
}
#splash-content p:last-of-type { margin-bottom: 32px; }

#splash-content code {
  font-family: monospace;
  background: color-mix(in srgb, var(--netizen-background) 55%, transparent);
  color: var(--netizen-keyword);
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 0.9em;
}

.splash-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  border-radius: 5px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s;
  white-space: nowrap;
}
.cta-btn:hover { opacity: 0.85; text-decoration: none; }

.cta-primary {
  background: var(--netizen-keyword);
  color: var(--netizen-background);
}
.cta-secondary {
  background: color-mix(in srgb, var(--netizen-background) 40%, transparent);
  color: var(--netizen-keyword);
  border: 1px solid var(--netizen-keyword);
}

/* ── GETTING STARTED ── */
#getting-started {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 32px 7px 32px;
  border-bottom: var(--divider-width) var(--divider-style) var(--divider-color);
}

#getting-started-content {
  max-width: 620px;
  width: 100%;
}

#getting-started-content h2 {
  font-family: monospace;
  font-size: 22px;
  font-weight: 400;
  color: var(--netizen-keyword);
  margin: 0 0 12px;
}

#getting-started-content p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--netizen-text);
  opacity: 0.85;
  margin: 0 0 24px;
}

#getting-started-content p code {
  font-family: monospace;
  background: var(--code-bg);
  color: var(--netizen-keyword);
  padding: 1px 5px;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 0.9em;
}

/* ── SNIPPET VERSION TABS ── */
#snippet-tabs {
  display: flex;
  gap: 3px;
  margin-bottom: -1px;
  position: relative;
  z-index: 1;
}

.version-tab {
  background: var(--bg-raised);
  border: 1px solid var(--netizen-attribute);
  border-bottom-color: var(--netizen-attribute);
  border-radius: 4px 4px 0 0;
  color: var(--netizen-text);
  font-family: monospace;
  font-size: 12px;
  padding: 5px 12px;
  cursor: pointer;
  transition: background 0.1s, color 0.1s, border-color 0.1s;
  opacity: 0.6;
}
.version-tab:hover {
  background: var(--code-bg);
  color: var(--netizen-tag);
  opacity: 1;
}
.version-tab.active {
  background: var(--code-bg);
  border-bottom-color: var(--code-bg);
  color: var(--netizen-tag);
  opacity: 1;
}

.snippet-wrap {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--netizen-attribute);
  border-radius: 0 6px 6px 6px;
  padding: 16px 20px;
  padding-right: 100px;
}

.snippet-wrap code {
  font-family: monospace;
  font-size: 13px;
  color: var(--netizen-tag);
  word-break: break-all;
}

/* ── SNIPPET WARNING ── */
#snippet-warning {
  margin-top: 10px;
  margin-bottom: 0;
  font-size: 13px;
  line-height: 1.65;
  color: color-mix(in srgb, var(--netizen-variable) 85%, var(--netizen-text));
  background: color-mix(in srgb, var(--netizen-variable) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--netizen-variable) 28%, transparent);
  border-radius: 5px;
  padding: 10px 14px;
}
#snippet-warning[hidden] { display: none; }
#snippet-warning strong { color: var(--netizen-variable); }

#copy-btn {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  background: var(--netizen-keyword);
  color: var(--netizen-background);
  border: none;
  border-radius: 4px;
  padding: 6px 14px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
  white-space: nowrap;
}
#copy-btn:hover { opacity: 0.8; }

/* ── INTERACTIVE ── */
#interactive {
  height: calc(100vh - var(--nav-height));
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* tabs bar */
#tabs {
  display: flex;
  border-bottom: var(--divider-width) var(--divider-style) var(--divider-color);
  overflow-x: auto;
  flex-shrink: 0;
  scrollbar-width: none;
}
#tabs::-webkit-scrollbar { display: none; }

.tab-btn {
  background: none;
  border: none;
  border-right: var(--divider-width) var(--divider-style) var(--divider-color);
  color: var(--netizen-text);
  padding: 10px 22px;
  font-family: monospace;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.1s, color 0.1s;
  opacity: 0.6;
}
.tab-btn:hover {
  background: var(--bg-raised);
  color: var(--netizen-keyword);
  opacity: 1;
}
.tab-btn.active {
  background: var(--bg-raised);
  color: var(--netizen-keyword);
  opacity: 1;
}

/* body below tabs */
#interactive-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

/* left info panel */
#info-panel {
  width: var(--panel-width);
  flex-shrink: 0;
  border-right: var(--divider-width) var(--divider-style) var(--divider-color);
  overflow-y: auto;
  padding: 28px 22px;
}

#demo-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--netizen-text);
  opacity: 0.85;
  margin: 0;
}

#demo-desc code {
  font-family: monospace;
  font-size: 0.9em;
  background: var(--code-bg);
  color: var(--netizen-keyword);
  padding: 1px 5px;
  border: 1px solid var(--border);
  border-radius: 3px;
}

#rerun-btn {
  margin-top: 18px;
  appearance: none;
  font-family: inherit;
  cursor: pointer;
}

/* preview iframe */
#preview-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
  min-width: 0;
}

#preview {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.pane-label {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--netizen-tag);
  color: var(--netizen-background);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  pointer-events: none;
  z-index: 10;
}
.label-example {
  right: auto;
  left: 50%;
  transform: translateX(-100%);
}