/* The hidden attribute's default `display: none` is a browser-stylesheet
   rule, which any of this file's own `display` declarations below silently
   overrides (author styles beat the browser default regardless of selector
   specificity) — so every element toggled via `.hidden = true/false` in JS
   needs this guard, or it stays visible/laid-out even while "hidden". */
[hidden] {
  display: none !important;
}

.anaglyph-intro {
  padding: 56px 0 8px;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, var(--lighter-background), var(--background) 70%);
}

.anaglyph-intro h1 {
  color: var(--foreground);
  font-size: 2rem;
  margin-bottom: 8px;
}

.anaglyph-intro .tagline {
  color: var(--light-foreground);
  font-size: 0.95rem;
}

.anaglyph-panel {
  padding: 40px 0 80px;
}

.pair-row {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.pair-zone {
  flex: 1;
  min-width: 220px;
  border: 2px dashed var(--muted);
  border-radius: 12px;
  padding: 24px 16px;
  text-align: center;
  color: var(--light-foreground);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.pair-zone:hover,
.pair-zone:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.pair-zone.is-dragover {
  border-color: var(--accent);
  background: var(--lighter-background);
}

.pair-thumb {
  display: block;
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 10px;
}

.pair-label {
  color: var(--foreground);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.pair-hint {
  color: var(--muted);
  font-size: 0.75rem;
}

.pair-tip {
  max-width: 700px;
  margin: 16px auto 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
}

.anaglyph-status {
  max-width: 700px;
  margin: 20px auto 0;
  text-align: center;
  color: var(--light-foreground);
  font-size: 0.9rem;
}

.anaglyph-editor {
  max-width: 700px;
  margin: 24px auto 0;
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.control-row label {
  color: var(--light-foreground);
  font-size: 0.85rem;
  min-width: 110px;
}

.control-row select {
  background: var(--dark-background);
  color: var(--foreground);
  border: 1px solid var(--muted);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: inherit;
  font-size: 0.85rem;
}

.control-row input[type="range"] {
  flex: 1;
  min-width: 160px;
  accent-color: var(--accent);
}

#shift-value {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  min-width: 44px;
}

#swap-btn {
  margin-left: auto;
  background: var(--teal);
  color: var(--foreground);
  border: none;
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease;
}

#swap-btn:hover {
  transform: scale(1.05);
}

#preview {
  display: block;
  width: 100%;
  height: auto;
  background: var(--dark-background);
  border: 1px solid var(--muted);
  border-radius: 8px;
}

#download-btn {
  display: block;
  margin: 20px auto 0;
  background: var(--accent);
  color: var(--dark-background);
  border: none;
  border-radius: 999px;
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease;
}

#download-btn:hover {
  transform: scale(1.05);
}

.anaglyph-note {
  max-width: 700px;
  margin: 24px auto 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
}