/* Umbral Vision — generator UI
 * Panel glassmorphic + thumbnails + audio indicator + presets + share
 * Coherente con la paleta del blog (--font-serif = Newsreader, --bg dark)
 */

:root {
  --uv-panel-bg: rgba(14, 14, 14, 0.55);
  --uv-panel-border: rgba(255, 255, 255, 0.08);
  --uv-panel-text: #e8e8e8;
  --uv-panel-muted: rgba(232, 232, 232, 0.55);
  --uv-accent: #bb4444;          /* rojo ceniza del sitio */
  --uv-accent-warm: #ff8855;
  --uv-bg: #0e0e0e;
  --uv-radius: 10px;
  --uv-z-panel: 10;
  --uv-z-overlay: 100;
  --uv-font: "Newsreader", Georgia, serif;
  --uv-font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace;
  --uv-fs-small: 0.78rem;
  --uv-fs-base: 0.95rem;
  --uv-fs-title: 1.05rem;
  --uv-transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--uv-bg);
  color: var(--uv-panel-text);
  font-family: var(--uv-font);
  overflow: hidden;
  height: 100%;
}

#generator main {
  position: fixed;
  inset: 0;
  z-index: 0;
}

#generator canvas {
  display: block;
}

/* === Panel === */

#panel {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: var(--uv-z-panel);
  background: var(--uv-panel-bg);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border: 1px solid var(--uv-panel-border);
  border-radius: var(--uv-radius);
  max-width: 360px;
  font-size: var(--uv-fs-base);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  transition: max-height var(--uv-transition), opacity var(--uv-transition);
  overflow: hidden;
  max-height: calc(100vh - 2rem);
}

#panel.collapsed {
  max-height: 2.6rem;
  opacity: 0.85;
}

#panel.collapsed > .panel-body {
  opacity: 0;
  pointer-events: none;
}

#panel.collapsed > .panel-header {
  border-bottom: none;
}

#panel-header,
.panel-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--uv-panel-border);
  user-select: none;
}

.panel-title {
  font-family: var(--uv-font);
  font-size: var(--uv-fs-title);
  font-weight: 500;
  margin: 0;
  flex: 1;
  letter-spacing: 0.02em;
}

.panel-toggle {
  background: none;
  border: none;
  color: var(--uv-panel-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  line-height: 1;
}

.panel-toggle:hover,
.panel-toggle:focus-visible {
  color: var(--uv-panel-text);
  background: rgba(255, 255, 255, 0.05);
  outline: none;
}

.panel-body {
  padding: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  max-height: calc(100vh - 4.5rem);
  overflow-y: auto;
}

.panel-body > section {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.panel-section-label {
  font-family: var(--uv-font-mono);
  font-size: var(--uv-fs-small);
  color: var(--uv-panel-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* === Thumbnails === */

#thumbnails {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.thumb {
  position: relative;
  aspect-ratio: 1;
  border: 1px solid var(--uv-panel-border);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.5);
  cursor: pointer;
  padding: 0;
  overflow: hidden;
  transition: transform 120ms, box-shadow 120ms, border-color 120ms;
}

.thumb:hover,
.thumb:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.2);
  outline: none;
}

.thumb[aria-pressed="true"] {
  border-color: var(--uv-accent);
  box-shadow: 0 0 0 1px var(--uv-accent), 0 0 14px rgba(187, 68, 68, 0.4);
  transform: scale(1.04);
}

.thumb canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.thumb-key {
  position: absolute;
  top: 2px;
  right: 4px;
  font-family: var(--uv-font-mono);
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.4);
  background: rgba(0, 0, 0, 0.5);
  padding: 0 0.25rem;
  border-radius: 2px;
}

.thumb-label {
  position: absolute;
  bottom: -1.2rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--uv-font-mono);
  font-size: var(--uv-fs-small);
  color: var(--uv-panel-muted);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms;
}

.thumb:hover .thumb-label,
.thumb:focus-visible .thumb-label {
  opacity: 1;
}

/* === Audio indicator === */

#audio-indicator {
  display: none;
  align-items: center;
  gap: 0.75rem;
  padding: 0.4rem 0;
}

#audio-indicator.active {
  display: flex;
}

#audio-ring {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--uv-accent) 0%, transparent 70%);
  transform: scale(1);
  transform-origin: center;
  transition: transform 60ms, background 100ms;
  flex-shrink: 0;
}

#audio-ring.peak {
  background: radial-gradient(circle, var(--uv-accent-warm) 0%, transparent 70%);
}

#audio-bars {
  display: flex;
  gap: 2px;
  align-items: flex-end;
  height: 36px;
  flex: 1;
}

.audio-bar {
  flex: 1;
  background: var(--uv-accent);
  border-radius: 2px;
  transition: height 60ms;
  min-height: 2px;
}

/* === Controls (sliders, buttons) === */

.panel-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.panel-row label {
  flex: 1;
  font-size: var(--uv-fs-small);
  color: var(--uv-panel-muted);
}

.panel-row input[type="range"] {
  flex: 1.5;
  accent-color: var(--uv-accent);
}

.panel-row input[type="checkbox"] {
  accent-color: var(--uv-accent);
}

.btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--uv-panel-border);
  color: var(--uv-panel-text);
  font-family: var(--uv-font);
  font-size: var(--uv-fs-small);
  padding: 0.4rem 0.7rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background 120ms, border-color 120ms;
}

.btn:hover,
.btn:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  outline: none;
}

.btn.primary {
  background: rgba(187, 68, 68, 0.15);
  border-color: var(--uv-accent);
  color: var(--uv-panel-text);
}

.btn.primary:hover {
  background: rgba(187, 68, 68, 0.3);
}

/* === Presets === */

#presets {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

#preset-select {
  flex: 1;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--uv-panel-border);
  color: var(--uv-panel-text);
  font-family: var(--uv-font);
  font-size: var(--uv-fs-small);
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
}

/* === Toast === */

#toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: var(--uv-z-overlay);
  background: var(--uv-panel-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--uv-panel-border);
  border-radius: var(--uv-radius);
  padding: 0.6rem 0.9rem;
  font-size: var(--uv-fs-small);
  pointer-events: none;
  opacity: 0;
  transform: translateY(0.5rem);
  transition: opacity 200ms, transform 200ms;
}

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

/* === Onboarding overlay === */

#onboarding {
  position: fixed;
  inset: 0;
  z-index: var(--uv-z-overlay);
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  backdrop-filter: blur(4px);
}

#onboarding[hidden] {
  display: none;
}

.onboarding-card {
  background: var(--uv-panel-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--uv-panel-border);
  border-radius: var(--uv-radius);
  padding: 1.5rem;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.onboarding-card h2 {
  margin: 0;
  font-family: var(--uv-font);
  font-size: 1.3rem;
  font-weight: 500;
}

.onboarding-tips {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.onboarding-tips li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--uv-fs-small);
  color: var(--uv-panel-text);
}

.onboarding-tips kbd {
  font-family: var(--uv-font-mono);
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--uv-panel-border);
  border-radius: 3px;
  padding: 0.1rem 0.4rem;
  min-width: 1.6rem;
  text-align: center;
}

/* === Capture / share === */

#share-row {
  display: flex;
  gap: 0.4rem;
}

/* === Mobile === */

@media (max-width: 768px) {
  #panel {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    max-width: none;
    max-height: 40vh;
    border-radius: var(--uv-radius) var(--uv-radius) 0 0;
  }

  #panel.collapsed {
    max-height: 2.6rem;
  }

  #thumbnails {
    grid-template-columns: repeat(5, 1fr);
  }

  .thumb-key {
    font-size: 0.6rem;
  }
}

/* === Reduced motion === */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  #panel {
    transition: none;
  }
}