/* ===== HDR Glow tool -- extends styles.css (shares :root variables) ===== */

.hdr-tool {
  position: relative;
  z-index: 1;
  max-width: 820px;
  padding: 8rem 2rem 4rem;
  margin: 0 auto;
}

.hdr-tool-intro {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
  max-width: 640px;
}

.hdr-privacy-note {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-green);
  background: rgba(0, 255, 136, 0.06);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
  margin-bottom: 2.5rem;
  display: inline-block;
}

/* ---- Drop zones ---- */
.hdr-dropzones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-bottom: 1rem;
}

.hdr-dropzone {
  background: var(--bg-card);
  border: 1.5px dashed rgba(0, 240, 255, 0.25);
  border-radius: var(--radius);
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hdr-dropzone:hover,
.hdr-dropzone:focus-visible {
  border-color: var(--accent);
  box-shadow: var(--glow);
  outline: none;
}

.hdr-dropzone.dragover {
  border-color: var(--accent);
  background: rgba(0, 240, 255, 0.06);
  box-shadow: var(--glow-strong);
}

.hdr-dropzone.has-file {
  border-style: solid;
  border-color: var(--accent-green);
}

.hdr-dropzone-preview {
  height: 110px;
  border-radius: calc(var(--radius) - 4px);
  background-color: rgba(255, 255, 255, 0.02);
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  overflow: hidden;
  word-break: break-all;
  text-align: center;
  padding: 0.5rem;
}

.hdr-dropzone-label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.95rem;
}

.hdr-required {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: rgba(0, 240, 255, 0.1);
  border-radius: 50px;
  padding: 0.1rem 0.5rem;
  margin-left: 0.4rem;
}

.hdr-optional {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50px;
  padding: 0.1rem 0.5rem;
  margin-left: 0.4rem;
}

.hdr-dropzone-hint {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.hdr-note {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-purple);
  background: rgba(168, 85, 247, 0.08);
  border: 1px solid rgba(168, 85, 247, 0.2);
  border-radius: var(--radius);
  padding: 0.7rem 1rem;
  margin-bottom: 1.5rem;
}

/* ---- Sliders ---- */
.hdr-controls {
  display: flex;
  flex-direction: column;
  gap: 1.3rem;
  margin: 2rem 0;
}

.hdr-slider {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hdr-slider-label {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
}

.hdr-slider-label output {
  color: var(--accent);
  font-weight: 700;
}

.hdr-slider input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

.hdr-slider input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--gradient);
  cursor: pointer;
  box-shadow: var(--glow);
  border: none;
}

.hdr-slider input[type='range']::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
  box-shadow: var(--glow);
}

/* ---- Progress ---- */
.hdr-progress {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.hdr-progress[hidden] {
  display: none;
}

.hdr-progress-track {
  flex: 1;
  height: 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.hdr-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--gradient);
  transition: width 0.2s ease;
}

/* ---- Previews ---- */
.hdr-preview-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.hdr-preview-card h3 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hdr-preview-frame {
  background: var(--bg-card);
  border: 1px solid rgba(0, 240, 255, 0.08);
  border-radius: var(--radius);
  aspect-ratio: 4 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hdr-preview-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: none;
}

.hdr-preview-frame img[src] {
  display: block;
}

.hdr-preview-empty {
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  padding: 1rem;
  text-align: center;
}

.hdr-preview-hint {
  color: var(--text-secondary);
  font-size: 0.78rem;
  margin-top: 0.5rem;
}

/* ---- Actions ---- */
.hdr-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hdr-actions .btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* ---- Help ---- */
.hdr-help {
  background: var(--bg-card);
  border: 1px solid rgba(0, 240, 255, 0.08);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
}

.hdr-help summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
}

.hdr-help ul {
  margin: 1rem 0 0.3rem 1.2rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

@media (max-width: 700px) {
  .hdr-dropzones,
  .hdr-preview-row {
    grid-template-columns: 1fr;
  }
  .hdr-tool { padding: 6.5rem 1.5rem 3rem; }
}