/**
 * PDF Scan Compressor — Styles
 *
 * Full-width layout. Settings on the left, drop zone on the right.
 * Stacks vertically on narrow screens.
 *
 * Responsive breakpoints:
 *   - < 700px:  Stack vertically (phones, small tablets, compact Chromebooks)
 *   - >= 700px: Side-by-side layout (settings left, dropzone right)
 *   - > 1600px: Larger touch targets and text for 4K / Retina / Surface Pro
 */

/* ------------------------------------------------------------------ */
/*  Custom properties                                                 */
/* ------------------------------------------------------------------ */

.pdf-compressor {
  --psc-primary: #0073aa;
  --psc-primary-hover: #005f8d;
  --psc-success: #00a32a;
  --psc-success-hover: #008a20;
  --psc-warning: #dba617;
  --psc-error: #d63638;
  --psc-border: #c3c4c7;
  --psc-bg: #fff;
  --psc-bg-light: #f6f7f7;
  --psc-text: #1d2327;
  --psc-text-muted: #646970;
  --psc-radius: 6px;
  --psc-gap: 16px;

  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  color: var(--psc-text);
  width: 100%;
}

/* Screen-reader-only live region */
.pdf-compressor__sr-announce {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ------------------------------------------------------------------ */
/*  Top row: settings (left) + drop zone (right)                      */
/* ------------------------------------------------------------------ */

.pdf-compressor__top {
  display: flex;
  gap: var(--psc-gap);
  margin-bottom: var(--psc-gap);
  align-items: stretch;
}

/* ------------------------------------------------------------------ */
/*  Compression options (left panel)                                  */
/* ------------------------------------------------------------------ */

.pdf-compressor__options {
  flex: 1 1 0;
  min-width: 0;
  border: 1px solid var(--psc-border);
  border-radius: var(--psc-radius);
  padding: 12px var(--psc-gap) var(--psc-gap);
  background: var(--psc-bg);
}

/* Segmented preset control */
.pdf-compressor__presets {
  display: flex;
  gap: 0;
  margin-bottom: 8px;
  border: 2px solid var(--psc-border);
  border-radius: var(--psc-radius);
  overflow: hidden;
}

.pdf-compressor__preset {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 6px;
  border: none;
  border-right: 1px solid var(--psc-border);
  cursor: pointer;
  text-align: center;
  transition: background 0.15s, color 0.15s;
  background: var(--psc-bg);
}

.pdf-compressor__preset:last-child {
  border-right: none;
}

.pdf-compressor__preset:hover {
  background: var(--psc-bg-light);
}

.pdf-compressor__preset input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.pdf-compressor__preset:has(input:checked) {
  background: var(--psc-primary);
  color: #fff;
}

.pdf-compressor__preset:has(input:checked) .pdf-compressor__preset-label {
  color: #fff;
  font-weight: 700;
}

.pdf-compressor__preset:has(input:checked) .pdf-compressor__preset-detail {
  color: rgba(255, 255, 255, 0.85);
}

.pdf-compressor__preset:focus-within {
  outline: 2px solid var(--psc-primary);
  outline-offset: -2px;
}

.pdf-compressor__preset-label {
  font-weight: 600;
  font-size: 0.875rem;
  line-height: 1.3;
}

.pdf-compressor__preset-detail {
  font-size: 0.75rem;
  color: var(--psc-text-muted);
  margin-top: 1px;
}

/* Advanced toggle */
.pdf-compressor__advanced {
  margin-bottom: 0;
}

.pdf-compressor__advanced summary {
  cursor: pointer;
  color: var(--psc-primary);
  font-weight: 500;
  font-size: 0.875rem;
  padding: 4px 0;
}

.pdf-compressor__advanced summary:focus-visible {
  outline: 2px solid var(--psc-primary);
  outline-offset: 2px;
}

.pdf-compressor__advanced-inner {
  padding: 12px 0 0;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.pdf-compressor__slider-group {
  flex: 1 1 100%;
}

.pdf-compressor__slider-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 4px;
  font-size: 0.875rem;
}

.pdf-compressor__slider-group input[type="range"] {
  width: 100%;
  accent-color: var(--psc-primary);
}

.pdf-compressor__hint {
  display: block;
  font-size: 0.78rem;
  color: var(--psc-text-muted);
  margin-top: 2px;
}

/* Checkbox group */
.pdf-compressor__checkbox-group {
  flex: 1 1 100%;
  margin-top: 4px;
}

.pdf-compressor__checkbox-group label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
}

.pdf-compressor__checkbox-group input[type="checkbox"] {
  accent-color: var(--psc-primary);
  width: 16px;
  height: 16px;
  margin: 0;
}

/* ------------------------------------------------------------------ */
/*  Drop zone (right panel)                                           */
/* ------------------------------------------------------------------ */

.pdf-compressor__dropzone {
  flex: 1 1 0;
  min-width: 0;
  border: 2px dashed var(--psc-border);
  border-radius: var(--psc-radius);
  padding: 28px var(--psc-gap);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pdf-compressor__dropzone:hover,
.pdf-compressor__dropzone:focus-visible {
  border-color: var(--psc-primary);
  background: var(--psc-bg-light);
}

.pdf-compressor__dropzone--active {
  border-color: var(--psc-primary);
  background: #f0f6fc;
}

.pdf-compressor__dropzone:focus-visible {
  outline: 2px solid var(--psc-primary);
  outline-offset: 2px;
}

.pdf-compressor__dropzone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.pdf-compressor__dropzone-icon {
  color: var(--psc-text-muted);
  margin-bottom: 8px;
}

.pdf-compressor__dropzone-text {
  font-size: 1rem;
  color: var(--psc-text-muted);
  margin: 0 0 12px;
}

/* Compact dropzone (shown when files are in queue) */
.pdf-compressor__dropzone--compact .pdf-compressor__dropzone-inner {
  display: none;
}

.pdf-compressor__dropzone--compact .pdf-compressor__dropzone-compact {
  display: flex !important;
}

.pdf-compressor__dropzone-compact {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--psc-primary);
  font-weight: 500;
}

.pdf-compressor__dropzone-compact-icon {
  flex-shrink: 0;
}

/* ------------------------------------------------------------------ */
/*  Buttons                                                           */
/* ------------------------------------------------------------------ */

.pdf-compressor__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid var(--psc-border);
  border-radius: var(--psc-radius);
  background: var(--psc-bg);
  color: var(--psc-text);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  white-space: nowrap;
}

.pdf-compressor__btn:hover {
  background: var(--psc-bg-light);
  border-color: #8c8f94;
}

.pdf-compressor__btn:active {
  transform: scale(0.97);
}

.pdf-compressor__btn:focus-visible {
  outline: 2px solid var(--psc-primary);
  outline-offset: 2px;
}

.pdf-compressor__btn--choose {
  background: var(--psc-primary);
  border-color: var(--psc-primary);
  color: #fff;
  padding: 8px 24px;
  font-size: 0.95rem;
}

.pdf-compressor__btn--choose:hover {
  background: var(--psc-primary-hover);
  border-color: var(--psc-primary-hover);
  color: #fff;
}

.pdf-compressor__btn--start {
  background: var(--psc-primary);
  border-color: var(--psc-primary);
  color: #fff;
}

.pdf-compressor__btn--start:hover {
  background: var(--psc-primary-hover);
  color: #fff;
}

.pdf-compressor__btn--cancel {
  background: #fff;
  border-color: var(--psc-error);
  color: var(--psc-error);
}

.pdf-compressor__btn--cancel:hover {
  background: var(--psc-error);
  color: #fff;
}

.pdf-compressor__btn--download {
  background: var(--psc-success);
  border-color: var(--psc-success);
  color: #fff;
  padding: 8px 20px;
  font-weight: 600;
}

.pdf-compressor__btn--download:hover {
  background: var(--psc-success-hover);
  color: #fff;
}

.pdf-compressor__btn--remove {
  background: transparent;
  border-color: transparent;
  color: var(--psc-text-muted);
  font-size: 0.8rem;
  padding: 4px 8px;
}

.pdf-compressor__btn--remove:hover {
  color: var(--psc-error);
}

.pdf-compressor__btn--clear {
  background: transparent;
  border-color: var(--psc-border);
  color: var(--psc-text-muted);
}

.pdf-compressor__btn--clear:hover {
  color: var(--psc-error);
  border-color: var(--psc-error);
}

/* ------------------------------------------------------------------ */
/*  Queue items                                                       */
/* ------------------------------------------------------------------ */

.pdf-compressor__queue {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: var(--psc-gap);
}

.pdf-compressor__item {
  border: 1px solid var(--psc-border);
  border-radius: var(--psc-radius);
  padding: 12px var(--psc-gap);
  background: var(--psc-bg);
  transition: border-color 0.2s;
}

.pdf-compressor__item--done {
  border-color: var(--psc-success);
}

.pdf-compressor__item--error {
  border-color: var(--psc-error);
}

.pdf-compressor__item-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}

.pdf-compressor__item-name {
  font-weight: 600;
  word-break: break-all;
}

.pdf-compressor__item-size,
.pdf-compressor__item-pages {
  font-size: 0.85rem;
  color: var(--psc-text-muted);
}

/* Progress bar */
.pdf-compressor__item-progress-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.pdf-compressor__item-progress {
  flex: 1;
  height: 10px;
  background: #e8e8ea;
  border-radius: 5px;
  overflow: hidden;
}

.pdf-compressor__item-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--psc-primary);
  border-radius: 5px;
  transition: width 0.25s ease;
}

/* Pulse animation while processing */
.pdf-compressor__item--processing .pdf-compressor__item-progress-bar {
  animation: psc-pulse 1.5s ease-in-out infinite;
}

@keyframes psc-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Green bar on completion */
.pdf-compressor__item--done .pdf-compressor__item-progress-bar {
  background: var(--psc-success);
  animation: none;
}

.pdf-compressor__item-percent {
  font-size: 0.8rem;
  color: var(--psc-text-muted);
  min-width: 36px;
  text-align: right;
}

/* Status text */
.pdf-compressor__item-status {
  font-size: 0.85rem;
  margin-bottom: 8px;
  min-height: 1.2em;
}

.pdf-compressor__item-status--info {
  color: var(--psc-text-muted);
}

.pdf-compressor__item-status--success {
  color: var(--psc-success);
  font-weight: 600;
  font-size: 0.9rem;
}

.pdf-compressor__item-status--warning {
  color: var(--psc-warning);
}

.pdf-compressor__item-status--error {
  color: var(--psc-error);
}

/* Item action buttons */
.pdf-compressor__item-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

/* Global actions row — sticky at bottom */
.pdf-compressor__actions {
  position: sticky;
  bottom: 0;
  text-align: right;
  margin-bottom: var(--psc-gap);
  padding: 8px 0;
  background: linear-gradient(transparent, var(--psc-bg) 30%);
}

/* Error (feature detection) */
.pdf-compressor__error {
  color: var(--psc-error);
  font-weight: 600;
  padding: 16px;
}

/* ------------------------------------------------------------------ */
/*  Responsive: stack on narrow screens                               */
/* ------------------------------------------------------------------ */

@media (max-width: 700px) {
  .pdf-compressor {
    --psc-gap: 12px;
  }

  .pdf-compressor__top {
    flex-direction: column;
  }

  .pdf-compressor__dropzone {
    min-height: 120px;
    padding: 20px var(--psc-gap);
  }

  .pdf-compressor__dropzone-icon {
    width: 36px;
    height: 36px;
  }

  .pdf-compressor__dropzone-text {
    font-size: 0.9rem;
  }

  .pdf-compressor__preset-label {
    font-size: 0.8rem;
  }

  .pdf-compressor__preset-detail {
    font-size: 0.7rem;
  }

  .pdf-compressor__preset {
    padding: 6px 4px;
  }

  .pdf-compressor__item {
    padding: 10px 12px;
  }

  .pdf-compressor__item-actions {
    gap: 6px;
  }

  .pdf-compressor__btn {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  .pdf-compressor__btn--download {
    padding: 7px 14px;
  }
}

/* ------------------------------------------------------------------ */
/*  Responsive: high-DPI / 4K / Surface Pro                           */
/* ------------------------------------------------------------------ */

@media (min-width: 1600px) {
  .pdf-compressor {
    --psc-gap: 20px;
    font-size: 1.05rem;
  }

  .pdf-compressor__btn {
    padding: 9px 20px;
    font-size: 0.95rem;
  }

  .pdf-compressor__btn--choose {
    padding: 10px 28px;
    font-size: 1rem;
  }

  .pdf-compressor__btn--download {
    padding: 10px 24px;
    font-size: 1rem;
  }

  .pdf-compressor__preset {
    padding: 10px 8px;
  }

  .pdf-compressor__preset-label {
    font-size: 0.95rem;
  }

  .pdf-compressor__item-progress {
    height: 12px;
    border-radius: 6px;
  }

  .pdf-compressor__item-progress-bar {
    border-radius: 6px;
  }

  /* Larger touch targets for touch screens */
  .pdf-compressor__slider-group input[type="range"] {
    height: 24px;
  }

  .pdf-compressor__checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
  }
}