/**
 * EB-001: Image Compressor — Modern Minimalist Interface
 * Designed for speed, lightness, and effortless UX
 */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-page);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Container */
.container {
  width: 100%;
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding-inline: 2rem;
  }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(251, 251, 253, 0.85);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding-block: 0.875rem;
}

[data-theme="dark"] .site-header,
:root:not([data-theme="light"]) .site-header {
  background-color: rgba(17, 21, 32, 0.85);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

.nav-back-link:hover {
  color: var(--text-primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.privacy-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--success);
  background-color: var(--success-subtle);
  border: 1px solid var(--success-border);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.9rem;
}

/* Hero */
.tool-hero {
  text-align: center;
  padding-block: 2.75rem 2rem;
}

.tool-heading {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.tool-subtitle {
  max-width: 540px;
  margin-inline: auto;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Dropzone Area */
.dropzone-box {
  background-color: var(--bg-surface);
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 3rem 1.5rem;
  text-align: center;
  cursor: pointer;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.dropzone-box:hover,
.dropzone-box.dragover {
  border-color: var(--accent);
  background-color: var(--accent-subtle);
  transform: translateY(-2px);
}

.dropzone-icon-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.dropzone-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.dropzone-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.btn-choose {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--bg-page);
  background-color: var(--text-primary);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: opacity var(--dur-fast) var(--ease);
}

.btn-choose:hover {
  opacity: 0.9;
}

.dropzone-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Workspace */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 900px) {
  .workspace-grid {
    grid-template-columns: 320px 1fr;
  }
}

/* Control Panel */
.panel-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  height: fit-content;
}

.panel-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.control-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.val-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  background-color: var(--accent-subtle);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
}

/* Sliders */
input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--bg-hover);
  outline: none;
  cursor: pointer;
  accent-color: var(--accent);
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg-surface);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
  transition: transform var(--dur-fast) var(--ease);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.presets-row {
  display: flex;
  gap: 0.35rem;
}

.preset-btn {
  flex: 1;
  padding: 0.3rem 0.4rem;
  font-size: 0.75rem;
  font-weight: 500;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
  cursor: pointer;
  text-align: center;
  transition: background-color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.preset-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

/* Inputs & Selects */
.ui-select,
.ui-input {
  width: 100%;
  padding: 0.45rem 0.65rem;
  font-size: 0.8125rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  color: var(--text-primary);
  outline: none;
}

.ui-select:focus,
.ui-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-subtle);
}

/* Engine Mode Pill */
.engine-switcher {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem;
  background-color: var(--bg-subtle);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.engine-pill {
  padding: 0.35rem;
  border: none;
  background: transparent;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.engine-pill.active {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* Preview Section */
.preview-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.preview-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.stats-badges-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
}

.metric-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  font-variant-numeric: tabular-nums;
}

.metric-pill.highlight {
  color: var(--success);
  background-color: var(--success-subtle);
  border-color: var(--success-border);
}

/* Comparison Canvas View */
.slider-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  max-height: 480px;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  user-select: none;
  background-image: 
    linear-gradient(45deg, var(--bg-hover) 25%, transparent 25%),
    linear-gradient(-45deg, var(--bg-hover) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--bg-hover) 75%),
    linear-gradient(-45deg, transparent 75%, var(--bg-hover) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

.img-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.compressed-mask {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.compressed-mask img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.split-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: #ffffff;
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.4);
  pointer-events: none;
  z-index: 5;
}

.split-thumb-knob {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: #ffffff;
  color: #111827;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 800;
}

.slider-overlay-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  margin: 0;
  cursor: ew-resize;
  z-index: 10;
}

.corner-label {
  position: absolute;
  bottom: 0.75rem;
  padding: 2px 6px;
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: var(--radius-xs);
  background-color: rgba(0, 0, 0, 0.65);
  color: #ffffff;
  pointer-events: none;
  z-index: 6;
}

.corner-label.left {
  left: 0.75rem;
}

.corner-label.right {
  right: 0.75rem;
}

/* Queue List */
.queue-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2.5rem;
}

.queue-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.queue-items-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 360px;
  overflow-y: auto;
}

.queue-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: border-color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
  cursor: pointer;
}

.queue-row:hover {
  border-color: var(--border-medium);
}

.queue-row.active {
  border-color: var(--accent);
  background-color: var(--accent-subtle);
}

.row-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.thumb-preview {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  object-fit: cover;
  flex-shrink: 0;
  background-color: var(--bg-hover);
}

.file-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.file-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-sizes {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.row-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* Action Buttons */
.btn-solid {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--bg-page);
  background-color: var(--text-primary);
  border: none;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: opacity var(--dur-fast) var(--ease);
}

.btn-solid:hover {
  opacity: 0.9;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.btn-ghost:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.75rem;
  transition: color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
}

.icon-btn:hover {
  color: var(--text-primary);
  background-color: var(--bg-hover);
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  padding-block: 2rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
}