/* ── Theme Variables ─────────────────────────────────────────────────── */

:root {
  --bg-primary: #0b1929;
  --bg-card: #111d2e;
  --accent-blue: #3b82f6;
  --accent-blue-dim: #1e3a5f;
  --success-green: #10b981;
  --warning-amber: #f59e0b;
  --text-primary: #e2e8f0;
  --text-muted: #64748b;
  --text-secondary: #94a3b8;
  --border-color: #1e293b;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;

  /* Breakdown bar colors */
  --color-metadata: #3b82f6;
  --color-photoshop: #a855f7;
  --color-vector: #f59e0b;
  --color-image: #10b981;
  --color-font: #7b9cff;
  --color-other: #64748b;
}

/* ── Reset & Base ────────────────────────────────────────────────────── */

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

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── Header ──────────────────────────────────────────────────────────── */

.header {
  width: 100%;
  max-width: 560px;
}

.header-accent {
  height: 4px;
  background: var(--accent-blue);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px 8px;
}

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

.header-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
}

.header-version {
  font-weight: 400;
  font-size: 14px;
  color: var(--text-muted);
}

.header-github {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  margin-right: 12px;
}

.header-github:hover {
  color: var(--accent-blue);
}

.header-byline {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
}

.header-byline:hover {
  color: var(--accent-blue);
}

.header-divider {
  height: 1px;
  background: var(--border-color);
  margin: 0 24px;
}

/* ── Privacy banner ──────────────────────────────────────────────────── */

.privacy-banner {
  width: 100%;
  max-width: 560px;
  padding: 6px 24px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.privacy-icon {
  font-size: 11px;
}

/* ── Content ─────────────────────────────────────────────────────────── */

.content {
  width: 100%;
  max-width: 560px;
  padding: 0 24px 24px;
  flex: 1;
}

/* ── Screen states ───────────────────────────────────────────────────── */

.screen {
  display: none;
}

.screen.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.screen-title {
  font-size: 16px;
  font-weight: 700;
  margin-top: 24px;
  margin-bottom: 6px;
}

.screen-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* ── Drop Zone ───────────────────────────────────────────────────────── */

.drop-zone {
  background: var(--bg-card);
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  outline: none;
}

.drop-zone:hover,
.drop-zone:focus-visible,
.drop-zone.dragover {
  border-color: var(--accent-blue);
  background: #0d2240;
}

.drop-zone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 36px 24px;
}

.drop-icon {
  color: var(--text-muted);
  margin-bottom: 12px;
}

.drop-text {
  font-size: 14px;
  color: var(--text-muted);
}

.drop-hint {
  font-size: 12px;
  color: var(--text-muted);
  opacity: 0.6;
  margin-top: 6px;
}

.large-file-link {
  background: none;
  border: none;
  color: var(--accent-blue);
  font-size: 12px;
  cursor: pointer;
  margin-top: 8px;
  padding: 0;
  opacity: 0.7;
}

.large-file-link:hover {
  opacity: 1;
  text-decoration: underline;
}

/* ── Progress ────────────────────────────────────────────────────────── */

.progress-container {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0;
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent-blue);
  border-radius: 3px;
  width: 0%;
  transition: width 0.3s ease;
}

.progress-fill.indeterminate {
  width: 30%;
  animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(440%); }
}

.progress-percent {
  font-size: 13px;
  color: var(--text-muted);
  min-width: 36px;
  text-align: right;
}

.filename-label {
  font-size: 13px;
  color: var(--accent-blue);
  margin-top: 8px;
  word-break: break-all;
}

/* ── File Info ────────────────────────────────────────────────────────── */

.file-info {
  margin-top: 16px;
  margin-bottom: 12px;
}

.file-info-name {
  font-size: 14px;
  font-weight: 700;
  word-break: break-all;
}

.file-info-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}

.file-info-size {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-blue);
}

.file-info-pages {
  font-size: 13px;
  color: var(--text-muted);
}

.file-info-sep {
  color: var(--text-muted);
}

/* ── Sections ────────────────────────────────────────────────────────── */

.section {
  margin-bottom: 12px;
}

.section-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.section-divider {
  height: 1px;
  background: var(--border-color);
  margin: 12px 0 16px;
}

/* ── Breakdown Bar Chart ─────────────────────────────────────────────── */

.breakdown-card {
  background: var(--bg-card);
  border-radius: 6px;
  padding: 14px 16px;
}

.breakdown-bar {
  display: flex;
  height: 14px;
  border-radius: 3px;
  overflow: hidden;
  background: #1e2d3d;
  margin-bottom: 12px;
}

.breakdown-segment {
  height: 100%;
  min-width: 2px;
  transition: width 0.4s ease;
}

.breakdown-legend {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.breakdown-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breakdown-dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}

.breakdown-label {
  flex: 1;
  font-size: 13px;
  color: var(--text-primary);
}

.breakdown-bar-mini {
  flex: 2;
  height: 10px;
  background: #1e2d3d;
  border-radius: 2px;
  overflow: hidden;
}

.breakdown-bar-mini-fill {
  height: 100%;
  border-radius: 2px;
}

.breakdown-value {
  font-size: 13px;
  font-weight: 700;
  min-width: 70px;
  text-align: right;
}

/* ── Recommendation ──────────────────────────────────────────────────── */

.recommendation-box {
  background: #0d2b1e;
  border: 1px solid var(--success-green);
  border-radius: 6px;
  padding: 12px 14px;
  margin-bottom: 16px;
}

.recommendation-header {
  font-size: 12px;
  font-weight: 700;
  color: var(--success-green);
  margin-bottom: 4px;
}

.recommendation-text {
  font-size: 13px;
  color: var(--text-primary);
  line-height: 1.5;
}

/* ── Option Cards ────────────────────────────────────────────────────── */

.option-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.option-card:hover {
  border-color: var(--accent-blue-dim);
}

.option-card.selected {
  border-color: var(--accent-blue);
}

.option-card[data-mode="metadata"].selected {
  border-color: var(--accent-blue);
}

.option-card[data-mode="image-compress"].selected {
  border-color: var(--warning-amber);
}

.option-card[data-mode="flatten"].selected {
  border-color: var(--success-green);
}

.option-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.option-radio {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.option-radio input[type="radio"] {
  display: none;
}

.radio-dot {
  width: 18px;
  height: 18px;
  border: 2px solid var(--text-muted);
  border-radius: 50%;
  position: relative;
  transition: border-color 0.2s;
}

.option-radio input[type="radio"]:checked + .radio-dot {
  border-color: var(--accent-blue);
}

.option-radio input[type="radio"]:checked + .radio-dot::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-blue);
}

.option-card[data-mode="image-compress"] .option-radio input[type="radio"]:checked + .radio-dot {
  border-color: var(--warning-amber);
}
.option-card[data-mode="image-compress"] .option-radio input[type="radio"]:checked + .radio-dot::after {
  background: var(--warning-amber);
}

.option-card[data-mode="flatten"] .option-radio input[type="radio"]:checked + .radio-dot {
  border-color: var(--success-green);
}
.option-card[data-mode="flatten"] .option-radio input[type="radio"]:checked + .radio-dot::after {
  background: var(--success-green);
}

.option-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.option-title {
  font-size: 14px;
  font-weight: 700;
}

.badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
  letter-spacing: 0.5px;
}

.badge-recommended {
  color: var(--success-green);
  background: rgba(16, 185, 129, 0.15);
}

.badge-smallest {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.option-size {
  font-size: 13px;
  font-weight: 700;
  color: var(--success-green);
  white-space: nowrap;
}

.option-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
  padding-left: 26px;
  line-height: 1.4;
}

/* ── Controls (sliders, DPI radios) ──────────────────────────────────── */

.control-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding-left: 26px;
}

.control-label {
  font-size: 13px;
  color: var(--text-muted);
  min-width: 52px;
}

/* Slider */
.slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  outline: none;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-blue);
  cursor: pointer;
  border: 2px solid var(--bg-card);
}

.slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-blue);
  cursor: pointer;
  border: 2px solid var(--bg-card);
}

.option-card[data-mode="image-compress"] .slider::-webkit-slider-thumb {
  background: var(--warning-amber);
}
.option-card[data-mode="image-compress"] .slider::-moz-range-thumb {
  background: var(--warning-amber);
}
.option-card[data-mode="flatten"] .slider::-webkit-slider-thumb {
  background: var(--success-green);
}
.option-card[data-mode="flatten"] .slider::-moz-range-thumb {
  background: var(--success-green);
}

.control-value-group {
  display: flex;
  align-items: center;
  gap: 2px;
}

.control-input {
  width: 42px;
  background: var(--accent-blue-dim);
  border: none;
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  padding: 4px;
  font-family: var(--font);
}

.control-input:focus {
  outline: 1px solid var(--accent-blue);
}

.control-unit {
  font-size: 13px;
  color: var(--text-muted);
}

/* Remove number input spinners */
.control-input::-webkit-inner-spin-button,
.control-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.control-input {
  -moz-appearance: textfield;
}

.range-labels {
  display: flex;
  justify-content: space-between;
  padding-left: 78px;
  padding-right: 56px;
  margin-top: 2px;
}

.range-labels span {
  font-size: 11px;
  color: var(--text-muted);
  opacity: 0.7;
}

/* DPI radio group */
.dpi-group {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.dpi-option {
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
}

.dpi-option:hover {
  color: var(--text-primary);
  border-color: var(--border-color);
}

.dpi-option input[type="radio"] {
  display: none;
}

.dpi-option:has(input:checked) {
  background: var(--accent-blue-dim);
  color: var(--text-primary);
  border-color: var(--accent-blue);
}

.option-card[data-mode="flatten"] .dpi-option:has(input:checked) {
  border-color: var(--success-green);
  background: rgba(16, 185, 129, 0.15);
}

.option-card[data-mode="image-compress"] .dpi-option:has(input:checked) {
  border-color: var(--warning-amber);
  background: rgba(245, 158, 11, 0.15);
}

/* ── Option section ──────────────────────────────────────────────────── */

.option-section {
  margin-top: 4px;
}

/* ── Action buttons ──────────────────────────────────────────────────── */

.action-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
  gap: 12px;
}

.btn {
  font-family: var(--font);
  font-size: 13px;
  font-weight: 700;
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent-blue);
  color: white;
}

.btn-primary:hover {
  background: #2563eb;
}

.btn-secondary {
  background: var(--accent-blue-dim);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: #253d5c;
}

.btn-link {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  padding: 8px 0 0;
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

/* ── Done Screen ─────────────────────────────────────────────────────── */

.done-icon {
  font-size: 48px;
  color: var(--success-green);
  text-align: center;
  margin-top: 28px;
  margin-bottom: 4px;
}

.done-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--success-green);
  text-align: center;
  margin-bottom: 4px;
}

.done-filename {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 20px;
  word-break: break-all;
}

.done-card {
  background: var(--bg-card);
  border-radius: 8px;
  padding: 16px 20px;
}

.done-row {
  display: flex;
  justify-content: space-between;
  padding: 5px 0;
}

.done-label {
  font-size: 14px;
  color: var(--text-muted);
}

.done-value {
  font-size: 14px;
  font-weight: 700;
}

.done-value-highlight {
  color: var(--text-primary);
}

.done-value-success {
  color: var(--success-green);
}

.done-value-warning {
  color: var(--warning-amber);
}

/* ── Before / After comparison bar ──────────────────────────────────── */

.compare-bar-wrap {
  margin-top: 16px;
}

.compare-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.compare-bar {
  position: relative;
  height: 28px;
  background: var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.compare-bar-original {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--text-muted);
  opacity: 0.25;
  border-radius: 6px;
  transition: width 0.6s ease;
}

.compare-bar-new {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--success-green);
  border-radius: 6px;
  transition: width 0.6s ease;
}

.compare-bar-new.warning {
  background: var(--warning-amber);
}

.compare-savings {
  text-align: center;
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

.compare-savings strong {
  color: var(--success-green);
  font-weight: 700;
}

.compare-savings strong.warning {
  color: var(--warning-amber);
}

/* ── Batch mode ────────────────────────────────────────────────────── */

.batch-results {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
  max-height: 300px;
  overflow-y: auto;
}

.batch-result-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px 14px;
}

.batch-result-info {
  flex: 1;
  min-width: 0;
}

.batch-result-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.batch-result-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.batch-result-reduction {
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  margin-left: 12px;
}

/* ── PWA Install prompt ────────────────────────────────────────────── */

.pwa-install-banner {
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: 8px 24px;
  display: none;
}

.pwa-install-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px;
  background: var(--bg-card);
  border: 1px dashed var(--accent-blue);
  border-radius: 8px;
  color: var(--accent-blue);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.pwa-install-btn:hover {
  background: var(--accent-blue-dim);
}

/* ── Utility ─────────────────────────────────────────────────────────── */

.hidden {
  display: none !important;
}

/* ── Footer ──────────────────────────────────────────────────────────── */

.footer {
  max-width: 600px;
  margin: 40px auto 20px;
  padding: 20px 24px;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-disclaimer {
  font-size: 11px;
  color: var(--text-muted);
  opacity: 0.6;
  line-height: 1.5;
  margin-bottom: 10px;
}

.footer-links {
  font-size: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent-blue);
}

.footer-sep {
  color: var(--text-muted);
  opacity: 0.4;
  margin: 0 6px;
}

.footer-byline {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  opacity: 0.6;
}

.footer-byline a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-byline a:hover {
  color: var(--accent-blue);
}

/* ── Marketing Sections ─────────────────────────────────────────────── */

.marketing {
  width: 100%;
  max-width: 860px;
  padding: 0 24px;
  margin: 0 auto;
}

.marketing-section {
  margin-top: 48px;
}

.marketing-heading {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 24px;
}

/* Feature grid */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
}

.feature-icon {
  font-size: 24px;
  margin-bottom: 8px;
}

.feature-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.feature-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Steps row */

.steps-row {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.step-card {
  flex: 1;
  max-width: 220px;
  text-align: center;
  padding: 0 12px;
}

.step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: white;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
}

.step-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.step-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.step-connector {
  width: 32px;
  height: 2px;
  background: var(--border-color);
  flex-shrink: 0;
  margin-top: 18px;
}

/* Compression modes explained */

.modes-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mode-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px 20px;
}

.mode-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.mode-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.mode-dot-blue  { background: var(--accent-blue); }
.mode-dot-amber { background: var(--warning-amber); }
.mode-dot-green { background: var(--success-green); }

.mode-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.mode-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Ko-fi support */

.marketing-section-support {
  text-align: center;
  padding: 24px 0;
}

.support-text {
  font-size: 14px;
  color: var(--text-muted);
}

.kofi-link {
  color: var(--accent-blue);
  text-decoration: none;
  font-weight: 600;
}

.kofi-link:hover {
  text-decoration: underline;
}

/* Responsive */

@media (max-width: 580px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .steps-row {
    flex-direction: column;
    align-items: center;
  }

  .step-connector {
    width: 2px;
    height: 20px;
    margin: 0;
  }
}