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

:root {
  --bg: #f3f4f6;
  --bg-subtle: #ebedf0;
  --surface: #ffffff;
  --surface-hover: #fafafa;
  --text: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --accent: #111827;
  --accent-hover: #374151;
  --accent-soft: rgba(17, 24, 39, 0.06);
  --success: #059669;
  --success-soft: #ecfdf5;
  --error: #dc2626;
  --radius-sm: 12px;
  --radius: 18px;
  --radius-lg: 24px;
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --drop-accent: #6ab04c;
  --drop-accent-soft: rgba(106, 176, 76, 0.12);
  --drop-accent-mid: rgba(106, 176, 76, 0.22);
  --drop-glow: rgba(106, 176, 76, 0.35);
  --drop-glow-strong: rgba(106, 176, 76, 0.55);
  --container: 1200px;
  --content: 800px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app {
  min-height: 100dvh;
  padding: 0 1.25rem calc(3rem + var(--safe-bottom));
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
}

/* —— First screen (hero) —— */
.hero-fold {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: min(100dvh, 900px);
  padding: 2rem 0 2.5rem;
  margin-bottom: 1rem;
}

/* —— Header —— */
.header {
  text-align: center;
  max-width: 42rem;
  margin: 0 auto 2rem;
  padding: 0 0.5rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.header h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text);
}

.subtitle {
  margin-top: 1rem;
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  font-weight: 400;
  line-height: 1.55;
  color: var(--text-secondary);
  letter-spacing: -0.015em;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

/* —— Hero / Upload —— */
.hero {
  width: 100%;
  max-width: var(--content);
  margin: 0 auto;
  flex-shrink: 0;
}

.workspace {
  max-width: var(--content);
  margin: 0 auto;
  padding-bottom: 1rem;
}

.upload-shell {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 0.625rem;
  transition:
    box-shadow var(--transition-smooth),
    transform var(--transition-smooth);
}

.upload-shell:has(.dropzone:hover),
.upload-shell:has(.dropzone:focus-visible) {
  box-shadow:
    var(--shadow-lg),
    0 0 0 1px rgba(106, 176, 76, 0.08);
}

.upload-shell:has(.dropzone.dragover) {
  box-shadow:
    var(--shadow-lg),
    0 0 0 4px var(--drop-glow),
    0 0 32px var(--drop-accent-mid);
  transform: scale(1.008);
}

label.dropzone {
  position: relative;
  display: block;
  min-height: 340px;
  padding: 0;
  border: none;
  border-radius: calc(var(--radius-lg) - 6px);
  cursor: pointer;
  overflow: hidden;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--transition-smooth);
}

label.dropzone:hover,
label.dropzone:focus-visible {
  outline: none;
}

label.dropzone.dragover {
  transform: scale(1.01);
}

/* Animated dashed border (SVG) */
.dropzone-border {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  border-radius: inherit;
}

.dropzone-border-svg {
  display: block;
  width: 100%;
  height: 100%;
}

.dropzone-border-rect {
  fill: none;
  stroke: var(--border-strong);
  stroke-width: 1.5;
  stroke-dasharray: 9 7;
  vector-effect: non-scaling-stroke;
  transition:
    stroke var(--transition-smooth),
    filter var(--transition-smooth);
  animation: border-march 1.1s linear infinite;
}

label.dropzone:hover .dropzone-border-rect,
label.dropzone:focus-visible .dropzone-border-rect {
  stroke: var(--drop-accent);
  filter: drop-shadow(0 0 5px var(--drop-glow));
  animation-duration: 0.85s;
}

label.dropzone.dragover .dropzone-border-rect {
  stroke: var(--drop-accent);
  stroke-width: 2;
  stroke-dasharray: 11 5;
  filter: drop-shadow(0 0 10px var(--drop-glow-strong));
  animation-duration: 0.55s;
}

@keyframes border-march {
  to {
    stroke-dashoffset: -32;
  }
}

/* Drag-over background wash */
.dropzone-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  background: var(--surface);
  transition: background var(--transition-smooth);
}

label.dropzone:hover .dropzone-bg,
label.dropzone:focus-visible .dropzone-bg {
  background: linear-gradient(180deg, var(--surface-hover) 0%, var(--surface) 100%);
}

label.dropzone.dragover .dropzone-bg {
  background: linear-gradient(
    165deg,
    var(--drop-accent-soft) 0%,
    rgba(255, 255, 255, 0.97) 45%,
    var(--drop-accent-soft) 100%
  );
}

label.dropzone.dragover .dropzone-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 55% at 50% 45%, var(--drop-accent-mid), transparent 70%);
  opacity: 0.9;
  animation: drag-pulse 1.6s ease-in-out infinite;
}

@keyframes drag-pulse {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}

/* Inner content */
.dropzone-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: inherit;
  padding: 3.25rem 2rem;
  transition: transform var(--transition-smooth);
}

label.dropzone.dragover .dropzone-content {
  animation: content-lift 0.45s cubic-bezier(0.34, 1.4, 0.64, 1) forwards;
}

@keyframes content-lift {
  from {
    transform: translateY(6px) scale(0.985);
    opacity: 0.92;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

.dropzone-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 88px;
  height: 88px;
  margin-bottom: 1.5rem;
  background: linear-gradient(145deg, var(--bg) 0%, #fff 100%);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-secondary);
  box-shadow: var(--shadow-xs);
  transition:
    background var(--transition-smooth),
    border-color var(--transition-smooth),
    box-shadow var(--transition-smooth),
    transform var(--transition-smooth),
    color var(--transition-smooth);
}

label.dropzone:hover .dropzone-icon-wrap,
label.dropzone:focus-visible .dropzone-icon-wrap {
  border-color: rgba(106, 176, 76, 0.35);
  box-shadow:
    var(--shadow-sm),
    0 0 20px var(--drop-glow);
  color: var(--drop-accent);
  transform: translateY(-4px);
}

label.dropzone.dragover .dropzone-icon-wrap {
  background: linear-gradient(145deg, var(--drop-accent-soft) 0%, #fff 100%);
  border-color: var(--drop-accent);
  box-shadow:
    0 8px 24px var(--drop-accent-mid),
    0 0 28px var(--drop-glow);
  color: var(--drop-accent);
  animation: icon-bounce 0.7s cubic-bezier(0.34, 1.5, 0.64, 1) infinite alternate;
}

@keyframes icon-bounce {
  from {
    transform: translateY(-2px) scale(1);
  }
  to {
    transform: translateY(-8px) scale(1.06);
  }
}

.dropzone-icon {
  display: block;
}

.dropzone-icon .icon-arrow {
  transition: transform var(--transition-smooth);
  transform-origin: 26px 19px;
}

label.dropzone:hover .dropzone-icon .icon-arrow,
label.dropzone.dragover .dropzone-icon .icon-arrow {
  transform: translateY(-2px);
}

.dropzone-title {
  display: block;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 0.875rem;
  transition: color var(--transition-smooth);
}

label.dropzone.dragover .dropzone-title {
  color: #3d6b2a;
}

.dropzone-cta {
  display: block;
  margin-bottom: 0.75rem;
}

.dropzone-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow-xs);
  transition:
    background var(--transition-smooth),
    border-color var(--transition-smooth),
    box-shadow var(--transition-smooth),
    transform var(--transition-smooth),
    color var(--transition-smooth);
}

label.dropzone:hover .dropzone-cta-btn,
label.dropzone:focus-visible .dropzone-cta-btn {
  border-color: rgba(106, 176, 76, 0.45);
  box-shadow:
    var(--shadow-sm),
    0 0 16px var(--drop-glow);
  transform: translateY(-1px);
}

label.dropzone.dragover .dropzone-cta-btn {
  background: var(--drop-accent);
  border-color: var(--drop-accent);
  color: #fff;
  box-shadow: 0 4px 14px var(--drop-accent-mid);
}

.dropzone-hint {
  display: block;
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: color var(--transition-smooth);
}

label.dropzone.dragover .dropzone-hint {
  color: var(--text-secondary);
}

.format-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.75rem;
}

.format-badge {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border);
  border-radius: 999px;
  backdrop-filter: blur(4px);
  transition:
    background var(--transition-smooth),
    border-color var(--transition-smooth),
    transform var(--transition-smooth);
}

label.dropzone:hover .format-badge {
  border-color: var(--border-strong);
}

label.dropzone.dragover .format-badge {
  background: #fff;
  border-color: rgba(106, 176, 76, 0.35);
  transform: translateY(-2px);
}

@media (prefers-reduced-motion: reduce) {
  .dropzone-border-rect,
  label.dropzone.dragover .dropzone-icon-wrap,
  label.dropzone.dragover .dropzone-bg::after,
  label.dropzone.dragover .dropzone-content {
    animation: none;
  }

  .upload-shell:has(.dropzone.dragover),
  label.dropzone.dragover {
    transform: none;
  }
}

/* —— Card base —— */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

/* —— Controls —— */
.controls {
  max-width: var(--content);
  margin: 0 auto 2rem;
  padding: 1.75rem 1.75rem 1.5rem;
}

.controls-grid {
  display: grid;
  gap: 1.25rem;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  margin: 0;
}

.control-row > label:first-child {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  flex-shrink: 0;
}

.quality-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  min-width: 0;
  max-width: 280px;
}

.quality-wrap input[type="range"] {
  flex: 1;
  min-width: 0;
  height: 4px;
  accent-color: var(--accent);
  cursor: pointer;
}

.quality-value {
  font-size: 0.875rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  min-width: 2.75rem;
  text-align: right;
  color: var(--text-secondary);
}

select {
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239ca3af' d='M3 4.5L6 7.5L9 4.5'/%3E%3C/svg%3E") no-repeat right 0.65rem center;
  color: var(--text);
  min-width: 140px;
  max-width: 55%;
  cursor: pointer;
  appearance: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

select:hover {
  border-color: var(--border-strong);
}

select:focus {
  outline: none;
  border-color: var(--text-muted);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.controls-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

/* —— Buttons —— */
.btn {
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 0.7rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  touch-action: manipulation;
  transition:
    background var(--transition),
    color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-xs);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.btn-ghost {
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg);
  border-color: var(--border-strong);
  color: var(--text);
  transform: translateY(-1px);
}

.controls-actions .btn-primary {
  flex: 1;
  min-width: 140px;
}

/* —— Results list —— */
.results-section {
  max-width: var(--content);
  margin: 0 auto;
}

.results-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.file-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.file-card {
  list-style: none;
}

.file-card--result {
  animation: card-in 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition:
    box-shadow var(--transition-smooth),
    transform var(--transition-smooth),
    border-color var(--transition-smooth);
}

.file-card--result:hover .result-card {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

.result-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.25rem 0;
}

.result-name {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.saved-pill {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #2d6a3e;
  background: var(--success-soft);
  border: 1px solid rgba(5, 150, 105, 0.2);
  border-radius: 999px;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(5, 150, 105, 0.12);
}

.saved-pill--neutral {
  color: var(--text-secondary);
  background: var(--bg);
  border-color: var(--border);
  box-shadow: none;
}

.saved-pill--warn {
  color: #b45309;
  background: #fffbeb;
  border-color: #fcd34d;
  box-shadow: none;
}

.result-note {
  margin: 0 1.25rem 0.75rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  background: var(--bg);
  border-radius: var(--radius-sm);
}

.compare-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.75rem;
  align-items: stretch;
  padding: 0 1.25rem 1rem;
}

.compare-pane {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}

.compare-tag {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.compare-tag--accent {
  color: var(--drop-accent);
}

.compare-img-wrap {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg);
  border: 1px solid var(--border);
}

.compare-after .compare-img-wrap {
  border-color: rgba(106, 176, 76, 0.35);
  box-shadow: 0 0 0 1px rgba(106, 176, 76, 0.08);
}

.compare-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-smooth);
}

.file-card--result:hover .compare-img-wrap img {
  transform: scale(1.03);
}

.compare-size {
  font-size: 0.8125rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

.compare-size--accent {
  color: #2d6a3e;
}

.compare-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  width: 36px;
  height: 36px;
  color: var(--text-muted);
  background: var(--bg);
  border-radius: 50%;
  border: 1px solid var(--border);
}

.size-compare {
  padding: 0 1.25rem 1rem;
}

.size-compare-track {
  display: block;
  position: relative;
  height: 8px;
  background: var(--bg-subtle);
  border-radius: 999px;
  overflow: hidden;
}

.size-compare-before {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background: var(--border-strong);
  border-radius: 999px;
  opacity: 0.45;
}

.size-compare-after {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--drop-accent), #8bc976);
  border-radius: 999px;
  min-width: 4px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.size-compare-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 0.4rem;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.result-footer {
  border-top: 1px solid var(--border);
  padding: 1rem 1.25rem 1.25rem;
  background: linear-gradient(180deg, transparent, rgba(243, 244, 246, 0.5));
}

.result-stats-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin-bottom: 1rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.result-stats-inline em {
  font-style: normal;
  font-weight: 500;
  color: var(--text-muted);
  margin-right: 0.35rem;
}

.result-stats-saved {
  font-weight: 600;
  color: var(--success);
}

.result-stats-saved em {
  color: var(--success);
  opacity: 0.75;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.result-actions .btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  flex: 1;
  min-width: 120px;
}

.result-card--pending {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.file-card:hover .result-card--pending {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.pending-row {
  display: flex;
  gap: 1rem;
  padding: 1.25rem;
  align-items: center;
}

.pending-preview {
  position: relative;
  flex-shrink: 0;
  width: 88px;
  height: 88px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg);
  border: 1px solid var(--border);
}

.pending-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.pending-preview.is-processing img {
  opacity: 0.55;
}

.pending-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.65);
}

.pending-spinner {
  width: 28px;
  height: 28px;
  border: 2.5px solid var(--border);
  border-top-color: var(--drop-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.pending-body {
  flex: 1;
  min-width: 0;
}

.pending-meta {
  margin: 0.35rem 0 0.875rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.pending-meta--error {
  color: var(--error);
}

.pending-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* —— SEO content —— */
.seo-content {
  max-width: var(--content);
  margin: 4rem auto 0;
  padding-top: 3rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.seo-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--transition-smooth);
}

.seo-block:hover {
  box-shadow: var(--shadow-sm);
}

.seo-block h2 {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 0.875rem;
}

.seo-block p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 0.875rem;
}

.seo-block p:last-child,
.seo-block ol:last-child,
.seo-block ul:last-child {
  margin-bottom: 0;
}

.seo-block strong {
  font-weight: 600;
  color: var(--text);
}

.seo-steps,
.seo-list {
  margin: 0 0 0.875rem 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.seo-steps li,
.seo-list li {
  margin-bottom: 0.5rem;
}

.seo-steps li:last-child,
.seo-list li:last-child {
  margin-bottom: 0;
}

/* —— Footer —— */
.footer {
  max-width: var(--content);
  margin: 2.5rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

/* —— Responsive —— */
@media (max-width: 640px) {
  .app {
    padding: 0 1rem calc(2rem + var(--safe-bottom));
  }

  .hero-fold {
    min-height: min(100dvh, 820px);
    padding: 1.5rem 0 2rem;
  }

  .header {
    margin-bottom: 1.5rem;
  }

  .seo-content {
    margin-top: 2.5rem;
    padding-top: 2rem;
  }

  .seo-block {
    padding: 1.25rem 1.25rem;
  }

  .header h1 {
    font-size: 1.625rem;
  }

  .subtitle {
    font-size: 0.9375rem;
  }

  label.dropzone {
    min-height: 300px;
  }

  .dropzone-content {
    padding: 2.5rem 1.25rem;
  }

  .dropzone-icon-wrap {
    width: 72px;
    height: 72px;
    margin-bottom: 1.25rem;
  }

  .dropzone-title {
    font-size: 1.125rem;
  }

  .controls {
    padding: 1.25rem;
  }

  .control-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .quality-wrap {
    max-width: none;
  }

  select {
    max-width: 100%;
    width: 100%;
  }

  .controls-actions {
    flex-direction: column;
  }

  .controls-actions .btn {
    width: 100%;
  }

  .compare-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .compare-arrow {
    justify-self: center;
    transform: rotate(90deg);
  }

  .result-header {
    flex-direction: column;
    align-items: stretch;
  }

  .saved-pill {
    align-self: flex-start;
  }

  .result-actions {
    flex-direction: column;
  }

  .result-actions .btn {
    width: 100%;
  }

  .pending-row {
    flex-direction: column;
    align-items: stretch;
  }

  .pending-preview {
    width: 100%;
    height: 140px;
  }
}

@media (min-width: 768px) {
  .controls-grid {
    grid-template-columns: 1fr 1fr;
  }

  .control-row:first-child {
    grid-column: 1 / -1;
  }

  label.dropzone {
    min-height: 380px;
  }

  .dropzone-content {
    padding: 4rem 2.5rem;
  }
}

@media (min-width: 1024px) {
  .hero-fold {
    min-height: 100dvh;
    padding: 2.5rem 0 3rem;
  }

  .brand-mark {
    margin-bottom: 1.5rem;
  }
}