:root {
  --font-display: "Outfit", "Segoe UI Variable Display", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI Variable Text", "Segoe UI", sans-serif;
}

body {
  font-family: var(--font-body);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
}

.tool-hero {
  max-width: 820px;
}

.tool-hero h1 {
  max-width: 14ch;
}

.upload-panel {
  margin-bottom: clamp(1rem, 3vw, 1.75rem);
}

.compact-heading {
  margin-bottom: 1rem;
}

.drop-zone {
  min-height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.9rem;
  border: 2px dashed color-mix(in srgb, var(--green) 60%, var(--border));
  border-radius: 20px;
  padding: clamp(1.2rem, 4vw, 2.2rem);
  background: color-mix(in srgb, var(--green-soft) 48%, var(--surface));
  text-align: center;
  transition: border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.drop-zone.is-dragging {
  border-color: var(--green);
  background: var(--green-soft);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--green) 16%, transparent);
}

.drop-zone > svg {
  width: 46px;
  height: 46px;
  color: var(--green);
}

:root[data-theme="dark"] .drop-zone > svg {
  color: #9ee4c2;
}

.drop-zone > div {
  display: grid;
  gap: 0.18rem;
}

.drop-zone strong {
  color: var(--heading);
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.drop-zone span {
  color: var(--muted);
  font-size: 0.9rem;
}

.drop-zone .button {
  margin-top: 0.2rem;
}

.file-rules {
  margin-top: 0.75rem;
  text-align: center;
}

.image-tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1.05fr);
  align-items: start;
  gap: clamp(1rem, 3vw, 1.75rem);
}

.settings-panel:only-child {
  grid-column: 1 / -1;
  width: min(100%, 680px);
}

.original-panel,
.settings-panel,
.result-panel {
  scroll-margin-top: 1rem;
}

fieldset {
  min-width: 0;
  margin: 0;
  border: 0;
  padding: 0;
}

fieldset:disabled {
  opacity: 0.58;
}

fieldset:disabled button,
fieldset:disabled input,
fieldset:disabled select {
  cursor: not-allowed;
}

.preview-frame {
  width: 100%;
  min-height: 300px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  padding: 0.75rem;
  background:
    linear-gradient(45deg, var(--surface-quiet) 25%, transparent 25%),
    linear-gradient(-45deg, var(--surface-quiet) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--surface-quiet) 75%),
    linear-gradient(-45deg, transparent 75%, var(--surface-quiet) 75%),
    var(--surface);
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  background-size: 24px 24px;
}

.preview-frame img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: min(56vh, 520px);
  border-radius: 10px;
  box-shadow: 0 18px 38px -24px rgba(0, 0, 0, 0.62);
}

.image-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 0.8rem 0 0;
}

.image-facts div,
.comparison-list div {
  min-width: 0;
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  padding: 0.8rem;
  background: var(--surface-quiet);
}

.image-facts dt,
.comparison-list dt {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.image-facts dd,
.comparison-list dd {
  margin: 0.25rem 0 0;
  overflow-wrap: anywhere;
  color: var(--heading);
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
}

.size-fields {
  align-items: end;
}

.ratio-control {
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0;
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  padding: 0.65rem 0.8rem;
  background: var(--surface-quiet);
  cursor: pointer;
}

.ratio-control input {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  accent-color: var(--green);
}

.ratio-control span {
  display: grid;
  gap: 0.05rem;
}

.ratio-control strong {
  color: var(--text);
  font-size: 0.88rem;
}

.ratio-control small {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 500;
}

.field-error {
  min-height: 1.2rem;
  margin: -0.45rem 0 0;
  color: var(--danger);
  font-size: 0.8rem;
  font-weight: 750;
}

.quality-slider {
  width: 100%;
  min-height: 50px;
  margin: 0;
  accent-color: var(--green);
  cursor: pointer;
}

.quality-slider:disabled {
  cursor: not-allowed;
}

#quality-value {
  display: inline-block;
  min-width: 3.2rem;
  margin-left: 0.2rem;
  color: var(--green);
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 0.78rem;
}

:root[data-theme="dark"] #quality-value {
  color: #9ee4c2;
}

.result-panel {
  margin-top: clamp(1rem, 3vw, 1.75rem);
}

.result-heading {
  margin-bottom: 1rem;
}

.result-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
  align-items: center;
  gap: clamp(1rem, 3vw, 1.5rem);
}

.result-frame {
  min-height: 340px;
}

.comparison-list {
  display: grid;
  gap: 0.7rem;
  margin: 0;
}

.comparison-list .savings-row {
  border-color: color-mix(in srgb, var(--green) 40%, var(--border-soft));
  background: var(--green-soft);
}

.comparison-list .savings-row dd {
  color: var(--green);
}

:root[data-theme="dark"] .comparison-list .savings-row dd {
  color: #9ee4c2;
}

.comparison-list .savings-row.is-larger {
  border-color: color-mix(in srgb, var(--danger) 42%, var(--border-soft));
  background: color-mix(in srgb, var(--danger) 10%, var(--surface));
}

.comparison-list .savings-row.is-larger dd {
  color: var(--danger);
}

.download-button {
  width: 100%;
  margin-top: 0.85rem;
}

.jpeg-note {
  min-height: 1.2rem;
  margin-top: 0.65rem;
  text-align: center;
}

@media (max-width: 820px) {
  .image-tool-grid,
  .result-layout {
    grid-template-columns: 1fr;
  }

  .settings-panel:only-child {
    width: auto;
  }

  .result-frame {
    min-height: 280px;
  }
}

@media (max-width: 560px) {
  .drop-zone {
    min-height: 200px;
    border-radius: 16px;
  }

  .drop-zone .button {
    width: min(100%, 260px);
  }

  .preview-frame,
  .result-frame {
    min-height: 220px;
    padding: 0.5rem;
  }

  .image-facts {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .drop-zone {
    transition: none;
  }
}