:root {
  color-scheme: light;
  --paper: #f2efe7;
  --surface: #fbfaf6;
  --surface-2: #e9e5da;
  --ink: #191b18;
  --muted: #696b64;
  --line: #cbc8bd;
  --line-strong: #9d9e96;
  --acid: #b8f34a;
  --acid-dark: #568900;
  --cyan: #55cdbd;
  --cyan-soft: #d9f5ef;
  --coral: #ff735f;
  --coral-soft: #ffe0da;
  --amber: #f4c753;
  --amber-soft: #fff0c5;
  --shadow: 0 18px 45px rgba(35, 36, 31, 0.08);
  --sans: "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", Inter, system-ui, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

[data-theme="dark"] {
  color-scheme: dark;
  --paper: #171916;
  --surface: #20231f;
  --surface-2: #2a2e29;
  --ink: #f3f0e7;
  --muted: #a9aca3;
  --line: #3a3f38;
  --line-strong: #636960;
  --acid-dark: #b8f34a;
  --cyan-soft: #163f39;
  --coral-soft: #4a2520;
  --amber-soft: #443818;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  text-rendering: optimizeLegibility;
}

button,
textarea,
select,
input {
  font: inherit;
}

button,
label[for] {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
textarea:focus-visible,
select:focus-visible,
label[for]:focus-within,
.diff-body:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--acid) 70%, transparent);
  outline-offset: 2px;
}

button {
  color: inherit;
}

svg {
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.app-header {
  height: 76px;
  padding: 0 clamp(20px, 4vw, 64px);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
}

.brand {
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--ink);
  font: 800 11px/1 var(--mono);
  overflow: hidden;
}

.brand-mark span {
  display: grid;
  place-items: center;
}

.brand-mark span:first-child {
  background: var(--ink);
  color: var(--paper);
}

.brand-mark span:last-child {
  background: var(--acid);
  color: #19210d;
}

.brand-name {
  font: 800 15px/1 var(--mono);
  letter-spacing: 0.08em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.privacy-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.privacy-note svg {
  width: 15px;
  height: 15px;
  color: var(--acid-dark);
  fill: currentColor;
  stroke: none;
}

.lang-switch {
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  display: flex;
  gap: 2px;
}

.lang-switch button {
  min-width: 34px;
  height: 30px;
  padding: 0 9px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: 800 11px/1 var(--mono);
  letter-spacing: 0.06em;
  cursor: pointer;
}

.lang-switch button:hover {
  color: var(--ink);
}

.lang-switch button.active {
  background: var(--ink);
  color: var(--paper);
}

.icon-button {
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  display: grid;
  place-items: center;
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--ink);
}

.icon-button svg {
  width: 18px;
  height: 18px;
}

.page-shell {
  width: min(1480px, calc(100% - clamp(28px, 6vw, 96px)));
  margin: 0 auto;
}

.hero {
  min-height: 340px;
  padding: clamp(58px, 8vw, 110px) 0 54px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  align-items: end;
  gap: 60px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--muted);
  font: 700 11px/1.2 var(--mono);
  letter-spacing: 0.12em;
}

.eyebrow span {
  color: var(--acid-dark);
}

.hero h1 {
  margin: 0;
  max-width: 900px;
  font-size: clamp(36px, 4.4vw, 64px);
  line-height: 1.03;
  letter-spacing: -0.055em;
  word-break: keep-all;
}

.hero h1 em {
  color: var(--acid-dark);
  font-style: normal;
}

.hero-copy {
  padding-bottom: 5px;
}

.hero-copy > p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  word-break: keep-all;
}

.format-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.format-row span {
  padding: 5px 7px;
  border: 1px solid var(--line-strong);
  font: 700 9px/1 var(--mono);
  letter-spacing: 0.07em;
}

.format-row span:last-child {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.compare-workspace {
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.input-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 50px minmax(0, 1fr);
  align-items: stretch;
  background: var(--line);
  gap: 1px;
}

.file-panel {
  min-width: 0;
  min-height: 390px;
  padding: 24px;
  background: var(--surface);
  position: relative;
  overflow: hidden;
}

.file-panel[data-side="left"] {
  box-shadow: inset 0 0 0 2px var(--acid-dark);
}

.file-panel[data-side="right"] {
  box-shadow: inset 0 0 0 2px var(--coral);
}

.panel-kicker,
.file-title-row,
.file-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.panel-kicker {
  margin-bottom: 20px;
}

.side-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 800 11px/1 var(--mono);
  letter-spacing: 0.12em;
}

.side-label::before {
  content: "";
  width: 8px;
  height: 8px;
  background: currentColor;
}

.side-label.source {
  color: var(--acid-dark);
}

.side-label.target {
  color: #c84c3b;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.text-button {
  padding: 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: none;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}

.text-button.muted {
  color: var(--muted);
}

.file-title-row {
  min-height: 48px;
  margin-bottom: 14px;
}

.file-title-row > div {
  min-width: 0;
  display: grid;
  gap: 5px;
}

.file-title-row strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: 700 14px/1.2 var(--mono);
}

.file-title-row span {
  color: var(--muted);
  font-size: 11px;
}

.file-picker {
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: var(--paper);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
}

.file-picker:hover {
  border-color: var(--ink);
  background: var(--acid);
  color: #19210d;
}

.file-picker svg {
  width: 15px;
  height: 15px;
}

.file-panel textarea {
  width: 100%;
  height: 236px;
  padding: 16px 18px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  font: 12px/1.65 var(--mono);
  tab-size: 2;
  white-space: pre;
  overflow: auto;
}

.image-preview {
  margin: 0 0 12px;
}

.image-preview[hidden] {
  display: none;
}

.image-preview > div {
  height: 236px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background-color: var(--paper);
  background-image:
    linear-gradient(45deg, color-mix(in srgb, var(--line) 40%, transparent) 25%, transparent 25%),
    linear-gradient(-45deg, color-mix(in srgb, var(--line) 40%, transparent) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, color-mix(in srgb, var(--line) 40%, transparent) 75%),
    linear-gradient(-45deg, transparent 75%, color-mix(in srgb, var(--line) 40%, transparent) 75%);
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  background-size: 16px 16px;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.image-preview img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  -webkit-user-drag: none;
  user-select: none;
  pointer-events: none;
}

.image-preview figcaption {
  margin-top: 7px;
  color: var(--muted);
  font: 10px/1.4 var(--mono);
  text-align: right;
}

.file-panel.image-mode textarea {
  height: 116px;
  min-height: 88px;
}

.file-panel textarea::placeholder {
  color: var(--muted);
}

.file-footer {
  margin-top: 12px;
  color: var(--muted);
  font-size: 10px;
}

.file-footer label {
  display: flex;
  align-items: center;
  gap: 8px;
}

select {
  min-height: 30px;
  padding: 4px 28px 4px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-size: 11px;
}

select:disabled {
  opacity: 0.58;
  cursor: not-allowed;
}

.check-control input:disabled + span,
.sort-control:has(select:disabled) {
  opacity: 0.48;
}

.swap-button {
  align-self: center;
  justify-self: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface);
  display: grid;
  place-items: center;
  position: relative;
  z-index: 2;
  cursor: pointer;
}

.swap-button:hover {
  background: var(--acid);
  color: #19210d;
  border-color: #19210d;
  transform: rotate(180deg);
}

.swap-button,
.swap-button:hover {
  transition: transform 220ms ease, background 150ms ease;
}

.swap-button svg {
  width: 18px;
  height: 18px;
}

.drop-overlay {
  position: absolute;
  inset: 12px;
  z-index: 5;
  border: 2px dashed var(--acid-dark);
  background: color-mix(in srgb, var(--surface) 94%, var(--acid));
  display: none;
  place-content: center;
  text-align: center;
}

.drop-overlay strong {
  font-size: 24px;
}

.drop-overlay span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
}

.file-panel.dragging .drop-overlay {
  display: grid;
}

.compare-controls {
  min-height: 96px;
  padding: 18px 24px;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.option-list {
  margin: 0;
  padding: 0;
  border: 0;
  display: flex;
  align-items: center;
  gap: 22px;
}

.option-list legend {
  float: left;
  margin-right: 8px;
  font: 800 11px/1 var(--mono);
  letter-spacing: 0.08em;
}

.check-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
  cursor: pointer;
  white-space: nowrap;
}

.check-control input {
  appearance: none;
  width: 17px;
  height: 17px;
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--surface);
  display: grid;
  place-content: center;
}

.check-control input::before {
  content: "";
  width: 9px;
  height: 5px;
  border-left: 2px solid #19210d;
  border-bottom: 2px solid #19210d;
  transform: rotate(-45deg) scale(0);
  transition: transform 100ms ease;
}

.check-control input:checked {
  background: var(--acid);
  border-color: #4d7114;
}

.check-control input:checked::before {
  transform: rotate(-45deg) scale(1);
}

.sort-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  white-space: nowrap;
}

.sort-control select {
  min-width: 112px;
  background: var(--surface);
}

.primary-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.primary-actions > span {
  color: var(--muted);
  font-size: 10px;
}

kbd {
  padding: 2px 5px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--surface);
  font: inherit;
}

.compare-button {
  min-width: 190px;
  min-height: 50px;
  padding: 0 19px;
  border: 1px solid #19210d;
  border-radius: 8px;
  background: var(--acid);
  color: #19210d;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-size: 14px;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 4px 4px 0 #19210d;
}

.compare-button:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 #19210d;
}

.compare-button:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

.compare-button svg {
  width: 20px;
  height: 20px;
}

.results-section {
  padding: 84px 0 60px;
}

.results-topline {
  margin-bottom: 28px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.results-topline h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1;
  letter-spacing: -0.05em;
}

.result-state {
  padding-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 13px;
}

.result-dot {
  width: 10px;
  height: 10px;
  background: var(--coral);
  border-radius: 50%;
  box-shadow: 0 0 0 5px var(--coral-soft);
}

.result-state.identical .result-dot {
  background: var(--acid-dark);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--acid) 30%, transparent);
}

.stats-grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.stat-cell {
  min-width: 0;
  min-height: 116px;
  padding: 19px 22px;
  border-right: 1px solid var(--line);
  display: grid;
  align-content: space-between;
  gap: 4px;
}

.stat-cell:last-child {
  border-right: 0;
}

.stat-cell span,
.stat-cell small {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
}

.stat-cell strong {
  font: 700 34px/1 var(--mono);
  letter-spacing: -0.05em;
}

.stat-cell.added strong {
  color: var(--acid-dark);
}

.stat-cell.changed strong {
  color: #b47700;
}

.stat-cell.removed strong {
  color: #cf4837;
}

.meter {
  width: 100%;
  height: 5px;
  margin-top: 9px;
  background: var(--surface-2);
  overflow: hidden;
}

.meter i {
  display: block;
  height: 100%;
  background: var(--acid-dark);
  transition: width 250ms ease;
}

.result-toolbar {
  min-height: 64px;
  padding: 12px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.segmented {
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
}

.segmented button {
  min-height: 31px;
  padding: 0 13px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
}

.segmented button.active {
  background: var(--ink);
  color: var(--paper);
}

.toolbar-spacer {
  flex: 1;
}

.compact-field {
  margin-right: 4px;
  color: var(--muted);
  font-size: 10px;
}

.compact-field select {
  margin-left: 5px;
}

.diff-position {
  min-width: 64px;
  min-height: 36px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--muted);
  display: inline-grid;
  place-items: center;
  font: 800 11px/1 var(--mono);
}

.diff-position.has-current {
  border-color: #191b18;
  background: #191b18;
  color: #b8f34a;
}

.tool-button,
.secondary-button {
  min-height: 36px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
}

.tool-button:hover,
.secondary-button:hover {
  border-color: var(--ink);
}

.tool-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.tool-button svg,
.secondary-button svg {
  width: 15px;
  height: 15px;
}

.image-diff-panel {
  min-height: 190px;
  margin-bottom: 14px;
  padding: 20px 24px;
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  display: grid;
  grid-template-columns: minmax(220px, 0.6fr) minmax(260px, 1.4fr);
  align-items: center;
  gap: 28px;
}

.image-diff-panel[hidden] {
  display: none;
}

.image-diff-panel > div {
  display: grid;
  gap: 8px;
}

.image-diff-panel span {
  color: var(--coral);
  font: 800 9px/1 var(--mono);
  letter-spacing: 0.12em;
}

.image-diff-panel strong {
  font-size: 22px;
}

.image-diff-panel p {
  margin: 0;
  color: var(--muted);
  font: 11px/1.65 var(--mono);
}

.image-diff-panel figure {
  height: 150px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 7px;
  background-color: var(--paper);
  background-image:
    linear-gradient(45deg, color-mix(in srgb, var(--line) 42%, transparent) 25%, transparent 25%),
    linear-gradient(-45deg, color-mix(in srgb, var(--line) 42%, transparent) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, color-mix(in srgb, var(--line) 42%, transparent) 75%),
    linear-gradient(-45deg, transparent 75%, color-mix(in srgb, var(--line) 42%, transparent) 75%);
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  background-size: 16px 16px;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.image-diff-panel img {
  display: block;
  width: auto;
  height: 100%;
  max-width: 100%;
  object-fit: contain;
  image-rendering: pixelated;
  -webkit-user-drag: none;
  user-select: none;
  pointer-events: none;
}

.diff-frame {
  border: 1px solid var(--line-strong);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.diff-head {
  min-height: 48px;
  border-bottom: 1px solid var(--line-strong);
  background: var(--surface-2);
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.diff-head > div {
  min-width: 0;
  padding: 0 18px;
  display: flex;
  align-items: center;
  gap: 9px;
  font: 700 11px/1 var(--mono);
}

.diff-head > div:first-child {
  border-right: 1px solid var(--line-strong);
}

.diff-head strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-dot,
.target-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
}

.source-dot {
  background: var(--acid-dark);
}

.target-dot {
  background: var(--coral);
}

.diff-body {
  height: min(64vh, 720px);
  min-height: 360px;
  overflow: auto;
  position: relative;
  background: var(--surface);
}

#diffRows {
  min-width: 780px;
  padding-right: 12px;
}

.diff-row {
  min-height: 26px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 55%, transparent);
  font: 11px/1.55 var(--mono);
  scroll-margin-block: 100px;
}

.diff-row .code-side:first-child {
  border-right: 1px solid var(--line);
}

.code-side {
  min-width: 0;
  display: grid;
  grid-template-columns: 48px 1fr;
  position: relative;
}

.line-number {
  padding: 4px 10px 4px 4px;
  border-right: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
  color: var(--muted);
  text-align: right;
  user-select: none;
}

.line-content {
  min-width: 0;
  min-height: 26px;
  padding: 4px 12px;
  white-space: pre;
  overflow: hidden;
  text-overflow: ellipsis;
  tab-size: 2;
}

.diff-row.equal:hover .code-side {
  background: color-mix(in srgb, var(--surface-2) 55%, transparent);
}

.diff-row.added .code-side:last-child,
.diff-row.changed .code-side:last-child {
  background: var(--cyan-soft);
}

.diff-row.removed .code-side:first-child,
.diff-row.changed .code-side:first-child {
  background: var(--coral-soft);
}

.diff-row.added .code-side:last-child::before,
.diff-row.removed .code-side:first-child::before,
.diff-row.changed .code-side::before {
  content: "";
  width: 3px;
  position: absolute;
  inset: 0 auto 0 0;
}

.diff-row.added .code-side:last-child::before {
  background: var(--cyan);
}

.diff-row.removed .code-side:first-child::before,
.diff-row.changed .code-side:first-child::before {
  background: var(--coral);
}

.diff-row.changed .code-side:last-child::before {
  background: var(--amber);
}

.inline-change {
  padding: 1px 0;
  border-bottom: 2px solid currentColor;
  background: color-mix(in srgb, currentColor 12%, transparent);
}

.diff-row.changed .code-side:first-child .inline-change {
  color: #b82d20;
}

.diff-row.changed .code-side:last-child .inline-change {
  color: #7b5900;
}

.diff-row.active,
.unified-row.active {
  outline: 3px solid #191b18;
  outline-offset: -3px;
  box-shadow: 0 0 0 2px #b8f34a;
  position: relative;
  z-index: 2;
}

.diff-row.active .line-number,
.unified-row.active .line-number {
  background: #191b18;
  color: #b8f34a;
  font-weight: 900;
}

.diff-row.active::after,
.unified-row.active::after {
  content: "현재";
  padding: 3px 7px;
  border: 1px solid #b8f34a;
  background: #191b18;
  color: #b8f34a;
  position: absolute;
  top: 3px;
  right: 7px;
  z-index: 3;
  font: 900 9px/1 var(--sans);
  letter-spacing: 0.04em;
  pointer-events: none;
}

.diff-gap {
  min-width: 780px;
  height: 30px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: 10px/1 var(--mono);
  letter-spacing: 0.04em;
}

.diff-gap::before,
.diff-gap::after {
  content: "";
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 7px 0 currentColor, -7px 0 currentColor;
}

.empty-result {
  height: 100%;
  min-height: 360px;
  padding: 40px;
  display: grid;
  place-content: center;
  text-align: center;
}

.empty-result strong {
  font-size: 24px;
}

.empty-result p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.diff-map {
  width: 10px;
  position: sticky;
  right: 0;
  top: 0;
  float: right;
  height: 100%;
  min-height: 360px;
  margin-top: calc(-1 * min(64vh, 720px));
  background: color-mix(in srgb, var(--surface-2) 76%, transparent);
  pointer-events: none;
}

.map-mark {
  width: 100%;
  min-height: 3px;
  position: absolute;
  left: 0;
}

.map-mark.added {
  background: var(--cyan);
}

.map-mark.changed {
  background: var(--amber);
}

.map-mark.removed {
  background: var(--coral);
}

.unified-head {
  grid-template-columns: 1fr;
}

.unified-head > div:first-child {
  border-right: 0;
}

.unified-head > div:last-child {
  display: none;
}

.unified-row {
  display: block;
  border-bottom: 1px solid var(--line);
  scroll-margin-block: 100px;
}

.unified-line {
  min-height: 26px;
  display: grid;
  grid-template-columns: 48px 48px 24px 1fr;
  font: 11px/1.55 var(--mono);
}

.unified-line .line-number {
  padding-right: 8px;
}

.unified-line .prefix {
  padding: 4px 5px;
  color: var(--muted);
  text-align: center;
}

.unified-line .line-content {
  padding-left: 5px;
}

.unified-line.added {
  background: var(--cyan-soft);
}

.unified-line.removed {
  background: var(--coral-soft);
}

.result-footer {
  min-height: 76px;
  padding-top: 18px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.result-footer p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.result-footer > div {
  display: flex;
  gap: 8px;
}

.secondary-button {
  min-height: 40px;
  padding-inline: 14px;
}

.secondary-button.dark {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.how-it-works {
  padding: 80px 0 110px;
  border-top: 1px solid var(--line);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
}

.feature-grid article {
  min-height: 230px;
  padding: 28px 32px 20px 0;
  border-right: 1px solid var(--line);
}

.feature-grid article + article {
  padding-left: 32px;
}

.feature-grid article:last-child {
  border-right: 0;
}

.feature-grid article > span {
  color: var(--acid-dark);
  font: 700 11px/1 var(--mono);
}

.feature-grid h3 {
  margin: 48px 0 10px;
  font-size: 20px;
  letter-spacing: -0.025em;
}

.feature-grid p {
  max-width: 340px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  word-break: keep-all;
}

.site-footer {
  min-height: 150px;
  padding: 34px clamp(20px, 4vw, 64px);
  border-top: 1px solid var(--line-strong);
  background: var(--ink);
  color: var(--paper);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
}

.site-footer > p {
  margin: 0;
  color: var(--acid);
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.12em;
}

.site-footer > span {
  justify-self: end;
  color: color-mix(in srgb, var(--paper) 62%, transparent);
  font-size: 11px;
}

.footer-brand .brand-mark {
  border-color: var(--paper);
}

.footer-brand .brand-mark span:first-child {
  background: var(--paper);
  color: var(--ink);
}

.toast {
  max-width: min(420px, calc(100vw - 32px));
  padding: 12px 16px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--ink);
  color: var(--paper);
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 50;
  font-size: 12px;
  font-weight: 750;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity 150ms ease, transform 150ms ease;
  box-shadow: var(--shadow);
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1060px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-copy {
    max-width: 680px;
  }

  .input-grid {
    grid-template-columns: 1fr;
  }

  .swap-button {
    margin: -20px auto;
    transform: rotate(90deg);
  }

  .swap-button:hover {
    transform: rotate(270deg);
  }

  .compare-controls {
    align-items: flex-start;
  }

  .option-list {
    flex-wrap: wrap;
  }

  .option-list legend {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: 2fr repeat(2, 1fr);
  }

  .stat-cell {
    border-bottom: 1px solid var(--line);
  }

  .stat-cell:nth-child(3) {
    border-right: 0;
  }

  .stat-cell.total {
    grid-column: span 2;
    border-bottom: 0;
  }
}

@media (max-width: 720px) {
  .app-header {
    height: 64px;
    padding-inline: 18px;
  }

  .brand-name,
  .privacy-note {
    display: none;
  }

  .page-shell {
    width: min(100% - 28px, 1480px);
  }

  .hero {
    min-height: auto;
    padding: 52px 0 42px;
  }

  .hero h1 {
    max-width: 100%;
    font-size: clamp(30px, 8.2vw, 36px);
    letter-spacing: -0.045em;
    overflow-wrap: anywhere;
  }

  .hero-copy > p {
    word-break: normal;
    overflow-wrap: anywhere;
  }

  .file-panel {
    padding: 18px;
  }

  .panel-kicker {
    flex-wrap: wrap;
  }

  .file-title-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .file-picker {
    align-self: flex-start;
  }

  .file-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .compare-controls,
  .primary-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .primary-actions > span {
    display: none;
  }

  .option-list {
    gap: 15px;
  }

  .check-control {
    width: calc(50% - 8px);
  }

  .sort-control {
    width: 100%;
  }

  .image-diff-panel {
    grid-template-columns: 1fr;
    padding: 18px;
    gap: 16px;
  }

  .results-topline {
    align-items: flex-start;
    flex-direction: column;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .stat-cell:first-child {
    grid-column: span 2;
    border-right: 0;
  }

  .stat-cell:nth-child(3) {
    border-right: 0;
  }

  .stat-cell.total {
    grid-column: span 2;
  }

  .result-toolbar {
    flex-wrap: wrap;
  }

  .toolbar-spacer {
    display: none;
  }

  .compact-field {
    margin-left: auto;
  }

  .tool-button {
    flex: 1;
    justify-content: center;
  }

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

  .result-footer > div,
  .secondary-button {
    width: 100%;
  }

  .secondary-button {
    justify-content: center;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid article,
  .feature-grid article + article {
    min-height: 180px;
    padding: 24px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .feature-grid article:last-child {
    border-bottom: 0;
  }

  .feature-grid h3 {
    margin-top: 28px;
  }

  .site-footer {
    grid-template-columns: 1fr auto;
  }

  .site-footer > p {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}