:root {
  color-scheme: light;
  --bg: #eff0eb;
  --surface: #fffefa;
  --surface-strong: #ffffff;
  --ink: #111111;
  --muted: #626a5d;
  --line: #d9dfd0;
  --logo-green: #80a24d;
  --logo-green-light: #99cc66;
  --accent: #5f7a38;
  --accent-strong: #35471e;
  --accent-soft: #edf5e7;
  --added: #2f7d32;
  --added-soft: #edf8ed;
  --removed: #b2452c;
  --removed-soft: #fff0ea;
  --changed: #8a6418;
  --changed-soft: #fff7df;
  --equal: #496076;
  --equal-soft: #edf4fa;
  --shadow: 0 18px 45px rgba(35, 42, 32, 0.11);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(135deg, rgba(128, 162, 77, 0.18), transparent 34%),
    linear-gradient(225deg, rgba(153, 204, 102, 0.13), transparent 30%),
    var(--bg);
  color: var(--ink);
}

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

.app-shell {
  width: min(1480px, calc(100vw - 32px));
  min-height: calc(100vh - 32px);
  margin: 16px auto;
  display: grid;
  grid-template-rows: auto auto auto auto minmax(320px, 1fr) minmax(220px, 0.65fr) auto;
  gap: 14px;
}

.top-bar,
.control-panel,
.diff-panel,
.editor-pane {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.86);
  box-shadow: var(--shadow);
}

.top-bar {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px;
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-logo {
  width: 72px;
  height: 72px;
  flex: 0 0 auto;
  object-fit: contain;
  filter: drop-shadow(0 8px 14px rgba(35, 42, 32, 0.14));
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.65rem, 2.6vw, 2.45rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.action-bar {
  position: relative;
  z-index: 4;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.file-input {
  display: none;
}

.tools-menu {
  position: relative;
}

.tools-menu summary {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
  transition:
    border-color 120ms ease,
    background 120ms ease;
}

.tools-menu summary::-webkit-details-marker {
  display: none;
}

.tools-menu summary::after {
  content: "";
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}

.tools-menu[open] summary {
  border-color: rgba(128, 162, 77, 0.6);
  background: var(--accent-soft);
}

.tools-menu-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 10;
  min-width: 190px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  box-shadow: var(--shadow);
}

.tools-menu-list a {
  display: block;
  padding: 11px 12px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
}

.tools-menu-list a + a {
  border-top: 1px solid var(--line);
}

.tools-menu-list a:hover,
.tools-menu-list a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.control-panel {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(460px, auto);
  gap: 12px;
  padding: 12px;
  background: rgba(255, 253, 248, 0.78);
  backdrop-filter: blur(14px);
}

.control-group {
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
}

.control-group-title {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.control-row {
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.field-label {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

select,
button {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--ink);
}

select {
  padding: 0 34px 0 11px;
}

.checkbox-control {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--ink);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 800;
}

.checkbox-control:hover {
  border-color: rgba(128, 162, 77, 0.6);
}

.checkbox-control input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

button {
  padding: 0 14px;
  cursor: pointer;
  font-weight: 800;
  transition:
    transform 120ms ease,
    border-color 120ms ease,
    background 120ms ease;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

button:hover,
select:hover,
.tools-menu summary:hover {
  border-color: rgba(128, 162, 77, 0.6);
}

button:active {
  transform: translateY(1px);
}

.primary-button {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.primary-button:hover {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
}

.ghost-button {
  background: transparent;
}

.status-row {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  min-height: 38px;
}

.status-pill,
.stats {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.88);
  padding: 8px 12px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.status-valid {
  border-color: rgba(128, 162, 77, 0.34);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.status-error {
  border-color: rgba(178, 69, 44, 0.3);
  background: var(--removed-soft);
  color: var(--removed);
}

.summary-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.summary-card {
  min-height: 70px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  justify-content: start;
  gap: 10px;
  padding: 12px;
  text-align: left;
  box-shadow: 0 10px 26px rgba(35, 42, 32, 0.08);
}

.summary-card span {
  min-width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  font-size: 1.2rem;
  font-weight: 900;
}

.summary-card strong {
  font-size: 0.88rem;
  text-transform: uppercase;
}

.added-card span {
  background: var(--added-soft);
  color: var(--added);
}

.removed-card span {
  background: var(--removed-soft);
  color: var(--removed);
}

.changed-card span {
  background: var(--changed-soft);
  color: var(--changed);
}

.equal-card span {
  background: var(--equal-soft);
  color: var(--equal);
}

.editor-grid {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
}

.editor-pane,
.diff-panel {
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  background: var(--surface);
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
}

.pane-header label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 900;
}

.pane-header span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

textarea {
  width: 100%;
  height: 100%;
  min-height: 300px;
  resize: none;
  border: 0;
  outline: 0;
  padding: 18px;
  background: transparent;
  color: #142018;
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.96rem;
  line-height: 1.55;
  tab-size: 2;
}

textarea::placeholder {
  color: #8a948b;
}

#rightInput {
  background: rgba(128, 162, 77, 0.045);
}

.diff-table {
  min-height: 0;
  overflow: auto;
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.88rem;
}

.diff-head,
.diff-row {
  display: grid;
  grid-template-columns: minmax(190px, 1.2fr) 110px minmax(0, 1fr) minmax(0, 1fr);
  gap: 0;
  min-width: 880px;
}

.diff-head {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #f8faf4;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.diff-head span,
.diff-row span {
  min-width: 0;
  padding: 10px 12px;
  border-right: 1px solid rgba(217, 223, 208, 0.7);
  overflow-wrap: anywhere;
}

.diff-head span:last-child,
.diff-row span:last-child {
  border-right: 0;
}

.diff-row {
  border-bottom: 1px solid rgba(217, 223, 208, 0.7);
}

.diff-row mark {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 2px 8px;
  border-radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.diff-row-added {
  background: var(--added-soft);
}

.diff-row-added mark {
  background: #d7efd8;
  color: var(--added);
}

.diff-row-removed {
  background: var(--removed-soft);
}

.diff-row-removed mark {
  background: #ffd9ce;
  color: var(--removed);
}

.diff-row-changed {
  background: var(--changed-soft);
}

.diff-row-changed mark {
  background: #f4e4b3;
  color: var(--changed);
}

.diff-row-equal {
  background: var(--equal-soft);
}

.diff-row-equal mark {
  background: #d8e7f4;
  color: var(--equal);
}

.empty-results {
  padding: 18px;
  color: var(--muted);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-weight: 700;
}

.app-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  min-height: 38px;
  padding: 0 4px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.app-footer a {
  color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.app-footer span:has([data-version]) {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.app-footer [data-version] {
  color: var(--accent);
}

@media (max-width: 1040px) {
  .app-shell {
    width: min(100vw - 20px, 800px);
    min-height: calc(100vh - 20px);
    margin: 10px auto;
  }

  .control-panel,
  .editor-grid {
    grid-template-columns: 1fr;
  }

  .summary-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  textarea {
    min-height: 260px;
  }
}

@media (max-width: 620px) {
  .top-bar {
    padding: 14px;
  }

  .brand-lockup {
    gap: 10px;
  }

  .brand-logo {
    width: 58px;
    height: 58px;
  }

  .action-bar,
  .control-row,
  .summary-strip {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    width: 100%;
  }

  .control-group {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .checkbox-control {
    grid-column: span 2;
  }

  .tools-menu,
  .tools-menu summary {
    width: 100%;
  }

  .tools-menu-list {
    width: 100%;
  }

  .status-row,
  .app-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .pane-header {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 8px 14px;
  }

  .pane-header label {
    max-width: 100%;
  }

  .app-footer span:has([data-version]) {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .status-pill,
  .stats {
    width: 100%;
  }

  .diff-head {
    display: none;
  }

  .diff-row {
    grid-template-columns: 1fr;
    min-width: 0;
    padding: 6px 0;
  }

  .diff-row span {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 10px;
    border-right: 0;
    padding: 7px 12px;
  }

  .diff-row span::before {
    content: attr(data-label);
    color: var(--muted);
    font-family:
      Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
      sans-serif;
    font-size: 0.72rem;
    font-weight: 900;
    text-transform: uppercase;
  }
}