: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;
  --violet: #8a7bd8;
  --violet-soft: #e7e3fb;
  --diff-added: #568900;
  --diff-added-soft: #e6f6cb;
  --diff-changed: #b07d00;
  --diff-changed-soft: #fff0c5;
  --diff-removed: #c84c3b;
  --diff-removed-soft: #ffe0da;
  --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;
  --violet-soft: #2e2947;
  --diff-added: #b8f34a;
  --diff-added-soft: #2c3b17;
  --diff-changed: #f4c753;
  --diff-changed-soft: #443818;
  --diff-removed: #ff735f;
  --diff-removed-soft: #4a2520;
  --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,
input:focus-visible,
label[for]:focus-within,
.diagram-canvas: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;
}

/* ------------------------------------------------------------- 헤더 */

.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;
}

.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;
}

/* --------------------------------------------------------------- 히어로 */

.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;
}

/* 한글용 자간(-0.055em)은 라틴 대문자에 너무 좁다. */
.hero h1 .sql-token,
#resultsTitle {
  letter-spacing: -0.012em;
}

.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);
}

/* ------------------------------------------------------------- 입력 영역 */

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

.input-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.45fr);
  align-items: stretch;
  background: var(--line);
  gap: 1px;
}

.ddl-panel,
.option-panel {
  min-width: 0;
  padding: 24px;
  background: var(--surface);
  position: relative;
  overflow: hidden;
}

.ddl-panel {
  min-height: 430px;
  box-shadow: inset 0 0 0 2px var(--acid-dark);
}

.option-panel {
  display: flex;
  flex-direction: column;
  box-shadow: inset 0 0 0 2px var(--cyan);
}

.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: #1f8d7d;
}

[data-theme="dark"] .side-label.target {
  color: var(--cyan);
}

.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;
}

.ddl-panel textarea {
  width: 100%;
  height: 268px;
  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;
}

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

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

.file-footer span:last-child {
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.drop-overlay {
  position: absolute;
  inset: 6px;
  border: 2px dashed var(--acid-dark);
  border-radius: 10px;
  background: color-mix(in srgb, var(--acid) 22%, var(--surface));
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 120ms ease;
}

.ddl-panel.dragging .drop-overlay {
  opacity: 1;
}

.drop-overlay strong {
  font: 800 15px/1 var(--sans);
}

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

/* --------------------------------------------------------------- 옵션 */

.option-list {
  margin: 0;
  padding: 0;
  border: 0;
  display: grid;
  gap: 12px;
}

.option-list[hidden] {
  display: none;
}

/* 규칙 묶음이 이어 붙으면 범례가 앞 항목에 달라붙는다. */
.option-list + .option-list {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.option-list legend {
  padding: 0;
  margin-bottom: 6px;
  color: var(--muted);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.12em;
}

.check-control {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.check-control input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--acid-dark);
  cursor: pointer;
}

.option-note {
  margin: -4px 0 4px 26px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
  word-break: keep-all;
}

/* 체크박스가 아니라 전체 폭 컨트롤을 설명할 때는 들여쓰지 않는다. */
.option-note.flush {
  margin-left: 0;
}

.option-note code {
  padding: 1px 4px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper);
  font: 10px/1 var(--mono);
}

.warning-box {
  margin-top: 18px;
  padding: 12px 14px;
  border: 1px solid var(--amber);
  border-radius: 8px;
  background: var(--amber-soft);
}

.warning-box[hidden] {
  display: none;
}

.warning-box strong {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  font-weight: 800;
}

.warning-box ul {
  margin: 0;
  padding-left: 16px;
  display: grid;
  gap: 4px;
}

.warning-box li {
  font-size: 11px;
  line-height: 1.55;
  word-break: break-word;
}

.primary-actions {
  margin-top: auto;
  padding-top: 22px;
  display: grid;
  gap: 10px;
  justify-items: stretch;
}

.primary-actions > span {
  color: var(--muted);
  font-size: 11px;
  text-align: right;
}

kbd {
  padding: 2px 5px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--paper);
  font: 700 10px/1 var(--mono);
}

.compare-button {
  padding: 15px 20px;
  border: 1px solid var(--ink);
  border-radius: 9px;
  background: var(--ink);
  color: var(--paper);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
}

.compare-button:hover {
  background: var(--acid);
  color: #19210d;
  border-color: var(--acid-dark);
}

.compare-button svg {
  width: 17px;
  height: 17px;
}

/* --------------------------------------------------------------- 결과 */

.results-section {
  padding: 54px 0 20px;
}

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

.results-topline h2 {
  margin: 0;
  font-size: clamp(26px, 3vw, 38px);
  letter-spacing: -0.045em;
}

.result-state {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font-size: 13px;
  font-weight: 750;
}

.result-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--acid-dark);
}

.result-state.empty .result-dot {
  background: var(--coral);
}

.stats-grid {
  margin: 28px 0 22px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  background: var(--line);
  border: 1px solid var(--line);
  gap: 1px;
}

.stat-cell {
  padding: 18px;
  background: var(--surface);
  display: grid;
  gap: 5px;
  align-content: start;
}

.stat-cell > span {
  color: var(--muted);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.1em;
}

.stat-cell strong {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

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

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

.stat-cell.changed strong {
  color: #b07d00;
}

.stat-cell.removed strong {
  color: #c84c3b;
}

[data-theme="dark"] .stat-cell.changed strong {
  color: var(--amber);
}

[data-theme="dark"] .stat-cell.removed strong {
  color: var(--coral);
}

/* ------------------------------------------------------------- 툴바 */

.result-toolbar {
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.toolbar-spacer {
  flex: 1 1 auto;
}

.segmented {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  overflow: hidden;
}

.segmented button {
  padding: 9px 14px;
  border: 0;
  background: var(--surface);
  font-size: 12px;
  font-weight: 750;
  cursor: pointer;
}

.segmented button + button {
  border-left: 1px solid var(--line-strong);
}

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

.search-field {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
}

.search-field svg {
  width: 15px;
  height: 15px;
  color: var(--muted);
  flex: 0 0 auto;
}

.search-field input {
  width: 190px;
  padding: 9px 0;
  border: 0;
  background: none;
  color: var(--ink);
  font-size: 12px;
  font-weight: 650;
  outline: none;
}

.search-field input::-webkit-search-cancel-button {
  cursor: pointer;
}

.diff-position {
  min-width: 58px;
  color: var(--muted);
  font: 700 11px/1 var(--mono);
  text-align: center;
}

.zoom-group {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  overflow: hidden;
}

.zoom-group output {
  min-width: 54px;
  padding: 0 4px;
  border-left: 1px solid var(--line-strong);
  border-right: 1px solid var(--line-strong);
  font: 700 11px/1 var(--mono);
  text-align: center;
}

.zoom-group .tool-button {
  border: 0;
  border-radius: 0;
}

.tool-button {
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 750;
  cursor: pointer;
}

.tool-button:hover:not(:disabled) {
  border-color: var(--ink);
  background: var(--surface-2);
}

.tool-button:disabled {
  opacity: 0.45;
  cursor: default;
}

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

/* ----------------------------------------------------------- 다이어그램 */

.diagram-frame {
  margin-top: 18px;
  border: 1px solid var(--line);
  background: var(--line);
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 1px;
  overflow: hidden;
}

.table-rail {
  background: var(--surface);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.rail-head {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.12em;
}

.rail-head strong {
  color: var(--ink);
  font-size: 12px;
}

.table-rail ul {
  margin: 0;
  padding: 6px;
  list-style: none;
  display: grid;
  gap: 2px;
  align-content: start;
  overflow: auto;
  max-height: 660px;
}

.rail-item {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 7px;
  background: none;
  display: grid;
  gap: 3px;
  text-align: left;
  cursor: pointer;
}

.rail-item:hover {
  background: var(--surface-2);
}

.rail-item.selected {
  border-color: var(--ink);
  background: var(--acid);
  color: #19210d;
}

.rail-item.dimmed {
  opacity: 0.3;
}

.rail-item strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: 700 12px/1.3 var(--mono);
}

.rail-item span {
  color: var(--muted);
  font-size: 10px;
}

.rail-item.selected span {
  color: #3c4a1b;
}

.rail-empty {
  padding: 14px 10px;
  color: var(--muted);
  font-size: 11px;
  text-align: center;
}

.diagram-canvas {
  position: relative;
  min-height: 660px;
  background-color: var(--paper);
  background-image:
    radial-gradient(circle, color-mix(in srgb, var(--line-strong) 55%, transparent) 1px, transparent 1px);
  background-size: 26px 26px;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

.diagram-canvas.panning {
  cursor: grabbing;
}

.diagram-canvas.dragging-node {
  cursor: grabbing;
}

#diagramSvg {
  width: 100%;
  height: 100%;
  display: block;
  stroke: none;
  position: absolute;
  inset: 0;
}

.diagram-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 8px;
  text-align: center;
  pointer-events: none;
}

.diagram-empty[hidden] {
  display: none;
}

.diagram-empty strong {
  font-size: 15px;
  font-weight: 800;
}

.diagram-empty span {
  color: var(--muted);
  font-size: 12px;
}

.diagram-legend {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  backdrop-filter: blur(6px);
  pointer-events: none;
}

.diagram-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
}

.legend-line {
  width: 22px;
  height: 0;
  border-top: 2px solid var(--line-strong);
}

.legend-line.explicit {
  border-color: #1f8d7d;
}

.legend-line.inferred {
  border-top-style: dashed;
  border-color: var(--violet);
}

[data-theme="dark"] .legend-line.explicit {
  border-color: var(--cyan);
}

.legend-badge {
  padding: 2px 4px;
  border-radius: 3px;
  font: 800 8px/1 var(--mono);
  font-style: normal;
  letter-spacing: 0.04em;
}

.legend-badge.pk {
  background: var(--amber);
  color: #4a3800;
}

.legend-badge.fk {
  background: var(--cyan);
  color: #0d3d36;
}

.legend-badge.uq {
  background: var(--violet);
  color: #fff;
}

/* --------------------------------------------------- 다이어그램 SVG 요소 */

.node-body {
  fill: var(--surface);
  stroke: var(--line-strong);
  stroke-width: 1.5;
}

.node-head {
  fill: var(--surface-2);
  stroke: none;
}

.node-divider {
  stroke: var(--line);
  stroke-width: 1;
}

.node-title {
  fill: var(--ink);
  font: 800 13px var(--mono);
}

.node-schema {
  fill: var(--muted);
  font: 700 9px var(--mono);
}

.node-count {
  fill: var(--muted);
  font: 700 10px var(--mono);
  text-anchor: end;
}

.row-name {
  fill: var(--ink);
  font: 400 11.5px var(--mono);
}

.row-name.is-key {
  font-weight: 700;
}

.row-type {
  fill: var(--muted);
  font: 400 10.5px var(--mono);
  text-anchor: end;
}

.row-more {
  fill: var(--muted);
  font: 700 10px var(--mono);
}

.row-hit {
  fill: transparent;
}

.badge-box {
  stroke: none;
}

.badge-box.pk {
  fill: var(--amber);
}

.badge-box.fk {
  fill: var(--cyan);
}

.badge-box.uq {
  fill: var(--violet);
}

.badge-text {
  font: 800 7.5px var(--mono);
  text-anchor: middle;
}

.badge-text.pk {
  fill: #4a3800;
}

.badge-text.fk {
  fill: #0d3d36;
}

.badge-text.uq {
  fill: #ffffff;
}

.node {
  cursor: grab;
}

.node.dragging {
  cursor: grabbing;
}

.node.selected .node-body {
  stroke: var(--ink);
  stroke-width: 2.5;
}

.node.selected .node-head {
  fill: var(--acid);
}

.node.selected .node-title,
.node.selected .node-schema,
.node.selected .node-count {
  fill: #19210d;
}

.node.related .node-body {
  stroke: #1f8d7d;
  stroke-width: 2;
}

[data-theme="dark"] .node.related .node-body {
  stroke: var(--cyan);
}

.node.match .node-body {
  stroke: var(--coral);
  stroke-width: 2.5;
}

.node.dimmed {
  opacity: 0.24;
}

.edge-path {
  fill: none;
  stroke: #1f8d7d;
  stroke-width: 1.6;
}

[data-theme="dark"] .edge-path {
  stroke: var(--cyan);
}

.edge-marker {
  fill: none;
  stroke: #1f8d7d;
  stroke-width: 1.6;
  stroke-linecap: round;
}

[data-theme="dark"] .edge-marker {
  stroke: var(--cyan);
}

.edge-marker.optional {
  fill: var(--paper);
}

.edge.inferred .edge-path {
  stroke: var(--violet);
  stroke-dasharray: 6 4;
}

.edge.inferred .edge-marker {
  stroke: var(--violet);
}

.edge.active .edge-path,
.edge.active .edge-marker {
  stroke: var(--coral);
  stroke-width: 2.4;
}

.edge.dimmed {
  opacity: 0.14;
}

/* ------------------------------------------------------------- 상세 */

.detail-panel {
  margin-top: 18px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.detail-empty {
  padding: 28px;
  display: grid;
  gap: 6px;
  justify-items: center;
  text-align: center;
}

.detail-empty[hidden] {
  display: none;
}

.detail-empty strong {
  font-size: 14px;
  font-weight: 800;
}

.detail-empty span {
  color: var(--muted);
  font-size: 12px;
}

.detail-body[hidden] {
  display: none;
}

.detail-head {
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.detail-schema {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.1em;
}

.detail-head strong {
  font: 800 18px/1.2 var(--mono);
  letter-spacing: -0.01em;
}

.detail-head p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
  word-break: keep-all;
}

.detail-head p:empty {
  display: none;
}

.detail-columns {
  overflow-x: auto;
}

.detail-columns table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.detail-columns th {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.08em;
  text-align: left;
  white-space: nowrap;
}

.detail-columns td {
  padding: 9px 14px;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 55%, transparent);
  vertical-align: top;
}

.detail-columns tbody tr:last-child td {
  border-bottom: 0;
}

.detail-columns td:nth-child(2) {
  font: 700 12px var(--mono);
  white-space: nowrap;
}

.detail-columns td:nth-child(3),
.detail-columns td:nth-child(5) {
  color: var(--muted);
  font: 400 11px var(--mono);
  white-space: nowrap;
}

.detail-columns td:nth-child(4) {
  color: var(--muted);
  font-size: 11px;
  white-space: nowrap;
}

.detail-columns td:last-child {
  color: var(--muted);
  min-width: 160px;
}

.key-chip {
  display: inline-block;
  margin-right: 3px;
  padding: 2px 5px;
  border-radius: 3px;
  font: 800 8px/1.4 var(--mono);
  letter-spacing: 0.04em;
}

.key-chip.pk {
  background: var(--amber);
  color: #4a3800;
}

.key-chip.fk {
  background: var(--cyan);
  color: #0d3d36;
}

.key-chip.uq {
  background: var(--violet);
  color: #fff;
}

.detail-relations {
  padding: 16px 22px 20px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 8px;
}

.detail-relations:empty {
  display: none;
}

.relation-line {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
  font-size: 12px;
}

.relation-line b {
  padding: 3px 7px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  font: 700 11px var(--mono);
}

.relation-line em {
  color: var(--muted);
  font-style: normal;
  font-size: 11px;
}

.relation-tag {
  padding: 2px 6px;
  border-radius: 4px;
  font: 800 9px/1.5 var(--mono);
  letter-spacing: 0.04em;
}

.relation-tag.explicit {
  background: var(--cyan-soft);
  color: #0d5c50;
}

.relation-tag.inferred {
  background: var(--violet-soft);
  color: #4a3f8f;
}

[data-theme="dark"] .relation-tag.explicit {
  color: var(--cyan);
}

[data-theme="dark"] .relation-tag.inferred {
  color: #b9adf5;
}

.relation-link {
  padding: 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: none;
  color: inherit;
  font: 700 11px var(--mono);
  cursor: pointer;
}

/* --------------------------------------------------------------- 하단 */

.result-footer {
  margin-top: 22px;
  padding: 20px 0 8px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

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

.result-footer > div {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.secondary-button {
  padding: 11px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 750;
  cursor: pointer;
}

.secondary-button:hover {
  border-color: var(--ink);
  background: var(--surface-2);
}

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

.secondary-button.dark:hover {
  background: var(--acid);
  color: #19210d;
}

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

.how-it-works {
  padding: 60px 0 70px;
  border-top: 1px solid var(--line);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(228px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.feature-grid article {
  padding: 26px;
  background: var(--surface);
  display: grid;
  gap: 10px;
  align-content: start;
}

.feature-grid span {
  color: var(--acid-dark);
  font: 800 11px/1 var(--mono);
  letter-spacing: 0.1em;
}

.feature-grid h3 {
  margin: 0;
  font-size: 17px;
  letter-spacing: -0.02em;
  word-break: keep-all;
}

.feature-grid p {
  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);
}

/* ------------------------------------------------------------- 반응형 */

/* --------------------------------------------------------------- 비교 모드 */

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface);
}

.lang-switch button {
  padding: 7px 12px;
  border: 0;
  background: none;
  color: var(--muted);
  font: 800 11px/1 var(--mono);
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
}

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

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

.mode-switch {
  padding: 20px 0 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.mode-kicker {
  color: var(--muted);
  font: 800 11px/1 var(--mono);
  letter-spacing: 0.16em;
}

.mode-tabs {
  display: inline-flex;
  border: 2px solid var(--ink);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface);
}

.mode-tabs button {
  padding: 12px 20px;
  border: 0;
  background: none;
  color: inherit;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
}

.mode-tabs button + button {
  border-left: 2px solid var(--ink);
}

.mode-tabs button svg {
  width: 17px;
  height: 17px;
}

.mode-tabs button:hover {
  background: var(--surface-2);
}

.mode-tabs button.active,
.mode-tabs button.active:hover {
  background: var(--acid);
  color: #19210d;
}

.mode-note {
  color: var(--muted);
  font-size: 12px;
  word-break: keep-all;
}

.swap-button {
  margin-left: auto;
  padding: 10px 16px;
  border: 2px solid var(--ink);
  border-radius: 10px;
  background: var(--surface);
  color: inherit;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
}

.swap-button[hidden] {
  display: none;
}

.swap-button:hover {
  background: var(--acid);
  color: #19210d;
}

.swap-button svg {
  width: 16px;
  height: 16px;
}

.input-grid.compare {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(250px, 0.5fr);
}

.target-panel {
  box-shadow: inset 0 0 0 2px var(--cyan);
}

.target-panel .drop-overlay {
  border-color: var(--cyan);
  background: color-mix(in srgb, var(--cyan) 22%, var(--surface));
}

.select-control {
  display: grid;
  gap: 6px;
}

.select-control > span {
  color: var(--muted);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.1em;
}

.select-control select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: var(--paper);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

/* ------------------------------------------------------- 다이어그램 범례 */

.diagram-legend[hidden] {
  display: none;
}

.diff-legend {
  left: auto;
  right: 14px;
}

.legend-swatch {
  width: 13px;
  height: 13px;
  border-radius: 3px;
  border: 1.5px solid var(--line-strong);
  background: var(--surface-2);
}

.legend-swatch.added {
  border-color: var(--diff-added);
  background: var(--diff-added-soft);
}

.legend-swatch.changed {
  border-color: var(--diff-changed);
  background: var(--diff-changed-soft);
}

.legend-swatch.removed {
  border-color: var(--diff-removed);
  background: var(--diff-removed-soft);
}

/* --------------------------------------------------- 다이어그램 변경 표시 */

.node.diff-added .node-body {
  stroke: var(--diff-added);
  stroke-width: 2.2;
}

.node.diff-added .node-head {
  fill: var(--diff-added-soft);
}

.node.diff-changed .node-body {
  stroke: var(--diff-changed);
  stroke-width: 2.2;
}

.node.diff-changed .node-head {
  fill: var(--diff-changed-soft);
}

.node.diff-removed .node-body {
  stroke: var(--diff-removed);
  stroke-width: 2.2;
  stroke-dasharray: 7 4;
}

.node.diff-removed .node-head {
  fill: var(--diff-removed-soft);
}

.node.diff-removed .node-title,
.node.diff-removed .row-name {
  text-decoration: line-through;
}

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

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

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

.row.diff-removed .row-name {
  text-decoration: line-through;
}

.row-mark {
  font: 800 11px/1 var(--mono);
}

.row-mark.added {
  fill: var(--diff-added);
}

.row-mark.changed {
  fill: var(--diff-changed);
}

.row-mark.removed {
  fill: var(--diff-removed);
}

/* --------------------------------------------------------------- 비교 결과 */

.compare-report {
  margin-top: 26px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.report-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.report-head h3 {
  margin: 0;
  font-size: 21px;
  letter-spacing: -0.03em;
}

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

.report-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  background: var(--line);
  border: 1px solid var(--line);
  gap: 1px;
}

.change-list,
.script-box {
  min-width: 0;
  background: var(--surface);
  padding: 18px;
}

.change-list {
  max-height: 560px;
  overflow: auto;
  display: grid;
  gap: 10px;
  align-content: start;
  /* 칸 높이가 정해져 있으면 auto 행이 남는 공간을 나눠 가져서 카드 내용이 잘린다. */
  grid-auto-rows: min-content;
}

.change-empty {
  padding: 26px 10px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.change-table {
  border: 1px solid var(--line);
  border-radius: 9px;
  overflow: hidden;
  background: var(--paper);
}

.change-head {
  width: 100%;
  padding: 11px 13px;
  border: 0;
  border-left: 4px solid var(--line-strong);
  background: none;
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  cursor: pointer;
  color: inherit;
}

.change-head:hover {
  background: var(--surface-2);
}

.change-table.added .change-head {
  border-left-color: var(--diff-added);
}

.change-table.changed .change-head {
  border-left-color: var(--diff-changed);
}

.change-table.removed .change-head {
  border-left-color: var(--diff-removed);
}

.change-flag {
  flex: 0 0 auto;
  padding: 3px 7px;
  border-radius: 4px;
  font: 800 9px/1.4 var(--mono);
  letter-spacing: 0.06em;
  background: var(--surface-2);
  color: var(--muted);
}

.change-table.added .change-flag {
  background: var(--diff-added-soft);
  color: var(--diff-added);
}

.change-table.changed .change-flag {
  background: var(--diff-changed-soft);
  color: var(--diff-changed);
}

.change-table.removed .change-flag {
  background: var(--diff-removed-soft);
  color: var(--diff-removed);
}

.change-head strong {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: 700 13px/1.3 var(--mono);
}

.change-head em {
  margin-left: auto;
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
}

.change-lines {
  margin: 0;
  padding: 0 13px 11px;
  list-style: none;
  display: grid;
  gap: 4px;
}

.change-lines li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font: 11.5px/1.6 var(--mono);
  word-break: break-all;
}

.change-lines i {
  flex: 0 0 12px;
  font-style: normal;
  font-weight: 800;
  color: var(--muted);
}

.change-lines li.added i {
  color: var(--diff-added);
}

.change-lines li.changed i {
  color: var(--diff-changed);
}

.change-lines li.removed i {
  color: var(--diff-removed);
}

.change-lines b {
  font-weight: 700;
}

.change-lines span {
  color: var(--muted);
}

.change-lines s {
  color: var(--diff-removed);
  text-decoration-thickness: 1px;
}

/* 머리말과 경고는 그대로 두고 스크립트만 늘었다 줄었다 하며 스스로 스크롤한다. */
.script-box {
  max-height: 560px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.script-head,
.script-notes {
  flex: 0 0 auto;
}

.script-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.script-head output {
  color: var(--muted);
  font: 700 11px/1 var(--mono);
}

.script-box pre {
  margin: 0;
  padding: 15px 16px;
  flex: 1 1 auto;
  min-height: 120px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  font: 11.5px/1.7 var(--mono);
  tab-size: 2;
  white-space: pre;
}

.script-notes {
  padding: 12px 14px;
  border: 1px solid var(--diff-changed);
  border-radius: 8px;
  background: var(--diff-changed-soft);
}

.script-notes strong {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
}

.script-notes ul {
  margin: 0;
  padding-left: 17px;
  display: grid;
  gap: 4px;
}

.script-notes li {
  font-size: 11.5px;
  line-height: 1.6;
  word-break: keep-all;
}

.rail-flag {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--line-strong);
  vertical-align: middle;
}

.rail-flag.added {
  background: var(--diff-added);
}

.rail-flag.changed {
  background: var(--diff-changed);
}

.rail-flag.removed {
  background: var(--diff-removed);
}

@media (max-width: 1160px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

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

  .stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .diagram-frame {
    grid-template-columns: 1fr;
  }

  .table-rail ul {
    max-height: 190px;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }

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

@media (max-width: 720px) {
  .privacy-note {
    display: none;
  }

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

  .result-toolbar {
    gap: 8px;
  }

  .search-field input {
    width: 120px;
  }

  .toolbar-spacer {
    display: none;
  }

  .diagram-canvas {
    min-height: 460px;
  }

  .diagram-legend {
    left: 8px;
    right: 8px;
    bottom: 8px;
    gap: 10px;
  }

  /* 좁은 화면에서는 두 범례가 겹치므로 변경 범례만 남긴다. */
  .diagram-canvas.compare .diagram-legend:not(.diff-legend) {
    display: none;
  }

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

  .site-footer {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .site-footer > span {
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition-duration: 1ms !important;
  }
}