:root {
  --bg: #eef2f7;
  --surface: #ffffff;
  --text: #0f1f34;
  --muted: #52637d;
  --border: #d7e1ed;
  --primary: #0d6efd;
  --primary-dark: #0a4fb4;
  --danger-bg: #ffe6e6;
  --danger-text: #b12c2c;
  --success: #0d8a51;
  --app-shell-max: 1220px;
  --rail-divider-color: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Noto Sans KR", "Noto Sans", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #dbe8ff 0%, var(--bg) 55%);
}

.hero {
  text-align: center;
  padding-block: 1.8rem 0.9rem;
}

.hero h1 {
  margin: 0;
  font-size: 2rem;
}

.hero p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.toolbar {
  margin: 0.2rem auto 1rem;
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 940px) {
  .toolbar {
    grid-template-columns: 320px 1fr;
    align-items: end;
  }
}

.layout {
  margin: 0 auto 1rem;
  display: grid;
  gap: 1rem;
}

@media (min-width: 1100px) {
  .layout {
    grid-template-columns: 300px minmax(0, 1fr) 280px;
    align-items: start;
  }
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  min-width: 0;
}

.left-panel,
.main-panel,
.right-panel {
  min-height: 540px;
}

.right-panel {
  position: sticky;
  top: 1rem;
}

.left-panel,
.right-panel {
  display: grid;
  align-content: start;
  gap: 0.85rem;
  min-width: 0;
}

h2,
h3 {
  margin: 0;
}

label {
  display: grid;
  gap: 0.45rem;
  font-weight: 600;
  font-size: 0.95rem;
}

input,
select,
button {
  font: inherit;
}

select,
input[type="text"],
input[type="number"] {
  width: 100%;
  border: 1px solid #c4d3e5;
  border-radius: 8px;
  padding: 0.6rem 0.68rem;
  background: #fff;
}

select:focus,
input:focus {
  border-color: var(--primary);
  outline: 2px solid #d1e2ff;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.button-row.compact {
  gap: 0.35rem;
}

button {
  border: none;
  border-radius: 8px;
  padding: 0.58rem 0.9rem;
  color: #fff;
  background: var(--primary);
  cursor: pointer;
  font-weight: 600;
}

button:hover:not(:disabled) {
  background: var(--primary-dark);
}

button.secondary {
  background: #1f344e;
}

button.secondary:hover:not(:disabled) {
  background: #16263a;
}

button.ghost {
  border: 1px solid #b7c7dd;
  background: #fff;
  color: #22354f;
}

button.ghost:hover:not(:disabled) {
  background: #f5f8fc;
}

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

.drop-zone {
  border: 1px dashed #8ea8cc;
  border-radius: 10px;
  padding: 1rem 0.85rem;
  background: #f5f9ff;
  color: #426188;
  line-height: 1.45;
}

.drop-zone.is-over {
  border-color: var(--primary);
  background: #eaf2ff;
}

.stack {
  display: grid;
  gap: 0.5rem;
}

.stack.compact {
  gap: 0.3rem;
}

.field-row {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.92rem;
}

.field-row span {
  color: var(--muted);
}

.field-row strong {
  text-align: right;
}

.side-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
  display: grid;
  gap: 0.35rem;
  font-size: 0.92rem;
  min-width: 0;
}

.side-list li {
  overflow-wrap: anywhere;
}

.side-list.compact {
  gap: 0.25rem;
}

.recipe-details {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.45rem 0.6rem;
  background: #fbfdff;
  min-width: 0;
}

.recipe-details summary {
  cursor: pointer;
  color: #284566;
  font-weight: 600;
}

.recipe-details .side-list {
  margin-top: 0.45rem;
}

.guide-hint {
  margin-top: 0.35rem;
  font-size: 0.84rem;
}

.snippet {
  margin: 0.35rem 0 0.6rem;
  padding: 0.55rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #f8fbff;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.8rem;
  line-height: 1.35;
  color: #1f3554;
}

.recipe-editor {
  display: grid;
  gap: 0.45rem;
}

.recipe-editor textarea {
  width: 100%;
  min-height: 320px;
  border: 1px solid #c4d3e5;
  border-radius: 10px;
  padding: 0.65rem;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.84rem;
  line-height: 1.4;
  resize: vertical;
}

.recipe-lint {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f9fbfe;
  padding: 0.55rem 0.65rem;
}

.recipe-lint .side-list {
  margin-top: 0.4rem;
}

.builder-grid {
  display: grid;
  gap: 0.55rem;
}

@media (min-width: 980px) {
  .builder-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.builder-checkbox {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.55rem 0.6rem;
  background: #f9fbff;
}

.builder-checkbox input {
  width: auto;
  margin: 0;
}

.builder-wrap {
  max-height: none;
  overflow: visible;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

.builder-table {
  min-width: 0;
  width: 100%;
  table-layout: fixed;
}

.builder-table th,
.builder-table td {
  font-size: 0.82rem;
  overflow-wrap: anywhere;
}

.builder-row-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.35rem;
  height: 1.25rem;
  border-radius: 999px;
  border: 1px solid #c6d6eb;
  background: #f7fbff;
  color: #2a4666;
  font-size: 0.68rem;
  font-weight: 700;
}

.builder-column-row.is-new {
  animation: builderRowPulse 0.9s ease-out;
}

@keyframes builderRowPulse {
  0% {
    background-color: #fff9dc;
  }
  100% {
    background-color: transparent;
  }
}

.builder-table input,
.builder-table select {
  min-width: 0;
  width: 100%;
  padding: 0.45rem 0.48rem;
  font-size: 0.82rem;
}

.builder-rule-editor {
  display: grid;
  gap: 0.4rem;
  min-width: 0;
}

.builder-rule-list {
  display: grid;
  gap: 0.35rem;
}

.builder-rule-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "handle rule remove"
    "handle arg remove";
  gap: 0.32rem 0.4rem;
  align-items: center;
  padding: 0.34rem;
  border: 1px solid #d7e3f3;
  border-radius: 8px;
  background: #fbfdff;
}

.builder-rule-item select,
.builder-rule-item input {
  min-width: 0;
}

.builder-rule-select {
  grid-area: rule;
}

.builder-rule-arg {
  grid-area: arg;
}

.builder-rule-handle {
  grid-area: handle;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.7rem;
  border: 1px solid #cbd7e8;
  border-radius: 7px;
  background: #f7fbff;
  color: #2c4562;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: grab;
  user-select: none;
}

.builder-rule-item.is-dragging {
  opacity: 0.55;
}

.builder-rule-list.is-dragging-active {
  outline: 1px dashed #8ab0df;
  outline-offset: 2px;
  border-radius: 8px;
}

.builder-mini-add,
.builder-mini-remove {
  border: 1px solid #b7c7dd;
  background: #fff;
  color: #22354f;
  padding: 0.3rem 0.5rem;
  border-radius: 7px;
  font-size: 0.75rem;
  font-weight: 600;
}

.builder-mini-remove {
  border-color: #e0b7b7;
  color: #933;
  grid-area: remove;
}

.builder-mini-add:hover:not(:disabled),
.builder-mini-remove:hover:not(:disabled) {
  background: #f4f8ff;
}

.builder-row-remove {
  border: 1px solid #d7a3a3;
  background: #fff7f7;
  color: #9c3232;
  padding: 0.4rem 0.6rem;
  white-space: nowrap;
}

.builder-row-remove:hover:not(:disabled) {
  background: #ffecec;
}

.builder-col-num {
  width: 2.6rem;
}

.builder-col-meta {
  width: 19rem;
}

.builder-col-required {
  width: 5.4rem;
}

.builder-col-validator,
.builder-col-transform {
  width: auto;
}

.builder-col-remove {
  width: 6.4rem;
}

.builder-identity-cell {
  display: grid;
  gap: 0.36rem;
}

.builder-identity-field {
  display: grid;
  gap: 0.24rem;
  font-weight: 600;
  font-size: 0.74rem;
  color: #365274;
}

.builder-identity-label {
  line-height: 1.2;
}

.builder-required-input {
  width: 1.1rem;
  height: 1.1rem;
  margin: 0 auto;
  display: block;
}

body.studio-open {
  overflow: hidden;
}

.studio-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.studio-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 31, 52, 0.5);
}

.studio-dialog {
  position: relative;
  width: min(1360px, calc(100vw - 1rem));
  max-height: calc(100vh - 2rem);
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #fff;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
}

.studio-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
}

.studio-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  padding: 0.7rem 1rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

.studio-tab {
  border: 1px solid #b7c7dd;
  background: #f7faff;
  color: #1f3554;
}

.studio-tab.is-active {
  border-color: var(--primary);
  background: #e7f0ff;
}

.studio-tab-panel {
  min-width: 0;
  overflow: auto;
  padding: 0.9rem 1rem;
  display: grid;
  align-content: start;
  gap: 0.7rem;
}

.studio-tab-panel.builder-panel {
  overflow-y: auto;
  overflow-x: hidden;
}

.studio-footer {
  border-top: 1px solid var(--border);
  padding: 0.75rem 1rem 0.9rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

.example-grid {
  display: grid;
  gap: 0.75rem;
}

.example-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem;
  background: #fbfdff;
  min-width: 0;
}

.example-card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.tab {
  border: 1px solid #b7c7dd;
  background: #f7faff;
  color: #1f3554;
}

.tab.is-active {
  border-color: var(--primary);
  background: #e7f0ff;
}

.tab-panel {
  display: grid;
  gap: 0.65rem;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  align-items: center;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.filter-row label {
  font-size: 0.85rem;
}

.issues-pager {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.55rem;
}

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

.results-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.results-wrap.compact {
  max-height: 250px;
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border-top: 1px solid var(--border);
  padding: 0.55rem 0.52rem;
  text-align: left;
  vertical-align: top;
  font-size: 0.88rem;
}

thead th {
  border-top: none;
  background: #f3f7fd;
  color: #304761;
}

.report-frame {
  width: 100%;
  min-height: 420px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

.kpis {
  display: grid;
  gap: 0.5rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.kpi {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.64rem;
  background: #f9fbfe;
}

.kpi .label {
  display: block;
  color: var(--muted);
  font-size: 0.81rem;
}

.kpi strong {
  display: block;
  margin-top: 0.2rem;
  font-size: 1rem;
}

.message {
  margin: 0;
  border-radius: 10px;
  padding: 0.72rem 0.8rem;
  font-size: 0.9rem;
}

.message.error {
  border: 1px solid #ffc4c4;
  color: var(--danger-text);
  background: var(--danger-bg);
}

.message.warning {
  border: 1px solid #f6d690;
  color: #8a5c00;
  background: #fff5da;
}

.muted {
  margin: 0;
  color: var(--muted);
}

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

.muted.warning {
  color: #8a5c00;
}

.badge {
  border-radius: 999px;
  padding: 0.1rem 0.44rem;
  font-size: 0.78rem;
  color: #fff;
}

.badge.error {
  background: #ca3e3e;
}

.badge.warning {
  background: #c48909;
}

.badge.info {
  background: #4466a8;
}

.guide-layout {
  margin: 0 auto 1.1rem;
  display: grid;
  gap: 0.8rem;
  grid-template-columns: 1fr;
}

@media (min-width: 920px) {
  .guide-layout {
    grid-template-columns: 1fr 1fr;
  }
}

.guide-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #ffffff;
  padding: 0.85rem;
}

.guide-card h2 {
  margin: 0;
  font-size: 1rem;
}

.guide-card p,
.guide-card li {
  color: var(--muted);
  line-height: 1.56;
}

.guide-card p {
  margin: 0.55rem 0 0;
}

.guide-card ul,
.guide-card ol {
  margin: 0.55rem 0 0;
  padding-left: 1.15rem;
}

.faq-card details {
  margin-top: 0.5rem;
  border: 1px solid #dce7f7;
  border-radius: 10px;
  padding: 0.5rem 0.62rem;
  background: #f9fcff;
}

.faq-card summary {
  cursor: pointer;
  font-weight: 600;
  color: #22456e;
}

.faq-card details p {
  margin-top: 0.42rem;
}

.updated-at {
  margin-top: 0.62rem;
  font-size: 0.85rem;
}

.statusbar {
  margin: 0 auto;
  padding: 0.72rem 1rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: #f7faff;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: #3d5578;
  font-size: 0.88rem;
}

footer {
  text-align: center;
  padding-bottom: 2rem;
  color: var(--muted);
}

.hidden {
  display: none !important;
}

.tool-footer {
  margin-top: 56px;
}

.tool-footer__inner {
  text-align: left;
}

.tool-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 14px;
}

.tool-footer__nav a {
  color: inherit;
  text-decoration: none;
}

.tool-footer__nav a:hover,
.tool-footer__nav a:focus-visible {
  text-decoration: underline;
}

.tool-footer__meta,
.tool-footer__note {
  margin: 0 0 10px;
  line-height: 1.65;
  font-size: 0.95rem;
  color: #4b5563;
}

.mode-toolbar {
  margin: 0.2rem auto 0.8rem;
  display: grid;
  gap: 0.6rem;
}

.mode-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.mode-tab {
  border: 1px solid #b7c7dd;
  background: #f7faff;
  color: #1f3554;
}

.mode-tab.is-active {
  border-color: var(--primary);
  background: #e7f0ff;
}

.mode-tab:hover:not(:disabled) {
  background: #edf4ff;
  color: #1f3554;
}

.toolbar {
  display: block;
}

.step-strip {
  display: grid;
  gap: 0.65rem;
}

@media (min-width: 960px) {
  .step-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.step-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f8fbff;
  padding: 0.75rem;
  display: grid;
  gap: 0.45rem;
}

.step-card.is-active {
  border-color: #8fb3e3;
  box-shadow: inset 0 0 0 1px #d5e6ff;
  background: #eef5ff;
}

.step-card h2 {
  font-size: 1rem;
  margin: 0;
}

.step-num {
  margin: 0;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #dceaff;
  color: #1f3e65;
  font-weight: 700;
  font-size: 0.82rem;
}

.starter-grid {
  display: grid;
  gap: 0.55rem;
}

.starter-card {
  border: 1px solid #cbdaee;
  border-radius: 10px;
  background: #fbfdff;
  color: #1f3554;
  padding: 0.6rem 0.68rem;
  display: grid;
  gap: 0.35rem;
  font-size: 0.83rem;
}

.starter-card strong {
  font-size: 0.9rem;
}

.starter-card-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 0.5rem;
}

.starter-card-meta {
  display: grid;
  gap: 0.2rem;
}

.starter-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.starter-card-actions button {
  min-width: 0;
}

.starter-card span {
  color: #4f6787;
}

.starter-card.is-active {
  border-color: #8ab0df;
  background: #eef5ff;
}

.starter-card:hover:not(:disabled) {
  background: #f1f7ff;
  color: #1f3554;
}

.small {
  font-size: 0.82rem;
}

.inline-check {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.84rem;
  padding-top: 1.3rem;
}

.export-option {
  padding-top: 0;
}

.inline-check input {
  width: auto;
}

#recentRunList li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.45rem;
}

#recentRunList li button {
  flex: 0 0 auto;
}

tbody tr.issue-active {
  background: #f0f7ff;
}

td.preview-cell-target {
  background: #fff4d6;
  box-shadow: inset 0 0 0 1px #f0bb3f;
}

td.preview-cell-editable {
  cursor: text;
}

td.preview-cell-edited {
  background: #eaf8ef;
}

.split-pair {
  display: grid;
  gap: 0.1rem;
  min-width: 120px;
}

.split-pair .split-raw {
  color: #566a85;
  font-size: 0.78rem;
}

.split-pair .split-normalized {
  color: #14273f;
  font-weight: 600;
  font-size: 0.8rem;
}

.issue-inspector {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem;
  background: #fbfdff;
  display: grid;
  gap: 0.55rem;
}

.inspector-grid {
  display: grid;
  gap: 0.32rem;
}

.studio-landing {
  margin: 0 auto 1rem;
  display: grid;
  gap: 0.75rem;
}

.preview-viewport {
  max-height: 560px;
  overflow: auto;
}

.preview-spacer td {
  padding: 0;
  border-top: none;
}

.preview-spacer-fill {
  display: block;
  width: 1px;
}

.preview-cell-editor {
  width: 100%;
  min-width: 120px;
  border: 1px solid #8fb3e3;
  border-radius: 6px;
  padding: 0.35rem 0.4rem;
}

.issue-select-cell {
  width: 2.4rem;
  text-align: center;
}

.issue-select-cell input {
  width: auto;
}

.report-gate {
  display: grid;
  gap: 0.45rem;
}

.gate-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem 0.72rem;
  background: #f8fbff;
}

.gate-card strong {
  text-transform: uppercase;
}

.gate-card.pass strong {
  color: var(--success);
}

.gate-card.warning strong {
  color: #8a5c00;
}

.gate-card.fail strong {
  color: var(--danger-text);
}

.studio-textarea {
  min-height: 180px;
  border: 1px solid #c4d3e5;
  border-radius: 10px;
  padding: 0.65rem;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.84rem;
  resize: vertical;
}

.diff-grid {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 980px) {
  .diff-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.diff-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem;
  background: #fbfdff;
}