:root {
  --bg: #edf2fb;
  --surface: #ffffff;
  --surface-soft: #f7fafe;
  --text: #13243b;
  --muted: #586b84;
  --border: #d7e1ee;
  --primary: #0059d6;
  --primary-dark: #0047ab;
  --secondary: #17395f;
  --danger: #b42334;
  --success-bg: #e8f8ef;
  --success-text: #17623d;
  --warn-bg: #fff3db;
  --warn-text: #845800;
  --danger-bg: #ffe7e9;
  --danger-text: #a12231;
  --ring: #cfe2ff;
  --app-shell-max: 1500px;
  --rail-divider-color: #e5e7eb;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "IBM Plex Sans", "Segoe UI", "Noto Sans KR", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 2%, #dfe9ff 0%, rgba(223, 233, 255, 0) 36%),
    radial-gradient(circle at 88% 0%, #d7f1ff 0%, rgba(215, 241, 255, 0) 32%),
    var(--bg);
}

.hero {
  text-align: center;
  padding-block: 2.2rem 1.2rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.85rem, 2.2vw, 2.35rem);
}

.hero p {
  margin: 0.6rem 0 0;
  color: var(--muted);
}

.layout {
  margin: 0 auto;
  padding-bottom: 1.4rem;
  display: grid;
  gap: 1rem;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: 0 8px 22px rgba(15, 34, 62, 0.05);
  padding: 1rem;
}

.panel h2,
.panel h3 {
  margin: 0;
}

.entry-panel {
  display: grid;
  gap: 0.9rem;
}

.entry-header {
  display: grid;
  gap: 0.4rem;
}

.entry-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: 1fr;
}

.entry-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem;
  background: var(--surface-soft);
  display: grid;
  gap: 0.68rem;
}

.workspace {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 1200px) {
  .workspace {
    grid-template-columns: minmax(240px, 280px) minmax(0, 1fr) minmax(300px, 340px);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .entry-grid {
    grid-template-columns: 1fr 1fr;
  }
}

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

.small {
  font-size: 0.9rem;
}

.small-label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
}

input,
select,
button {
  font: inherit;
}

input[type="text"],
input[type="number"],
input[type="file"],
select {
  width: 100%;
  border: 1px solid #c6d4e6;
  border-radius: 8px;
  padding: 0.56rem 0.66rem;
  background: #fff;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="file"]:focus,
select:focus {
  border-color: var(--primary);
  outline: 2px solid var(--ring);
}

button {
  border: none;
  border-radius: 8px;
  padding: 0.58rem 0.84rem;
  font-weight: 600;
  color: #fff;
  background: var(--primary);
  cursor: pointer;
}

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

button.secondary {
  background: var(--secondary);
}

button.secondary:hover:not(:disabled) {
  background: #132f4f;
}

button.ghost {
  border: 1px solid #b8c9df;
  background: #fff;
  color: #22364f;
}

button.ghost:hover:not(:disabled) {
  background: #f3f7fd;
}

button.ghost.danger {
  border-color: #f3c1c8;
  color: var(--danger-text);
}

button.ghost.danger:hover:not(:disabled) {
  background: #fff0f2;
}

button.mini {
  padding: 0.42rem 0.64rem;
  font-size: 0.85rem;
}

button:disabled {
  opacity: 0.56;
  cursor: not-allowed;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.58rem;
}

.button-row.compact {
  gap: 0.44rem;
}

.button-row.wrap-end {
  justify-content: flex-end;
}

.drop-zone {
  border: 1px dashed #97adcb;
  border-radius: 10px;
  padding: 0.88rem;
  text-align: center;
  color: #59708c;
  background: #f4f8ff;
  cursor: pointer;
}

.drop-zone:hover,
.drop-zone:focus,
.drop-zone.is-over {
  border-color: var(--primary);
  background: #eaf2ff;
  color: #27466f;
  outline: none;
}

.section-title-row {
  display: flex;
  gap: 0.7rem;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.section-title-row.top-align {
  align-items: flex-start;
}

.message {
  border-radius: 10px;
  padding: 0.72rem 0.8rem;
  font-size: 0.92rem;
}

.message.error {
  border: 1px solid #ffc4cb;
  color: var(--danger-text);
  background: var(--danger-bg);
}

.message.warn {
  border: 1px solid #ffdca0;
  color: var(--warn-text);
  background: var(--warn-bg);
}

.message.success {
  border: 1px solid #baeacc;
  color: var(--success-text);
  background: var(--success-bg);
}

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

.insert-controls {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fbfdff;
  padding: 0.58rem;
  display: grid;
  gap: 0.5rem;
}

.source-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.source-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.58rem 0.65rem;
  background: #f8fbff;
  display: grid;
  gap: 0.34rem;
}

.source-item__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.source-item__name {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 700;
  word-break: break-word;
}

.source-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  margin-top: 0.3rem;
  background: var(--source-color, #0059d6);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--source-color, #0059d6) 15%, #ffffff);
}

.source-item__meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.83rem;
}

.canvas-panel {
  display: grid;
  gap: 0.7rem;
}

.canvas-viewport {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: repeating-linear-gradient(
      45deg,
      rgba(11, 49, 101, 0.025),
      rgba(11, 49, 101, 0.025) 8px,
      rgba(11, 49, 101, 0.015) 8px,
      rgba(11, 49, 101, 0.015) 16px
    ),
    #f8fbff;
  min-height: 430px;
  max-height: 72vh;
  overflow: auto;
  padding: 0.7rem;
}

.page-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(158px, 1fr));
  gap: 0.64rem;
  align-content: start;
}

.grid-spacer {
  grid-column: 1 / -1;
  height: var(--spacer-height, 0px);
  pointer-events: none;
}

.page-card {
  border: 1px solid #c7d7eb;
  border-radius: 11px;
  background: #fff;
  padding: 0.46rem;
  display: grid;
  gap: 0.44rem;
  user-select: none;
  cursor: pointer;
  transition: border-color 110ms ease, box-shadow 110ms ease, transform 110ms ease;
}

.page-card:hover {
  border-color: #8fb0d8;
  box-shadow: 0 4px 14px rgba(17, 56, 109, 0.08);
  transform: translateY(-1px);
}

.page-card:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 1px;
}

.page-card.is-selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px #d6e6ff;
  background: #f4f9ff;
}

.page-card.drop-before {
  box-shadow: inset 0 3px 0 0 var(--primary);
}

.page-card.drop-after {
  box-shadow: inset 0 -3px 0 0 var(--primary);
}

.page-card.is-drag-origin {
  opacity: 0.5;
}

.page-thumb-frame {
  border: 1px solid #dae5f4;
  border-radius: 8px;
  background: #fff;
  display: grid;
  place-items: center;
  min-height: 170px;
  position: relative;
  overflow: hidden;
}

.page-thumb {
  max-width: 100%;
  max-height: 100%;
  display: block;
  transform: rotate(var(--rotation, 0deg));
  transform-origin: center;
  transition: transform 120ms ease;
}

.thumb-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #466088;
  background:
    linear-gradient(0deg, rgba(235, 243, 255, 0.95), rgba(248, 251, 255, 0.95)),
    repeating-linear-gradient(0deg, #e3ecfa, #e3ecfa 3px, #f6f9fe 3px, #f6f9fe 12px);
}

.page-caption {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.source-badge,
.meta-pill {
  border-radius: 999px;
  padding: 0.16rem 0.46rem;
  font-size: 0.74rem;
  font-weight: 700;
}

.source-badge {
  color: #fff;
  background: var(--source-color, #0059d6);
}

.meta-pill {
  color: #2b4568;
  background: #e8f1ff;
}

.selection-marquee {
  position: absolute;
  border: 1px solid #0d62d8;
  background: rgba(13, 98, 216, 0.12);
  border-radius: 4px;
  pointer-events: none;
  z-index: 20;
}

.placeholder-line {
  margin: 0;
  padding: 1.3rem 0.8rem;
  color: var(--muted);
  text-align: center;
}

.inspector-panel {
  display: grid;
  gap: 0.85rem;
}

.status-grid {
  display: grid;
  gap: 0.56rem;
}

.status-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-soft);
  padding: 0.62rem;
  display: grid;
  gap: 0.2rem;
}

.status-item span {
  color: var(--muted);
  font-size: 0.82rem;
}

.status-item strong {
  font-size: 0.92rem;
  word-break: break-word;
}

.inspector-block {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fbfdff;
  padding: 0.68rem;
  display: grid;
  gap: 0.6rem;
}

.inline-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.inline-toggle input {
  width: auto;
  margin: 0;
}

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

.preset-history {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f7fbff;
  padding: 0.58rem;
  display: grid;
  gap: 0.5rem;
}

.recent-preset-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.38rem;
}

.recent-preset-item {
  border: 1px solid #d8e4f4;
  border-radius: 8px;
  background: #ffffff;
  padding: 0.46rem 0.52rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.48rem;
}

.recent-preset-text {
  font-size: 0.84rem;
  color: #1f3450;
  line-height: 1.32;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.metadata-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.4rem;
}

.metadata-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #f6faff;
  padding: 0.48rem 0.58rem;
  display: grid;
  gap: 0.18rem;
}

.metadata-key {
  font-size: 0.75rem;
  font-weight: 700;
  color: #4f627c;
}

.metadata-value {
  font-size: 0.86rem;
  color: #1f2f49;
  word-break: break-word;
}

.metadata-empty {
  color: var(--muted);
  font-size: 0.86rem;
}

.button-grid {
  display: grid;
  gap: 0.48rem;
}

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

@media (max-width: 560px) {
  .button-grid.two-col {
    grid-template-columns: 1fr;
  }
}

.export-bar {
  position: sticky;
  bottom: 0;
  z-index: 30;
  margin: 0 auto 1rem;
}

.export-bar__inner {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(5px);
  box-shadow: 0 -6px 22px rgba(12, 28, 50, 0.08);
  padding: 0.7rem 0.78rem;
  display: grid;
  gap: 0.6rem;
}

.export-bar__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.72rem;
  flex-wrap: wrap;
}

.export-bar__summary {
  min-width: 0;
}

.export-bar__summary p {
  margin: 0;
}

.export-bar__toggle {
  flex-shrink: 0;
}

.export-bar__body {
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  align-items: start;
  max-height: min(38vh, 22rem);
  overflow: auto;
  overscroll-behavior: contain;
  padding-right: 0.15rem;
}

.export-bar__body > .muted.small,
.export-bar__body > .naming-presets {
  grid-column: 1 / -1;
}

.export-bar__actions {
  border-top: 1px solid var(--border);
  padding-top: 0.6rem;
}

.export-bar.is-collapsed .export-bar__inner {
  gap: 0.45rem;
}

.export-bar.is-collapsed .export-bar__actions {
  border-top: 0;
  padding-top: 0;
}

.export-template {
  width: 100%;
  max-width: 380px;
}

.naming-presets {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f8fbff;
  padding: 0.62rem;
  display: grid;
  gap: 0.48rem;
}

@media (max-width: 640px) {
  .export-bar__toggle {
    width: 100%;
  }

  .export-bar__body {
    max-height: min(46vh, 20rem);
  }

  .export-bar__actions {
    justify-content: stretch;
  }

  .export-bar__actions button {
    flex: 1 1 100%;
  }
}

.guide-layout {
  margin: 0 auto 1.4rem;
  display: grid;
  gap: 0.8rem;
  grid-template-columns: 1fr;
}

@media (min-width: 860px) {
  .guide-layout {
    grid-template-columns: 1fr 1fr;
  }
}

.guide-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  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 {
  margin: 0.55rem 0 0;
  padding-left: 1.15rem;
}

.faq-card details {
  margin-top: 0.5rem;
  border: 1px solid #dce7f7;
  border-radius: 10px;
  padding: 0.52rem 0.62rem;
  background: #f9fcff;
}

.faq-card summary {
  cursor: pointer;
  font-weight: 600;
  color: #24466f;
}

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

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

.tool-footer {
  margin-top: 56px;
  padding-bottom: 2rem;
  color: #455267;
}

.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: 1.6;
  font-size: 0.94rem;
}

.hidden {
  display: none !important;
}