:root {
  --bg-top: #f8efe0;
  --bg-bottom: #e8d6bb;
  --ink: #2e2417;
  --ink-soft: #6b5a43;
  --card: rgba(255, 249, 240, 0.8);
  --line: rgba(94, 66, 33, 0.25);
  --accent: #b25222;
  --accent-strong: #8f3710;
  --ok: #206244;
  --warn: #8b4a0b;
  --error: #9f1d26;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Manrope", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background: linear-gradient(155deg, var(--bg-top), var(--bg-bottom));
}

body {
  position: relative;
  overflow-x: hidden;
}

.background-glow {
  position: fixed;
  inset: -30vmax;
  pointer-events: none;
  background:
    radial-gradient(circle at 15% 20%, rgba(194, 102, 42, 0.24), transparent 35%),
    radial-gradient(circle at 80% 15%, rgba(112, 71, 23, 0.18), transparent 30%),
    radial-gradient(circle at 60% 85%, rgba(222, 165, 120, 0.22), transparent 32%);
  animation: drift 20s ease-in-out infinite alternate;
}

@keyframes drift {
  from {
    transform: translate3d(-1.5%, 0, 0);
  }
  to {
    transform: translate3d(1.5%, -1%, 0);
  }
}

.shell {
  position: relative;
  z-index: 1;
  width: min(1480px, 98.6vw);
  margin: 0.5rem auto 0.8rem;
  display: grid;
  gap: 0.38rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  backdrop-filter: blur(10px);
  box-shadow: 0 14px 35px rgba(56, 34, 14, 0.12);
}

.shell-header {
  padding: 0.42rem 0.72rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.shell-header-main {
  display: grid;
  gap: 0.08rem;
  align-content: center;
}

.eyebrow {
  margin: 0 0 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  color: var(--ink-soft);
}

h1,
h2 {
  font-family: "Alegreya", Georgia, serif;
  margin: 0;
}

h1 {
  font-size: clamp(1.25rem, 1.8vw, 1.7rem);
}

h2 {
  font-size: 1.2rem;
}

.subtitle {
  margin: 0;
  font-size: 0.77rem;
  color: var(--ink-soft);
  max-width: 52ch;
}

.compact-button {
  padding: 0.4rem 0.74rem;
  font-size: 0.78rem;
  line-height: 1.08;
}

.runtime-code {
  display: block;
  margin-top: 0.1rem;
  max-height: 220px;
}

.runtime-panel {
  gap: 0.55rem;
}

.runtime-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.runtime-panel-head h2 {
  font-size: 1.05rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.5rem;
  background: rgba(255, 252, 246, 0.78);
  display: grid;
  gap: 0.34rem;
  align-content: start;
}

.reader-stage {
  padding: 0.44rem;
}

.reader-primary {
  gap: 0.32rem;
}

.reader-headline {
  display: grid;
  gap: 0.08rem;
}

.reader-pickers {
  display: grid;
  grid-template-columns: minmax(300px, 1.5fr) minmax(180px, 0.85fr) minmax(180px, 0.85fr) auto auto;
  gap: 0.35rem;
  align-items: end;
}

.reader-pickers label {
  margin: 0;
}

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

label {
  display: grid;
  gap: 0.2rem;
  font-size: 0.86rem;
  color: var(--ink-soft);
}

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

input,
select {
  border-radius: 10px;
  border: 1px solid var(--line);
  padding: 0.52rem 0.6rem;
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
  width: 100%;
}

input:focus,
select:focus,
button:focus {
  outline: 2px solid rgba(178, 82, 34, 0.35);
  outline-offset: 2px;
}

button {
  cursor: pointer;
}

.primary-button,
.ghost-button {
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.47rem 0.84rem;
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.primary-button {
  background: linear-gradient(145deg, var(--accent), var(--accent-strong));
  color: #fff8ef;
  box-shadow: 0 8px 20px rgba(120, 48, 16, 0.28);
}

.primary-button:hover {
  transform: translateY(-1px);
}

.ghost-button {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.6);
}

.viewer-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.32rem;
  align-items: center;
  padding: 0.2rem 0.26rem;
  border: 1px solid rgba(128, 89, 47, 0.18);
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.54);
}

.viewer-toolbar-primary {
  align-items: center;
}

.viewer-nav-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  align-items: center;
}

.viewer-position-pill {
  margin: 0 auto 0 0;
  padding: 0.28rem 0.5rem;
  border: 1px solid rgba(128, 89, 47, 0.28);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.viewer-toolbar-search {
  align-items: flex-end;
}

.viewer-tools-panel {
  border: 1px solid rgba(128, 89, 47, 0.2);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.48);
  padding: 0.14rem 0.3rem;
}

.viewer-tools-panel > summary {
  cursor: pointer;
  font-size: 0.72rem;
  color: var(--ink-soft);
  list-style: none;
}

.viewer-tools-panel > summary::-webkit-details-marker {
  display: none;
}

.viewer-tools-stack {
  display: grid;
  gap: 0.28rem;
  padding: 0.2rem 0 0.04rem;
}

.viewer-toolbar-search-compact {
  padding: 0.2rem 0.28rem;
  gap: 0.34rem;
}

.viewer-tools-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 0.42rem;
  flex-wrap: wrap;
}

.viewer-settings-inline {
  display: grid;
  grid-template-columns: repeat(3, minmax(150px, 210px));
  gap: 0.28rem 0.42rem;
}

.viewer-settings-inline label {
  font-size: 0.7rem;
}

.viewer-history-actions {
  display: flex;
  gap: 0.28rem;
  flex-wrap: wrap;
  padding: 0.04rem 0;
}

.viewer-select-field {
  display: grid;
  gap: 0.1rem;
  font-size: 0.68rem;
  color: var(--ink-soft);
  min-width: min(180px, 100%);
  flex: 1 1 160px;
}

.viewer-select-field select {
  min-width: 0;
}

.viewer-search-field {
  display: grid;
  gap: 0.1rem;
  font-size: 0.68rem;
  color: var(--ink-soft);
  min-width: min(260px, 100%);
  flex: 1 1 220px;
}

.viewer-search-field input {
  min-width: 0;
}

.viewer-page-select {
  min-width: min(210px, 100%);
  flex: 1 1 190px;
}

.reader-status-row {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  min-height: 1.08rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.viewer-toolbar-primary .reader-status-row {
  margin-left: auto;
  min-width: 0;
}

#bookStatus,
#viewerStatus {
  display: inline;
  margin: 0;
  font-size: 0.76rem;
}

#bookStatus:empty,
#viewerStatus:empty {
  display: none;
}

.viewer-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 2.15fr);
  gap: 0.5rem;
  min-height: 74vh;
}

.viewer-page-rail {
  min-width: 0;
  opacity: 1;
  transform: translateX(0);
  transition: opacity 140ms ease, transform 160ms ease;
}

.viewer-grid.rail-collapsed {
  grid-template-columns: minmax(0, 1fr);
}

.viewer-grid.rail-collapsed .viewer-page-rail {
  display: none;
}

.viewer-page-list {
  border: 1px solid rgba(128, 89, 47, 0.2);
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.67);
  padding: 0.5rem;
  overflow: auto;
  display: grid;
  gap: 0.32rem;
  max-height: 74vh;
}

.viewer-page-item {
  display: block;
  width: 100%;
  text-align: left;
  border: 1px solid rgba(128, 89, 47, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  padding: 0.45rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.28;
}

.viewer-page-item.active {
  border-color: rgba(176, 88, 33, 0.7);
  box-shadow: inset 0 0 0 1px rgba(176, 88, 33, 0.2);
  background: rgba(255, 237, 215, 0.85);
}

.viewer-page-item.match {
  border-color: rgba(73, 121, 36, 0.56);
  background: rgba(229, 246, 217, 0.78);
}

.viewer-page-item.match.active {
  border-color: rgba(122, 92, 18, 0.75);
  box-shadow: inset 0 0 0 1px rgba(122, 92, 18, 0.2);
  background: rgba(255, 241, 190, 0.85);
}

.viewer-page-item small {
  display: block;
  color: var(--ink-soft);
  margin-top: 0.15rem;
  font-size: 0.72rem;
  letter-spacing: 0.01em;
}

.viewer-canvas {
  border: 1px solid rgba(128, 89, 47, 0.2);
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.67);
  padding: 0.35rem;
  min-height: 72vh;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.viewer-frame {
  width: 100%;
  min-height: 72vh;
  border: 1px solid rgba(128, 89, 47, 0.2);
  border-radius: 8px;
  background: white;
}

.viewer-text {
  margin: 0;
  display: none;
  border: 1px solid rgba(73, 58, 42, 0.2);
  background: rgba(29, 18, 10, 0.87);
  color: #f7e8d5;
  border-radius: 8px;
  padding: 0.7rem;
  max-height: 640px;
  overflow: auto;
  font-size: 0.8rem;
  line-height: 1.38;
  white-space: pre-wrap;
  word-break: break-word;
}

.viewer-text.visible {
  display: block;
}

.debug-shell {
  overflow: hidden;
}

.debug-launch-row {
  display: flex;
  justify-content: flex-end;
  padding: 0 0.1rem;
}

.debug-shell > summary {
  cursor: pointer;
  list-style: none;
  padding: 0.9rem 1rem;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid rgba(94, 66, 33, 0.14);
  background: rgba(250, 241, 229, 0.82);
}

.debug-shell > summary::-webkit-details-marker {
  display: none;
}

.debug-content {
  padding: 0.8rem;
  display: grid;
  gap: 0.8rem;
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.output-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.output-panel {
  min-height: 140px;
}

.full-width {
  grid-column: 1 / -1;
}

.status {
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  font-weight: 600;
}

.status.idle {
  background: rgba(82, 92, 103, 0.1);
  color: #3e4b5c;
}

.status.running {
  background: rgba(139, 74, 11, 0.16);
  color: var(--warn);
}

.status.success {
  background: rgba(32, 98, 68, 0.14);
  color: var(--ok);
}

.status.error {
  background: rgba(159, 29, 38, 0.14);
  color: var(--error);
}

.library-view {
  display: grid;
  gap: 0.45rem;
}

.library-section {
  border: 1px solid rgba(128, 89, 47, 0.2);
  border-radius: 11px;
  padding: 0.55rem;
  background: rgba(255, 255, 255, 0.6);
}

.library-section h3 {
  margin: 0;
  font-size: 0.95rem;
}

.library-items {
  margin: 0.4rem 0 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.22rem;
  font-size: 0.85rem;
}

.helper {
  margin: 0;
  font-size: 0.84rem;
  color: var(--ink-soft);
}

.code-block {
  margin: 0;
  border: 1px solid rgba(73, 58, 42, 0.2);
  background: rgba(29, 18, 10, 0.87);
  color: #f7e8d5;
  border-radius: 10px;
  padding: 0.7rem;
  max-height: 320px;
  overflow: auto;
  font-size: 0.76rem;
  line-height: 1.35;
}

@media (max-width: 1120px) {
  .reader-pickers {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }

  .reader-pickers .viewer-select-field {
    min-width: 0;
    flex: 1 1 auto;
  }

  .reader-pickers .ghost-button,
  .reader-pickers .primary-button {
    width: 100%;
  }

  .viewer-settings-inline {
    grid-template-columns: repeat(2, minmax(150px, 1fr));
  }
}

@media (max-width: 960px) {
  .action-grid,
  .output-grid,
  .viewer-grid {
    grid-template-columns: 1fr;
  }

  .shell-header {
    align-items: flex-start;
  }

  .shell-header-actions {
    margin-left: 0;
    width: 100%;
  }

  .viewer-grid {
    min-height: auto;
  }

  .viewer-toolbar {
    padding: 0.35rem;
  }

  .viewer-page-list {
    max-height: 280px;
  }

  .viewer-frame {
    min-height: 360px;
  }

  .viewer-canvas {
    min-height: 380px;
  }

  .viewer-select-field {
    min-width: 100%;
    flex-basis: 100%;
  }

  .reader-pickers {
    grid-template-columns: 1fr;
  }

  .viewer-search-field {
    min-width: 100%;
    flex-basis: 100%;
  }

  .viewer-toolbar-search .ghost-button {
    width: auto;
  }

  .viewer-settings-inline {
    grid-template-columns: 1fr;
  }

  .reader-status-row {
    white-space: normal;
    flex-wrap: wrap;
    min-height: 0;
  }

  .runtime-panel-head {
    align-items: stretch;
  }

  .runtime-panel-head .ghost-button {
    width: 100%;
  }
}