:root {
  color-scheme: light;
  --ink: #16211f;
  --muted: #66736f;
  --line: #d7dedb;
  --panel: #ffffff;
  --soft: #eef3f1;
  --accent: #b53f55;
  --accent-dark: #81283a;
  --teal: #176b72;
  --gold: #c28a27;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: #f7f5f2;
}

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

button {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 8px;
  min-height: 40px;
  padding: 0 14px;
  cursor: pointer;
}

button:hover {
  border-color: var(--teal);
}

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

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 28px 16px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.meta {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(28px, 4vw, 44px);
}

nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-button.active,
.segmented button.active {
  background: var(--ink);
  color: white;
  border-color: var(--ink);
}

main {
  padding: 20px;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(190px, 240px) minmax(360px, 1fr) minmax(260px, 340px);
  gap: 16px;
  align-items: start;
}

.control-panel,
.answer-panel,
.upload-form,
.bulk-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.control-panel,
.answer-panel,
.upload-form {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 40px;
  padding: 9px 10px;
  background: #fff;
  color: var(--ink);
}

textarea {
  min-height: 96px;
  resize: vertical;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.segmented button {
  border: 0;
  border-radius: 0;
}

.slide-stage {
  min-width: 0;
}

.slide-toolbar {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 4px 12px;
}

.slide-label {
  margin: 6px 0 0;
  color: var(--teal);
  font-size: 14px;
  font-weight: 800;
}

.zoom-controls {
  display: grid;
  grid-template-columns: 40px 58px 40px;
  align-items: center;
  text-align: center;
  gap: 6px;
  color: var(--muted);
}

.gallery-tabs {
  display: flex;
  gap: 8px;
  padding: 0 4px 10px;
}

.gallery-tabs button {
  min-height: 34px;
  padding: 0 12px;
}

.gallery-tabs button.active {
  border-color: var(--accent);
  background: #fff4f6;
  color: var(--accent-dark);
  font-weight: 800;
}

.slide-strip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 4px 0;
}

.slide-strip button {
  display: grid;
  grid-template-columns: 44px minmax(80px, 150px);
  align-items: center;
  gap: 8px;
  min-height: 52px;
  padding: 5px 9px 5px 5px;
  text-align: left;
  flex: 0 0 auto;
}

.slide-strip button.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.slide-strip img {
  width: 44px;
  height: 38px;
  border-radius: 6px;
  object-fit: cover;
}

.slide-strip span {
  overflow: hidden;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.viewer-shell {
  position: relative;
}

.viewer {
  overflow: auto;
  height: min(72vh, 760px);
  min-height: 430px;
  background: #111;
  border: 1px solid #25312d;
  border-radius: 8px;
}

.slide-nav {
  position: absolute;
  z-index: 3;
  top: 50%;
  translate: 0 -50%;
  width: 42px;
  height: 58px;
  min-height: 58px;
  padding: 0;
  border-color: rgba(255, 255, 255, 0.68);
  background: rgba(255, 255, 255, 0.34);
  color: var(--ink);
  font-size: 28px;
  font-weight: 800;
  opacity: 0.38;
  transition: background 160ms ease, border-color 160ms ease, opacity 160ms ease;
}

.slide-nav:hover,
.slide-nav:focus-visible {
  border-color: rgba(255, 255, 255, 0.95);
  background: rgba(255, 255, 255, 0.92);
  opacity: 1;
}

.slide-nav:disabled {
  opacity: 0.16;
  cursor: default;
}

.slide-nav.prev {
  left: 12px;
}

.slide-nav.next {
  right: 12px;
}

.viewer img {
  display: block;
  width: 100%;
  min-width: 380px;
  transform-origin: top left;
}

.feature-entry {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  min-height: 38px;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid #cfb7bd;
  background: #fff4f6;
  color: var(--accent-dark);
  border-radius: 999px;
  min-height: 32px;
  padding: 0 10px;
  font-size: 13px;
  font-weight: 700;
}

.chip button {
  min-height: 22px;
  width: 22px;
  padding: 0;
  border-radius: 50%;
}

.answer-block {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.answer-hint {
  margin: 8px 0;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

.answer-block ul {
  padding-left: 18px;
}

.library-tools {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(180px, 260px);
  gap: 12px;
  margin-bottom: 16px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 14px;
}

.condition-header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 4px 0 6px;
}

.condition-card h3 {
  min-height: 2.4em;
}

.case-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.case-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}

.case-card-content {
  display: grid;
  gap: 8px;
  padding: 12px;
}

.case-card footer {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 9px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
}

.upload-layout {
  display: grid;
  grid-template-columns: minmax(360px, 1fr) minmax(260px, 360px);
  gap: 16px;
  align-items: start;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 12px;
}

.bulk-panel {
  display: grid;
  gap: 12px;
}

pre {
  white-space: pre-wrap;
  min-height: 120px;
  margin: 0;
  background: #17211f;
  color: #e8f0ed;
  border-radius: 8px;
  padding: 12px;
  font-size: 13px;
}

@media (max-width: 1020px) {
  .workspace,
  .upload-layout {
    grid-template-columns: 1fr;
  }

  .viewer {
    height: 58vh;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: start;
    flex-direction: column;
  }

  main {
    padding: 12px;
  }

  .library-tools,
  .two-col {
    grid-template-columns: 1fr;
  }
}