:root {
  --bg: #f2efe8;
  --panel: #fbf8f1;
  --ink: #1a1f2b;
  --muted: #69758a;
  --line: #d8d1c2;
  --accent: #0d5b5b;
  --good: #1b8f3b;
  --bad: #c0392b;
  --neutral: #9b8772;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 10%, #fff9e7 0, transparent 35%),
    radial-gradient(circle at 85% 20%, #e8f3f3 0, transparent 30%),
    var(--bg);
  height: 100vh;
  overflow: hidden;
}

.topbar {
  display: grid;
  grid-template-columns: 1.5fr 2fr 2fr;
  gap: 12px;
  align-items: end;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(160deg, #fdf9f0, #e7efe9);
}

.brand h1 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
}

.brand p {
  margin: 2px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.toolbar label {
  display: flex;
  flex-direction: column;
  font-size: 0.75rem;
  color: var(--muted);
}

select,
button,
textarea,
input[type="file"] {
  font-family: inherit;
}

select,
button,
.file-upload {
  border: 1px solid #bcb3a4;
  background: #fffdf9;
  border-radius: 8px;
  padding: 8px 10px;
}

button {
  cursor: pointer;
}

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

.file-upload {
  cursor: pointer;
  position: relative;
  display: inline-flex;
  align-items: center;
}

.file-upload input {
  position: absolute;
  opacity: 0;
  inset: 0;
  cursor: pointer;
}

.user-chip {
  border: 1px solid #bcb3a4;
  background: #fff;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.78rem;
  color: #334056;
}

.layout {
  height: calc(100vh - 84px);
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.5fr;
  gap: 10px;
  padding: 10px;
}

.pane {
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.panel {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 14px;
  padding: 10px;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.panel h2 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}

.panel-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.panel-title-row h2 {
  margin: 0;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.zoom-controls button {
  padding: 4px 8px;
  font-size: 0.8rem;
}

.zoom-value {
  min-width: 44px;
  text-align: right;
  font-size: 0.78rem;
  color: var(--muted);
}

.grow {
  flex: 1;
}

.question-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
  gap: 6px;
  max-height: 180px;
  overflow: auto;
}

.q-group-label {
  grid-column: 1 / -1;
  margin-top: 4px;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.q-chip {
  padding: 6px;
  border: 1px solid #c9bfaf;
  border-radius: 8px;
  text-align: center;
  cursor: pointer;
  font-size: 0.82rem;
  background: #fff;
}

.q-chip.active {
  border-color: var(--accent);
  background: #dff1ef;
}

.q-chip.good {
  outline: 2px solid rgba(27, 143, 59, 0.25);
}

.q-chip.bad {
  outline: 2px solid rgba(192, 57, 43, 0.25);
}

.meta {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.answer-box {
  border: 1px dashed #b8ad9c;
  border-radius: 10px;
  padding: 8px;
  margin-bottom: 8px;
  background: #fffefb;
}

.latex-view {
  overflow: auto;
  flex: 1;
  border: 1px solid #e0d9cb;
  border-radius: 10px;
  padding: 8px;
  line-height: 1.5;
  background: #fff;
  font-size: var(--latex-font-size, 1rem);
}

.tex-center {
  text-align: center;
  margin: 8px 0;
}

.tex-table-wrap {
  overflow-x: auto;
  margin: 8px 0;
}

.tex-table {
  border-collapse: collapse;
  margin: 0 auto;
  min-width: 220px;
}

.tex-table td,
.tex-table th {
  border: 1px solid #d8d1c2;
  padding: 4px 8px;
}

.verdict-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.verdict-buttons {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}

.verdict-btn {
  border: 1px solid #bcb3a4;
  border-radius: 8px;
  padding: 6px 8px;
  cursor: pointer;
  background: #fff;
}

.verdict-btn.active.good {
  background: #e6f7ea;
  border-color: var(--good);
}

.verdict-btn.active.bad {
  background: #fdecea;
  border-color: var(--bad);
}

.verdict-btn.active.neutral {
  background: #f2ede5;
  border-color: var(--neutral);
}

textarea {
  width: 100%;
  border-radius: 8px;
  border: 1px solid #bcb3a4;
  padding: 8px;
  resize: vertical;
}

.status {
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--muted);
}

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

.image-pairs {
  overflow: auto;
  display: grid;
  gap: 10px;
}

.image-card {
  border: 1px solid #d7d0c2;
  border-radius: 10px;
  padding: 8px;
  background: #fff;
}

.image-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.image-slot {
  border: 1px solid #ece5d8;
  border-radius: 8px;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  overflow: auto;
  background: #fffcf7;
}

.image-slot img {
  max-width: 100%;
  max-height: 460px;
  object-fit: contain;
}

.tex-pdf-frame {
  width: 100%;
  min-height: 380px;
  border: 1px solid #e3dccf;
  border-radius: 6px;
  background: #fff;
}

.image-label {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.78rem;
}

#pdfFrame {
  width: calc(100% / var(--pdf-scale, 1));
  height: calc(100% / var(--pdf-scale, 1));
  border: 0;
  transform: scale(var(--pdf-scale, 1));
  transform-origin: top left;
  background: #fff;
}

.pdf-viewport {
  flex: 1;
  min-height: 0;
  overflow: auto;
  border: 1px solid #d8d0c2;
  border-radius: 10px;
  background: #fff;
}

@media (max-width: 1200px) {
  .layout {
    grid-template-columns: 1fr;
    height: auto;
    overflow: auto;
  }

  body {
    height: auto;
    overflow: auto;
  }

  #pdfFrame {
    min-height: 560px;
  }
}

.admin-layout {
  padding: 10px;
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
}

.admin-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 10px;
}

.admin-form-grid label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
}

.admin-list {
  max-height: 280px;
  overflow: auto;
  display: grid;
  gap: 8px;
}

.admin-item {
  border: 1px solid #ddd5c7;
  border-radius: 8px;
  padding: 8px;
  background: #fff;
}

.admin-actions {
  margin-top: 8px;
  display: flex;
  gap: 8px;
}

@media (max-width: 980px) {
  .admin-layout {
    grid-template-columns: 1fr;
  }

  .admin-form-grid {
    grid-template-columns: 1fr;
  }
}

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(980px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
}

.auth-card h1 {
  margin: 0;
}

.auth-sub {
  margin: 4px 0 16px;
  color: var(--muted);
}

.auth-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.auth-form {
  border: 1px solid #d7d0c2;
  border-radius: 12px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fff;
}

.auth-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
}

.auth-form input {
  border: 1px solid #bcb3a4;
  border-radius: 8px;
  padding: 8px;
}

.auth-error {
  margin-bottom: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  background: #fdecea;
  border: 1px solid #f5b6af;
  color: #7f2319;
}

@media (max-width: 860px) {
  .auth-grid {
    grid-template-columns: 1fr;
  }
}