/* Plain CSS for both screens. Slate/sky palette, no framework. */

:root {
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-900: #0f172a;
  --sky-50: #f0f9ff;
  --sky-500: #0ea5e9;
  --sky-600: #0284c7;
  --sky-700: #0369a1;
  --amber-50: #fffbeb;
  --amber-100: #fef3c7;
  --amber-200: #fde68a;
  --amber-300: #fcd34d;
  --amber-800: #92400e;
  --emerald-50: #ecfdf5;
  --emerald-300: #6ee7b7;
  --emerald-500: #10b981;
  --emerald-600: #059669;
  --red-50: #fef2f2;
  --red-100: #fee2e2;
  --red-300: #fca5a5;
  --red-500: #ef4444;
  --red-700: #b91c1c;
  --red-800: #991b1b;
  --orange-50: #fff7ed;
  --orange-100: #ffedd5;
  --orange-500: #f97316;
  --orange-800: #9a3412;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--slate-900);
  background: var(--slate-50);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans Malayalam", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

h1 { font-size: 1.05rem; font-weight: 600; margin: 0; }
h2 { font-size: 1.1rem; font-weight: 600; margin: 0; }
code { font-family: var(--mono); font-size: 0.9em; }

/* ---- utilities ---------------------------------------------------------- */

.row { display: flex; }
.wrap { flex-wrap: wrap; }
.center { align-items: center; }
.grow { flex: 1; min-width: 0; }
.min-w-0 { min-width: 0; }
.right { margin-left: auto; }
.gap-1 { gap: 0.25rem; } .gap-2 { gap: 0.5rem; } .gap-3 { gap: 0.75rem; }
.mt-1 { margin-top: 0.25rem; } .mt-2 { margin-top: 0.5rem; } .mt-3 { margin-top: 0.75rem; }
.p-2 { padding: 0.5rem; } .p-3 { padding: 0.75rem; }
.stack-1 > * + * { margin-top: 0.25rem; }
.stack-2 > * + * { margin-top: 0.5rem; }
.small { font-size: 0.875rem; }
.xsmall { font-size: 0.75rem; }
.muted { color: var(--slate-500); }
.strong { font-weight: 500; }
.mono { font-family: var(--mono); font-size: 13px; }
.warn { color: var(--amber-800); }
.danger { color: var(--red-700); }
.narrow { max-width: 24rem; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hide-narrow { display: none; }
@media (min-width: 1100px) { .hide-narrow { display: inline; } }

.card { border: 1px solid var(--slate-200); border-radius: 0.5rem; background: #fff; }

a.link, .linkish {
  color: var(--sky-700);
  text-decoration: none;
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  cursor: pointer;
}
a.link:hover, .linkish:hover { text-decoration: underline; }

.button {
  display: inline-block;
  border: 1px solid var(--slate-300);
  background: #fff;
  border-radius: 0.375rem;
  padding: 0.35rem 0.75rem;
  font: inherit;
  font-size: 0.875rem;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}
.button:hover { background: var(--slate-100); }
.button:disabled { opacity: 0.5; cursor: default; }
.button.tiny { padding: 0.1rem 0.4rem; font-size: 0.75rem; }
.button.primary { background: var(--sky-600); border-color: var(--sky-600); color: #fff; }
.button.primary:hover { background: var(--sky-700); }
.button.ok { background: var(--emerald-600); border-color: var(--emerald-600); color: #fff; }
.button.ok:hover { background: #047857; }
.button.danger-outline { border-color: var(--red-300); color: var(--red-700); }
.button.danger-outline:hover { background: var(--red-50); }
.button.sky-outline { border-color: #7dd3fc; color: var(--sky-700); }
.button.sky-outline:hover { background: var(--sky-50); }
.button.ghost { border-color: transparent; color: var(--slate-500); }
.button.ghost:hover { color: var(--red-700); background: transparent; }

input, select, textarea {
  border: 1px solid var(--slate-300);
  border-radius: 0.25rem;
  padding: 0.25rem 0.5rem;
  font: inherit;
  font-size: 0.875rem;
  background: #fff;
  width: 100%;
}
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--sky-500); }
select.tiny { width: auto; padding: 0.1rem 0.25rem; font-size: 0.75rem; }

.badge { display: inline-block; border-radius: 9999px; padding: 0.1rem 0.5rem; font-size: 0.75rem; font-weight: 500; background: var(--slate-100); color: var(--slate-700); }
.badge-rendering, .badge-extracting, .badge-uploading, .badge-verifying { background: #e0f2fe; color: #075985; }
.badge-review, .badge-flagged { background: var(--amber-100); color: var(--amber-800); }
.badge-partial { background: var(--orange-100); color: var(--orange-800); }
.badge-approved { background: #d1fae5; color: #065f46; }
.badge-failed, .badge-rejected { background: var(--red-100); color: var(--red-800); }

.progress { height: 6px; border-radius: 3px; background: var(--slate-200); overflow: hidden; }
.progress-bar { height: 100%; background: var(--sky-500); transition: width 0.3s; }
.progress-bar.pulse { width: 33%; animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.banner { padding: 0.5rem 1rem; font-size: 0.875rem; border-bottom: 1px solid transparent; }
.banner.info { background: var(--sky-50); border-color: #bae6fd; color: #0c4a6e; }
.banner.warn { background: var(--orange-50); border-color: #fed7aa; color: var(--orange-800); }
.banner.danger { background: var(--red-50); border-color: var(--red-300); color: var(--red-800); }

/* ---- papers screen ------------------------------------------------------ */

.page { max-width: 64rem; margin: 0 auto; padding: 2rem 1rem; }
.right-link { float: right; }
.page > p.lead { color: var(--slate-600); font-size: 0.875rem; margin-top: 0.25rem; }
.warnings { margin-top: 1rem; padding: 0.75rem 0.75rem 0.75rem 1.5rem; border: 1px solid var(--amber-300); background: var(--amber-50); color: #78350f; border-radius: 0.375rem; font-size: 0.875rem; }
.warnings li + li { margin-top: 0.25rem; }

#drop {
  margin-top: 1.5rem;
  padding: 2rem;
  text-align: center;
  border: 2px dashed var(--slate-300);
  border-radius: 0.5rem;
  background: #fff;
  cursor: pointer;
}
#drop:hover { border-color: var(--slate-400); }
#drop.dragging { border-color: var(--sky-500); background: var(--sky-50); }
#drop p { margin: 0; }
#drop p + p { margin-top: 0.25rem; font-size: 0.875rem; color: var(--slate-500); }

#error { margin-top: 1rem; border-radius: 0.375rem; background: var(--red-50); padding: 0.75rem; font-size: 0.875rem; color: var(--red-800); }

.rows { list-style: none; margin: 0; padding: 0; }
.row-item { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; padding: 0.75rem 1rem; }
.row-item + .row-item { border-top: 1px solid var(--slate-200); }

/* ---- review screen ------------------------------------------------------ */

.app { display: flex; flex-direction: column; height: 100vh; }
#head { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; padding: 0.5rem 1rem; background: #fff; border-bottom: 1px solid var(--slate-200); }
.cols { display: flex; flex: 1; min-height: 0; }

#list { display: flex; flex-direction: column; width: 14rem; flex-shrink: 0; background: #fff; border-right: 1px solid var(--slate-200); }
.list-head { padding: 0.5rem; border-bottom: 1px solid var(--slate-200); }
.list-body { flex: 1; overflow-y: auto; list-style: none; margin: 0; padding: 0; font-size: 0.875rem; }
.list-item { display: flex; align-items: center; gap: 0.5rem; width: 100%; padding: 0.35rem 0.75rem; border: 0; background: none; font: inherit; text-align: left; cursor: pointer; }
.list-item:hover { background: var(--slate-50); }
.list-item.is-selected { background: var(--sky-50); font-weight: 500; }
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; background: var(--slate-300); }
.dot-flagged { background: #f59e0b; }
.dot-approved { background: var(--emerald-500); }
.dot-rejected { background: var(--red-500); }

#viewer { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; padding: 0.5rem 0.75rem; background: #fff; border-bottom: 1px solid var(--slate-200); }
.page-scroll { flex: 1; overflow: auto; background: var(--slate-200); padding: 0.75rem; }
.page-sheet { position: relative; margin: 0 auto; width: 100%; max-width: 48rem; background: #fff; box-shadow: 0 1px 3px rgb(0 0 0 / 0.2); }
.page-sheet img { display: block; width: 100%; }
.box { position: absolute; pointer-events: none; border: 2px solid; }
.box-region { border-color: rgb(14 165 233 / 0.8); background: rgb(56 189 248 / 0.1); border-radius: 2px; }
.box-image { border-color: var(--orange-500); background: rgb(251 146 60 / 0.1); }
.box-failed { border-color: var(--red-500); background: rgb(248 113 113 / 0.1); }
.box-label { position: absolute; top: -1.25rem; left: 0; padding: 0 0.25rem; border-radius: 2px; font-size: 10px; color: #fff; background: var(--orange-500); }
.box-failed .box-label { background: var(--red-500); }

#side { width: 34rem; flex-shrink: 0; overflow-y: auto; background: #fff; border-left: 1px solid var(--slate-200); padding: 1rem; }

.issues { list-style: none; margin: 0.75rem 0 0; padding: 0.75rem; border: 1px solid var(--amber-300); background: var(--amber-50); border-radius: 0.375rem; font-size: 0.875rem; color: #451a03; }
.issues li + li { margin-top: 0.375rem; }
.issues .code { margin-right: 0.25rem; padding: 0 0.25rem; border-radius: 0.25rem; background: var(--amber-200); font-family: var(--mono); font-size: 11px; }
.suggestion { display: flex; align-items: flex-start; gap: 0.5rem; margin-top: 0.25rem; padding: 0.25rem 0.5rem; border-radius: 0.25rem; background: rgb(255 255 255 / 0.7); }

/* editor */
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.5rem; }
.span-3 { grid-column: span 3; }
.field { display: block; }
.field > span, .field-label { display: block; margin-bottom: 0.125rem; font-size: 0.75rem; font-weight: 500; color: var(--slate-600); }
.tiny-input { width: 3rem; flex-shrink: 0; align-self: flex-start; }
.marks-input { width: 4rem; flex-shrink: 0; align-self: flex-start; }
.subs { margin-top: 0.25rem; padding-left: 1.5rem; }
.subs > * + * { margin-top: 0.25rem; }
.x { border: 0; background: none; color: var(--slate-400); cursor: pointer; padding: 0 0.25rem; font-size: 1rem; width: auto; }
.x:hover { color: var(--red-700); }

/* ---- the question preview ----------------------------------------------- */

.preview > * + * { margin-top: 1rem; }
.options, .parts, .subparts { list-style: none; margin: 0; padding: 0; }
.options > li { display: flex; gap: 0.5rem; padding: 0.25rem 0.5rem; border-radius: 0.25rem; }
.options > li.is-answer { background: var(--emerald-50); box-shadow: inset 0 0 0 1px var(--emerald-300); }
.option-key, .part-label { font-weight: 500; color: var(--slate-500); }
.parts > li, .subparts > li { display: flex; gap: 0.5rem; }
.parts > li + li { margin-top: 0.5rem; }
.subparts { margin-top: 0.25rem; }
.subparts > li + li { margin-top: 0.25rem; }
.marks { font-size: 0.75rem; color: var(--slate-500); }
.solution { border: 1px solid var(--slate-200); background: var(--slate-50); border-radius: 0.375rem; padding: 0.75rem 1rem; font-size: 0.875rem; }
.thumbs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.5rem 0; }
.thumb { max-width: 100%; border: 1px solid var(--slate-200); border-radius: 0.25rem; background: #fff; }
.thumb-error { border: 1px solid var(--red-300); background: var(--red-50); border-radius: 0.25rem; padding: 0.25rem 0.5rem; font-size: 0.75rem; color: var(--red-800); }

/* Question text rendered from the extraction */
.math-text { line-height: 1.7; overflow-wrap: anywhere; }
.math-text.inline { display: inline; }
.math-text p { margin: 0.45em 0; }
.math-text > :first-child { margin-top: 0; }
.math-text > :last-child { margin-bottom: 0; }
.math-text .figure { margin: 0.9em 0; }
.math-text .equation { margin: 0.7em 0; text-align: center; }
.math-text .equation .katex-display { margin: 0; }
.math-text .katex-display { margin: 0.5em 0; overflow-x: auto; overflow-y: hidden; }
.math-text table { border-collapse: collapse; margin: 0.5em 0; }
.math-text th, .math-text td { border: 1px solid var(--slate-300); padding: 0.25em 0.5em; }
.math-text .inline-image {
  display: inline-block;
  max-width: 100%;
  height: auto;
  margin: 0.25rem 0;
  vertical-align: middle;
  border: 1px solid var(--slate-200);
  border-radius: 0.25rem;
  background: #fff;
}
.math-text .missing-image { color: var(--red-700); font-family: var(--mono); font-size: 0.8em; }