:root {
  --bg: #12151a;
  --card: #1c2129;
  --text: #eef1f6;
  --muted: #9aa3b2;
  --accent: #3d8bfd;
  --ok: #3ecf8e;
  --danger: #ef6b6b;
  --line: #2a313c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 10% -10%, #1a2433, var(--bg));
  color: var(--text);
  min-height: 100vh;
}
#app { max-width: 1100px; margin: 0 auto; padding: 24px; }
.top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; }
h1 { margin: 0; font-size: 28px; }
h2 { margin: 0 0 12px; font-size: 18px; }
h3.section-label {
  margin: 18px 0 8px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 600;
}
.sub { margin: 4px 0 0; color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}
label { display: block; margin: 10px 0; color: var(--muted); font-size: 13px; }
input, textarea {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #0f1318;
  color: var(--text);
}
button {
  border: 1px solid var(--line);
  background: #242b36;
  color: var(--text);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  font: inherit;
}
button.primary { background: var(--accent); border-color: transparent; }
button:hover { filter: brightness(1.08); }
button:disabled { opacity: 0.45; cursor: default; filter: none; }
.hidden { display: none !important; }
.error { color: var(--danger); min-height: 1.2em; }
.row { display: flex; gap: 12px; align-items: center; }
.between { justify-content: space-between; }
.queue { display: grid; gap: 10px; }
.queue-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.queue-item:hover { border-color: var(--accent); }
.queue-item.new {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.queue-item.graded-item { opacity: 0.92; }
.badge {
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 999px;
  background: #2a3340;
  color: var(--muted);
  white-space: nowrap;
}
.badge.uploaded { background: #25406a; color: #9ec1ff; }
.badge.in_review { background: #5a4620; color: #ffd48a; }
.badge.graded { background: #1f4a34; color: #8dffc0; }

.viewer { margin: 12px 0 16px; }
.hero-wrap {
  background: #0a0c10;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}
.hero {
  display: block;
  width: 100%;
  max-height: min(62vh, 640px);
  object-fit: contain;
  background: #0a0c10;
  margin: 0 auto;
}
.hero-cap {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--card);
}
.hint {
  margin: 0;
  padding: 0 14px 10px;
  font-size: 12px;
  color: var(--muted);
  background: var(--card);
}
.filmstrip {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 12px 2px 4px;
}
.filmstrip .thumb {
  flex: 0 0 auto;
  width: 112px;
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  padding: 0;
}
.filmstrip .thumb.active {
  border-color: var(--accent);
}
.filmstrip .thumb img {
  width: 100%;
  height: 72px;
  object-fit: cover;
  display: block;
  background: #0a0c10;
}
.filmstrip .thumb .cap {
  padding: 6px 8px;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.25;
}

.grades { display: flex; gap: 10px; margin: 12px 0; }
.grade {
  flex: 1;
  font-size: 22px;
  font-weight: 700;
  padding: 16px 0;
}
.grade.selected {
  outline: 2px solid var(--ok);
  background: #1f4a34;
}
.kbd {
  display: inline-block;
  margin-left: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
  vertical-align: middle;
}
.meta { color: var(--muted); font-size: 13px; text-align: right; }
.user-box { color: var(--muted); font-size: 13px; }

@media (max-width: 700px) {
  .hero { max-height: 42vh; }
  .filmstrip .thumb { width: 88px; }
}