:root {
  /* Sobeys dark theme — brand green on deep neutral */
  --bg: #0b0f0c;
  --panel: #121813;
  --panel-2: #18211a;
  --border: #26332a;
  --text: #e8ede9;
  --muted: #8ca295;
  --accent: #00a651; /* Sobeys green */
  --accent-2: #00843d; /* Sobeys core green (darker) */
  --green: #22c55e;
  --red: #ef4444;
  --amber: #f59e0b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}

.screen {
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.hidden {
  display: none !important;
}

/* --- centered card screens --- */
#login,
#section-intro,
.overlay {
  align-items: center;
  justify-content: center;
}
.card {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 360px;
  max-width: calc(100vw - 32px);
  text-align: center;
}
/* Sobeys green brand bar across card top */
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
}
.card h1 {
  margin: 0 0 8px;
}
.card input {
  width: 100%;
  padding: 10px 12px;
  margin: 8px 0;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  outline: none;
}
.card input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 166, 81, 0.25);
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  background: var(--accent);
  color: white;
  width: 100%;
  margin: 6px 0;
  transition: background 0.14s ease, filter 0.14s ease, transform 0.05s ease;
}
button:hover:not(:disabled) {
  filter: brightness(1.1);
}
button:active:not(:disabled) {
  transform: translateY(1px);
}
button.secondary {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
}
button.secondary:hover:not(:disabled) {
  border-color: var(--accent);
  filter: none;
}
button.primary {
  background: var(--accent);
}
button.link {
  background: none;
  color: var(--muted);
  width: auto;
  padding: 4px 8px;
  font-weight: 500;
}
button.link:hover:not(:disabled) {
  color: var(--text);
  filter: none;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.actions button {
  width: auto;
}

.muted {
  color: var(--muted);
}
.small {
  font-size: 12px;
}
.msg {
  min-height: 18px;
  font-size: 13px;
  color: var(--amber);
}
.badge {
  display: inline-block;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--muted);
}
.badge.warn {
  background: rgba(245, 158, 11, 0.15);
  color: var(--amber);
}

/* --- topbar --- */
.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 2px solid var(--accent-2);
  background: var(--panel);
}
.spacer {
  flex: 1;
}

/* --- problem list --- */
#problem-list {
  list-style: none;
  margin: 0;
  padding: 12px 16px;
  overflow-y: auto;
  flex: 1;
}
#problem-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  margin-bottom: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
}
#problem-list li:hover {
  border-color: var(--accent);
}
#problem-list .title {
  flex: 1;
  font-weight: 500;
}
.pill {
  font-size: 11px;
  padding: 2px 10px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.pill.Easy {
  background: rgba(34, 197, 94, 0.15);
  color: var(--green);
}
.pill.Medium {
  background: rgba(245, 158, 11, 0.15);
  color: var(--amber);
}
.pill.Hard {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red);
}
.solved {
  color: var(--green);
  font-size: 18px;
}

/* --- workspace split --- */
.split {
  display: flex;
  flex: 1;
  overflow: hidden;
}
.pane {
  flex: 1;
  overflow: auto;
  padding: 16px;
}
#prompt-pane {
  border-right: 1px solid var(--border);
  background: var(--panel);
}
#prompt {
  white-space: pre-wrap;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.5;
  color: #cbd5e1;
}
.editor-pane {
  display: flex;
  flex-direction: column;
  padding: 0;
}
#editor {
  flex: 1;
  min-height: 0;
}
.CodeMirror {
  height: 100% !important;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 14px;
}
.actions {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  align-items: center;
}

/* --- results --- */
#results {
  max-height: 40%;
  overflow-y: auto;
  padding: 0 16px 16px;
}
.case {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 8px 0;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 12px;
}
.case.pass {
  border-left: 3px solid var(--green);
}
.case.fail {
  border-left: 3px solid var(--red);
}
.case .hd {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
}
.case .k {
  color: var(--muted);
}
.case pre {
  margin: 2px 0;
  white-space: pre-wrap;
  word-break: break-word;
}
.summary {
  padding: 10px 12px;
  border-radius: 8px;
  margin: 10px 0;
  font-weight: 600;
}
.summary.ok {
  background: rgba(34, 197, 94, 0.15);
  color: var(--green);
}
.summary.bad {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red);
}
.err {
  color: var(--red);
  white-space: pre-wrap;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 12px;
}

/* --- exam-mode notice (problem list) --- */
.exam-notice {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 16px 16px 22px;
  padding: 18px 22px;
  border-radius: 14px;
  background: linear-gradient(
    135deg,
    rgba(245, 158, 11, 0.14),
    rgba(245, 158, 11, 0.04) 55%,
    rgba(0, 166, 81, 0.06)
  );
  border: 1px solid rgba(245, 158, 11, 0.35);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(4px);
}
/* animated accent bar down the left edge */
.exam-notice::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--amber), var(--accent));
}
/* soft glow bleed top-right */
.exam-notice::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 220px;
  height: 220px;
  background: radial-gradient(
    circle,
    rgba(245, 158, 11, 0.18),
    transparent 70%
  );
  pointer-events: none;
}
.exam-notice-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 22px;
  color: #fff;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.15),
    0 0 20px rgba(245, 158, 11, 0.5);
  animation: examPulse 2.4s ease-in-out infinite;
}
@keyframes examPulse {
  0%,
  100% {
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.15),
      0 0 18px rgba(245, 158, 11, 0.45);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(245, 158, 11, 0.08),
      0 0 28px rgba(245, 158, 11, 0.7);
  }
}
.exam-notice > div {
  position: relative;
  z-index: 1;
}
.exam-notice > div > strong {
  display: block;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--amber);
  margin-bottom: 5px;
}
.exam-notice p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--muted);
}
.exam-notice p strong {
  color: var(--text);
  font-weight: 700;
}

/* --- violation panel (live per-type breakdown on coding screen) --- */
.violation-panel {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(239, 68, 68, 0.08);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}
.vp-title {
  color: var(--red);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.vp-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.vp-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
}
.vp-n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 999px;
  background: var(--red);
  color: #fff;
  font-weight: 700;
  font-size: 11px;
}

/* --- violation toast --- */
.toast {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1100;
  max-width: 320px;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--red);
  border-left: 4px solid var(--red);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.18s ease, transform 0.18s ease;
  pointer-events: none;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* --- overlay --- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  z-index: 1000;
}

/* --- Section 1: MCQ --- */
.topbar-title {
  font-size: 15px;
  font-weight: 600;
}

/* full-width time bar under the topbar */
.mcq-timerbar {
  height: 6px;
  width: 100%;
  background: var(--panel-2);
  overflow: hidden;
}
.mcq-timerbar-fill {
  height: 100%;
  width: 100%;
  background: var(--accent);
  transition: width 0.1s linear, background 0.2s ease;
}
.mcq-timerbar-fill.danger {
  background: var(--red);
}

/* card header: topic pill + circular countdown */
.mcq-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

/* circular ring countdown */
.mcq-ring {
  position: relative;
  width: 52px;
  height: 52px;
  flex: none;
}
.mcq-ring svg {
  width: 52px;
  height: 52px;
  transform: rotate(-90deg); /* start arc at 12 o'clock */
}
.mcq-ring .ring-track {
  fill: none;
  stroke: var(--panel-2);
  stroke-width: 4;
}
.mcq-ring .ring-arc {
  fill: none;
  stroke: var(--accent);
  stroke-width: 4;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.1s linear, stroke 0.2s ease;
}
.mcq-ring.danger .ring-arc {
  stroke: var(--red);
}
.mcq-ring-num {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
}
.mcq-ring.danger .mcq-ring-num {
  color: var(--red);
}

.mcq-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}
.mcq-card {
  width: 100%;
  max-width: 640px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 30px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}
.mcq-card .pill {
  background: var(--panel-2);
  color: var(--accent);
  text-transform: uppercase;
}
#mcq-question {
  margin: 14px 0 22px;
  font-size: 20px;
  line-height: 1.4;
}
#mcq-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mcq-option {
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  margin: 0;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 15px;
  transition: border-color 0.12s ease, background 0.12s ease;
}
.mcq-option:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(0, 166, 81, 0.08);
}
.mcq-option.chosen {
  border-color: var(--accent);
  background: rgba(0, 166, 81, 0.18);
}
.mcq-option:disabled {
  opacity: 0.7;
  cursor: default;
}

/* --- instructions screen --- */
.instructions-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}
.instructions-card {
  width: 100%;
  max-width: 620px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 30px 34px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}
.instructions-card h1 {
  margin: 0 0 6px;
}
.instr-list {
  margin: 20px 0 24px;
  padding-left: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.instr-list li {
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
}
.instr-list li strong {
  color: var(--text);
}
.instr-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.instr-actions .primary {
  width: auto;
  padding: 12px 28px;
}

/* --- reviewer report --- */
#review-login {
  align-items: center;
  justify-content: center;
}
.review-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
}
.review-section {
  margin-bottom: 32px;
}
.review-section h2 {
  font-size: 16px;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}
.review-cand {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  background: var(--panel);
}
.rc-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.code-chip {
  font-family: "SF Mono", Menlo, monospace;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 8px;
  background: var(--panel-2);
  border: 1px solid var(--accent-2);
  color: var(--accent);
}
.review-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  margin: 8px 0;
  table-layout: fixed;
}
.review-table th,
.review-table td {
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  overflow-wrap: anywhere;
}
.review-table th {
  color: var(--muted);
  font-weight: 600;
}
.r-ok {
  color: var(--green);
}
.r-bad {
  color: var(--red);
}
.review-code {
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.rc-hd {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--panel-2);
}
.review-code pre {
  margin: 0;
  padding: 12px;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 320px;
  overflow: auto;
}

/* --- reviewer: summary bar --- */
.review-summary {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 12px 16px;
  margin-bottom: 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 13px;
  color: var(--muted);
}
.review-summary strong {
  color: var(--text);
  font-size: 15px;
}
.review-summary .secondary {
  width: auto;
  margin: 0;
  padding: 8px 14px;
  font-size: 13px;
}

/* --- reviewer: grouped list --- */
.review-group {
  margin-bottom: 28px;
}
.review-group h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 10px;
}
.reviewed-group {
  opacity: 0.6;
}
.reviewed-group:hover {
  opacity: 1;
}
.review-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin: 0 0 8px;
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 13px;
  text-align: left;
}
.review-row:hover:not(:disabled) {
  border-color: var(--accent);
  filter: none;
}
.review-row .metric {
  color: var(--muted);
  white-space: nowrap;
}
.review-row .metric strong {
  color: var(--text);
}
.badge.st-done {
  background: rgba(0, 166, 81, 0.16);
  color: var(--accent);
}
.badge.st-progress {
  background: rgba(245, 158, 11, 0.15);
  color: var(--amber);
}

.review-row.active {
  border-color: var(--accent);
  background: rgba(0, 166, 81, 0.1);
}

.review-search {
  width: 180px;
  margin: 0 0 0 12px;
  padding: 6px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px;
  outline: none;
}
.review-search:focus {
  border-color: var(--accent);
}

/* MCQ option number key badge */
.opt-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-right: 10px;
  border-radius: 5px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

/* position picker */
#review-positions {
  align-items: center;
  justify-content: center;
}
.positions-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
  width: 100%;
}
.positions-card {
  width: 100%;
  max-width: 520px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 30px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}
.position-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 14px 0 8px;
}
.position-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 14px 16px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  text-align: left;
}
.position-row:hover:not(:disabled) {
  border-color: var(--accent);
  filter: none;
}
.position-name {
  font-weight: 700;
}
.position-row .metric {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

/* sort select in reviewer topbar */
.review-sort {
  margin: 0 0 0 8px;
  padding: 6px 8px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 12px;
}

/* position row action buttons */
.position-open {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  margin: 0;
  padding: 14px 16px;
  background: transparent;
  border: none;
  color: var(--text);
  text-align: left;
  font-size: 14px;
}
.position-open:hover {
  filter: none;
}
.position-row {
  padding: 0;
  overflow: hidden;
}
.pos-action {
  width: auto;
  margin: 0;
  padding: 0 12px;
  align-self: stretch;
  background: var(--panel);
  border: none;
  border-left: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}
.pos-action:hover:not(:disabled) {
  color: var(--text);
  background: var(--panel-2);
  filter: none;
}

/* verdict chip + segmented control */
.verdict-chip {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 7px;
  border-radius: 999px;
}
.verdict-chip.v-pass { background: rgba(0, 166, 81, 0.18); color: var(--accent); }
.verdict-chip.v-maybe { background: rgba(245, 158, 11, 0.18); color: var(--amber); }
.verdict-chip.v-fail { background: rgba(239, 68, 68, 0.18); color: var(--red); }

.verdict-box {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 18px;
  background: var(--panel);
}
.verdict-seg {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
}
.vseg {
  flex: 1;
  margin: 0;
  padding: 8px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--muted);
  font-weight: 700;
}
.vseg:hover:not(:disabled) { filter: none; border-color: var(--muted); }
.vseg.on.v-pass { background: var(--accent); color: #fff; border-color: var(--accent); }
.vseg.on.v-maybe { background: var(--amber); color: #1a1205; border-color: var(--amber); }
.vseg.on.v-fail { background: var(--red); color: #fff; border-color: var(--red); }
.verdict-notes {
  width: 100%;
  padding: 10px 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px;
  resize: vertical;
  margin-bottom: 8px;
}
.verdict-box .secondary {
  width: auto;
  margin: 0;
  padding: 8px 16px;
}

/* codes view: move dropdown */
.code-move {
  padding: 4px 6px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 12px;
}

/* per-position settings (counts + time) */
.position-config {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  margin: -4px 0 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 12px;
}
.position-config label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
}
.position-config input {
  width: 64px;
  padding: 5px 7px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
}
.position-config .cfg-save {
  width: auto;
  margin: 0;
  padding: 6px 12px;
}

/* coding countdown in workspace topbar */
#coding-timer.danger {
  background: rgba(239, 68, 68, 0.18);
  color: var(--red);
}

/* candidate name in review rows / detail */
.row-name {
  font-weight: 600;
  color: var(--text);
}
.review-row .row-name {
  min-width: 90px;
}
.codes-result-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0 8px;
}
.codes-result-head .secondary {
  width: auto;
  margin: 0;
  padding: 6px 12px;
}

/* assignment editor */
.assign-modal-card {
  width: min(860px, 94vw);
  max-height: 88vh;
}
#assign-modal-body {
  display: flex;
  flex-direction: column;
  max-height: 88vh;
}
.assign-scroll {
  overflow-y: auto;
  padding: 16px 18px;
}
.assign-cols {
  display: flex;
  gap: 16px;
  margin: 12px 0;
}
.assign-col {
  flex: 1;
  min-width: 0;
}
.assign-col-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
}
.assign-col h3 {
  font-size: 13px;
  color: var(--accent);
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.assign-count {
  font-size: 11px;
  color: var(--muted);
  font-weight: 400;
}
.rand-lbl {
  font-size: 11px;
  color: var(--muted);
  font-weight: 400;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}
/* unified drag-to-order list */
.assign-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 340px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  background: var(--panel-2);
}
.assign-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  line-height: 1.35;
}
.assign-row.on {
  background: rgba(0, 166, 81, 0.1);
  border-color: var(--accent-2);
}
.assign-row.dragging {
  opacity: 0.5;
}
.assign-row.drop-target {
  border-color: var(--accent);
  box-shadow: 0 -2px 0 var(--accent) inset;
}
.a-handle {
  cursor: grab;
  color: var(--muted);
  font-size: 14px;
  flex: none;
  user-select: none;
}
.a-handle:active {
  cursor: grabbing;
}
.a-num {
  flex: none;
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}
.a-num.off {
  background: transparent;
  border: 1px dashed var(--border);
}
.a-check {
  flex: none;
  display: inline-flex;
}
.a-label {
  flex: 1;
  min-width: 0;
  color: var(--text);
}
.a-topic {
  display: inline-block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-right: 4px;
}
.assign-targets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}
.assign-target {
  font-size: 12px;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
}

/* question-bank forms + instructions */
.instr-details {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 16px;
  background: var(--panel);
}
.instr-details > summary {
  cursor: pointer;
  padding: 10px 14px;
  font-weight: 600;
  color: var(--accent);
  user-select: none;
}
.instr-body {
  padding: 0 14px 14px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}
.instr-body ol { padding-left: 20px; }
.instr-body code { color: var(--text); background: var(--panel-2); padding: 1px 5px; border-radius: 4px; }
.instr-body pre {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  overflow-x: auto;
  font-family: "SF Mono", Menlo, monospace;
  font-size: 12px;
  color: var(--text);
  white-space: pre;
}
.bank-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 16px;
  background: var(--panel);
}
.bank-form > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent);
  user-select: none;
}
.bank-form input,
.bank-form textarea,
.bank-form select {
  padding: 8px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px;
}
.bank-form textarea {
  font-family: "SF Mono", Menlo, monospace;
  resize: vertical;
}
.bank-form .primary,
.bank-form .secondary {
  width: auto;
  margin: 0;
  padding: 8px 16px;
}
.validate-msg {
  font-size: 13px;
  min-height: 18px;
}
.validate-msg.ok { color: var(--accent); }
.validate-msg.bad { color: var(--red); white-space: pre-wrap; font-family: "SF Mono", Menlo, monospace; font-size: 12px; }
.validate-msg code { color: var(--text); }

/* add-codes modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1400;
}
.modal-card {
  width: min(520px, 92vw);
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}
.modal-body {
  padding: 18px;
  overflow-y: auto;
}
.modal-label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin: 14px 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.modal-label:first-child {
  margin-top: 0;
}
.codes-gen-row {
  display: flex;
  gap: 8px;
}
.codes-gen-row input {
  width: 100px;
  padding: 8px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
}
.codes-gen-row .secondary {
  width: auto;
  margin: 0;
}
#codes-text {
  width: 100%;
  padding: 10px 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: "SF Mono", Menlo, monospace;
  font-size: 13px;
  resize: vertical;
}

/* leaderboard */
.lb-table th,
.lb-table td {
  white-space: nowrap;
}
.lb-rank {
  font-size: 15px;
  font-weight: 700;
  width: 44px;
  text-align: center;
}
.lb-row {
  cursor: pointer;
}
.lb-row:hover td {
  background: rgba(0, 166, 81, 0.08);
}

/* --- reviewer: two-column split (submissions | detail) --- */
.review-split {
  flex: 1;
  display: flex;
  min-height: 0; /* allow children to scroll */
}
.review-list {
  width: 40%;
  max-width: 480px;
  min-width: 320px;
  overflow-y: auto;
  padding: 16px;
  border-right: 1px solid var(--border);
  background: var(--bg);
}
.review-detail {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}
.detail-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-bottom: 2px solid var(--accent-2);
  background: var(--panel);
}
.detail-head .btn-mark {
  width: auto;
  margin: 0;
  padding: 8px 16px;
  font-size: 13px;
}
.detail-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 18px 22px;
}
.detail-scroll h3 {
  font-size: 14px;
  color: var(--accent);
  margin: 22px 0 8px;
}
.detail-scroll h3:first-child {
  margin-top: 0;
}
.detail-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
/* summary sits flush at top of the list column */
.review-list .review-summary {
  gap: 14px;
  font-size: 12px;
}

/* --- terminal screens (done / already-used) --- */
#done,
#done-completed {
  align-items: center;
  justify-content: center;
}
.done-check,
.done-lock {
  font-size: 48px;
  margin-bottom: 8px;
}
.done-check {
  color: var(--green);
}