body.instant-quiz-body {
  --instant-ink: var(--text-main, #153047);
  --instant-muted: var(--text-sub, #647991);
  --instant-line: var(--border, rgba(75, 111, 145, 0.18));
  --instant-card: color-mix(in srgb, var(--card-bg, rgba(255, 255, 255, 0.9)) 94%, transparent);
  --instant-card-strong: color-mix(in srgb, var(--card-bg, rgba(255, 255, 255, 0.9)) 88%, var(--bg, #f2f8ff));
  --instant-card-soft: color-mix(in srgb, var(--card-bg, rgba(255, 255, 255, 0.9)) 82%, var(--primary-soft, rgba(37, 99, 235, 0.14)));
  --instant-control: var(--input-bg, color-mix(in srgb, var(--card-bg, #fff) 84%, var(--bg, #f2f8ff)));
  --instant-control-soft: color-mix(in srgb, var(--input-bg, rgba(255, 255, 255, 0.82)) 80%, var(--card-bg, #fff));
  --instant-blue: var(--primary, #2563eb);
  --instant-mint: var(--accent, #14b8a6);
  --instant-good: var(--success, #16a34a);
  --instant-bad: var(--danger, var(--error, #dc2626));
  --instant-warn: var(--warning, #f97316);
  --instant-primary-soft: var(--primary-soft, rgba(37, 99, 235, 0.14));
  --instant-accent-soft: var(--accent-soft, rgba(20, 184, 166, 0.14));
  --instant-danger-soft: var(--danger-soft, rgba(220, 38, 38, 0.12));
  --instant-success-soft: var(--success-soft, rgba(22, 163, 74, 0.12));
  --instant-warning-soft: var(--warning-soft, rgba(249, 115, 22, 0.14));
  margin: 0;
  min-height: 100vh;
  color: var(--instant-ink);
  font-family: var(--font-body, "SUIT", system-ui, sans-serif);
  background:
    radial-gradient(circle at 8% 10%, color-mix(in srgb, var(--instant-mint) 16%, transparent), transparent 30%),
    radial-gradient(circle at 92% 4%, color-mix(in srgb, var(--instant-blue) 17%, transparent), transparent 28%),
    radial-gradient(circle at 88% 86%, color-mix(in srgb, var(--instant-warn) 10%, transparent), transparent 30%),
    linear-gradient(135deg,
      color-mix(in srgb, var(--bg, #f2f8ff) 94%, var(--instant-primary-soft)),
      var(--bg, #f2f8ff) 52%,
      color-mix(in srgb, var(--bg, #f2f8ff) 92%, var(--instant-accent-soft)));
}

.instant-shell {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  padding: 26px 0 64px;
}

.instant-topbar,
.instant-card,
.instant-panel {
  border: 1px solid var(--instant-line);
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--instant-blue) 10%, transparent), transparent 32%),
    var(--instant-card);
  box-shadow: var(--glass-shadow, 0 22px 54px rgba(39, 77, 118, 0.12));
  backdrop-filter: blur(14px);
}

.instant-topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 22px;
  border-radius: 28px;
  margin-bottom: 18px;
}

.instant-eyebrow {
  margin: 0 0 6px;
  color: var(--instant-mint);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.instant-title {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: 0;
}

.instant-copy {
  margin: 8px 0 0;
  color: var(--instant-muted);
  line-height: 1.6;
}

.instant-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.instant-btn,
.instant-btn-ghost,
.instant-btn-danger {
  min-height: 42px;
  padding: 0 15px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.instant-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--instant-blue), var(--instant-mint));
  box-shadow: 0 14px 28px color-mix(in srgb, var(--instant-blue) 18%, transparent);
}

.instant-btn-ghost {
  color: var(--instant-ink);
  background: var(--instant-control-soft);
  border-color: var(--instant-line);
}

.instant-btn-danger {
  color: #fff;
  background: linear-gradient(135deg, var(--instant-bad), var(--instant-warn));
  box-shadow: 0 14px 28px color-mix(in srgb, var(--instant-bad) 18%, transparent);
}

.instant-btn:hover,
.instant-btn-ghost:hover,
.instant-btn-danger:hover {
  transform: translateY(-1px);
}

.instant-btn:disabled,
.instant-btn-ghost:disabled,
.instant-btn-danger:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
  box-shadow: none;
}

.instant-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1.25fr);
  gap: 18px;
}

.instant-card,
.instant-panel {
  border-radius: 26px;
  padding: 20px;
}

.instant-card h2,
.instant-panel h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
}

.instant-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.instant-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
  color: var(--instant-muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.instant-check {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 14px;
  border: 1px solid var(--instant-line);
  border-radius: 16px;
  background: var(--instant-card-soft);
  color: var(--instant-ink);
  font-size: 0.9rem;
  font-weight: 900;
}

.instant-check input {
  width: 18px;
  height: 18px;
  accent-color: var(--instant-mint);
}

.instant-retry-delay-field {
  max-width: 190px;
}

.instant-retry-delay-field .instant-input:disabled {
  opacity: 0.55;
}

.instant-answer-key-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.instant-answer-key-actions .instant-status {
  flex: 1 1 180px;
  min-width: 0;
}

body.instant-quiz-body .instant-input,
body.instant-quiz-body .instant-textarea {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--instant-line);
  border-radius: 16px;
  background: var(--instant-control);
  color: var(--instant-ink);
  font: inherit;
  font-weight: 700;
  outline: none;
}

.instant-input {
  min-height: 46px;
  padding: 0 14px;
}

.instant-textarea {
  min-height: 120px;
  padding: 13px 14px;
  line-height: 1.5;
  resize: vertical;
}

.instant-input:focus,
.instant-textarea:focus {
  border-color: color-mix(in srgb, var(--instant-blue) 52%, var(--instant-line));
  box-shadow: 0 0 0 4px var(--instant-primary-soft);
}

.instant-status {
  min-height: 22px;
  color: var(--instant-muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.instant-status[data-tone="bad"] {
  color: var(--instant-bad);
}

.instant-status[data-tone="good"] {
  color: var(--instant-good);
}

.instant-session-box {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px dashed color-mix(in srgb, var(--instant-blue) 34%, var(--instant-line));
  border-radius: 18px;
  background: var(--instant-card-soft);
}

.instant-link-row {
  display: flex;
  gap: 8px;
}

.instant-link-row input {
  flex: 1;
}

.instant-qr {
  width: 128px;
  min-height: 128px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: #fff;
  color: #0f172a;
  border: 1px solid var(--instant-line);
}

.instant-kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.instant-kpi {
  padding: 12px;
  border-radius: 18px;
  background: var(--instant-card-soft);
  border: 1px solid var(--instant-line);
}

.instant-kpi span {
  display: block;
  color: var(--instant-muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.instant-kpi strong {
  display: block;
  margin-top: 4px;
  font-size: 1.45rem;
}

.instant-question-box {
  padding: 18px;
  border-radius: 22px;
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--instant-primary-soft) 58%, var(--instant-card)),
    color-mix(in srgb, var(--instant-accent-soft) 54%, var(--instant-card)));
  border: 1px solid color-mix(in srgb, var(--instant-blue) 24%, var(--instant-line));
}

.instant-question-box h2 {
  margin-bottom: 6px;
}

.instant-question {
  margin: 0;
  white-space: pre-wrap;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: 0;
}

.instant-answer-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.instant-rank-list {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.instant-rank-title {
  margin: 0;
  color: var(--instant-muted);
  font-size: 0.9rem;
  font-weight: 900;
}

.instant-rank-row {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--instant-line);
  border-radius: 16px;
  background: var(--instant-card-soft);
}

.instant-rank-row.is-top {
  border-color: color-mix(in srgb, var(--instant-warn) 36%, var(--instant-line));
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--instant-warning-soft) 62%, var(--instant-card)),
    color-mix(in srgb, var(--instant-accent-soft) 46%, var(--instant-card)));
}

.instant-rank-row.is-me {
  border-color: color-mix(in srgb, var(--instant-blue) 42%, var(--instant-line));
  box-shadow: 0 10px 26px rgba(37, 99, 235, 0.1);
}

.instant-rank-no {
  display: inline-grid;
  place-items: center;
  min-height: 34px;
  border-radius: 999px;
  background: var(--instant-primary-soft);
  color: var(--instant-blue);
  font-weight: 1000;
}

.instant-rank-score {
  font-weight: 1000;
}

.instant-rank-identity,
.instant-student-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.instant-student-profile {
  min-height: 58px;
  color: var(--instant-ink);
}

.instant-student-profile-text,
.instant-rank-name-wrap {
  min-width: 0;
}

.instant-student-profile-name,
.instant-student-name {
  overflow-wrap: anywhere;
}

.instant-student-profile-name {
  font-size: 1.05rem;
  font-weight: 1000;
}

.instant-section-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.instant-section-title-row h2 {
  margin: 0;
}

.instant-student-rank-panel {
  margin-top: 18px;
}

.live-avatar-bubble {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 10px 22px rgba(21, 48, 71, 0.14);
  overflow: hidden;
  font-size: 1.25rem;
  line-height: 1;
}

.live-avatar-bubble.lg {
  width: 58px;
  height: 58px;
  font-size: 1.6rem;
}

.live-avatar-bubble img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.instant-analysis-panel {
  margin-top: 18px;
}

.instant-analysis-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 12px 0 16px;
}

.instant-analysis-section {
  margin-top: 18px;
}

.instant-round-analysis-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.instant-round-analysis-card {
  padding: 14px;
  border: 1px solid var(--instant-line);
  border-radius: 18px;
  background: var(--instant-card-soft);
}

.instant-answer-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.36fr) minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--instant-line);
  border-radius: 18px;
  background: var(--instant-card-soft);
}

.instant-answer-row.is-correct {
  border-color: color-mix(in srgb, var(--instant-good) 40%, var(--instant-line));
  background: color-mix(in srgb, var(--instant-success-soft) 66%, var(--instant-card));
}

.instant-answer-row.is-wrong {
  border-color: color-mix(in srgb, var(--instant-bad) 32%, var(--instant-line));
  background: color-mix(in srgb, var(--instant-danger-soft) 64%, var(--instant-card));
}

.instant-student-name {
  font-weight: 900;
}

.instant-student-meta {
  color: var(--instant-muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.instant-answer-text {
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.4;
  word-break: break-word;
}

.instant-mark-actions {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.instant-mini-btn {
  min-height: 34px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--instant-line);
  background: var(--instant-control-soft);
  color: var(--instant-ink);
  font-weight: 900;
  cursor: pointer;
}

.instant-mini-btn.good {
  color: var(--instant-good);
}

.instant-mini-btn.bad {
  color: var(--instant-bad);
}

.instant-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--instant-primary-soft);
  color: var(--instant-blue);
  font-size: 0.8rem;
  font-weight: 900;
}

.instant-pill.good {
  background: var(--instant-success-soft);
  color: var(--instant-good);
}

.instant-pill.bad {
  background: var(--instant-danger-soft);
  color: var(--instant-bad);
}

.instant-empty {
  padding: 24px;
  color: var(--instant-muted);
  text-align: center;
  border: 1px dashed var(--instant-line);
  border-radius: 20px;
}

.instant-student-shell {
  width: min(860px, calc(100% - 28px));
}

.instant-student-answer {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.instant-my-result {
  padding: 14px;
  border-radius: 18px;
  background: var(--instant-card-soft);
  border: 1px solid var(--instant-line);
  color: var(--instant-muted);
  font-weight: 800;
}

.instant-my-result.good {
  color: var(--instant-good);
  border-color: color-mix(in srgb, var(--instant-good) 38%, var(--instant-line));
  background: color-mix(in srgb, var(--instant-success-soft) 68%, var(--instant-card));
}

.instant-my-result.bad {
  color: var(--instant-bad);
  border-color: color-mix(in srgb, var(--instant-bad) 32%, var(--instant-line));
  background: color-mix(in srgb, var(--instant-danger-soft) 66%, var(--instant-card));
}

.hidden {
  display: none !important;
}

@media (max-width: 820px) {
  .instant-topbar {
    flex-direction: column;
  }

  .instant-actions {
    justify-content: flex-start;
  }

  .instant-grid,
  .instant-kpis,
  .instant-analysis-grid,
  .instant-round-analysis-grid {
    grid-template-columns: 1fr;
  }

  .instant-answer-row {
    grid-template-columns: 1fr;
  }

  .instant-mark-actions {
    justify-content: flex-start;
  }

  .instant-link-row {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .instant-rank-row {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .instant-rank-score {
    grid-column: 2;
    justify-self: start;
  }

  .instant-rank-identity {
    gap: 9px;
  }
}