:root {
  --extra-bg: #080b12;
  --extra-panel: rgba(18, 24, 38, 0.9);
  --extra-panel-strong: #111827;
  --extra-ink: #f8fafc;
  --extra-muted: #9aa7bd;
  --extra-border: rgba(255, 255, 255, 0.12);
  --extra-cyan: #20d4c7;
  --extra-green: #34d399;
  --extra-red: #fb7185;
  --extra-amber: #fbbf24;
}

* {
  box-sizing: border-box;
}

body.starter-extra-practice-page {
  min-height: 100vh;
  margin: 0;
  color: var(--extra-ink);
  font-family: Arial, sans-serif;
  background:
    radial-gradient(circle at 80% 6%, rgba(32, 212, 199, 0.16), transparent 28%),
    radial-gradient(circle at 10% 24%, rgba(124, 92, 255, 0.16), transparent 24%),
    linear-gradient(180deg, #080b12 0%, #0a101b 100%);
}

.extra-root {
  min-height: 100vh;
}

.extra-loading,
.extra-error,
.extra-locked,
.extra-shell {
  width: min(1040px, calc(100% - 28px));
  margin: 0 auto;
}

.extra-loading,
.extra-error,
.extra-locked {
  display: grid;
  place-items: center;
  min-height: 100vh;
}

.extra-state-card {
  width: min(620px, 100%);
  padding: clamp(24px, 5vw, 42px);
  text-align: center;
  background: var(--extra-panel);
  border: 1px solid var(--extra-border);
  border-radius: 28px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.36);
}

.extra-state-card h1 {
  margin: 12px 0;
  font-size: clamp(28px, 5vw, 48px);
  letter-spacing: -0.04em;
}

.extra-state-card p {
  margin: 0;
  color: var(--extra-muted);
  line-height: 1.6;
}

.extra-spinner {
  display: inline-block;
  width: 46px;
  height: 46px;
  border: 5px solid rgba(255, 255, 255, 0.12);
  border-top-color: var(--extra-cyan);
  border-radius: 50%;
  animation: extra-spin 0.8s linear infinite;
}

@keyframes extra-spin {
  to {
    transform: rotate(360deg);
  }
}

.extra-shell {
  padding: clamp(18px, 4vw, 34px) 0 48px;
}

.extra-topbar {
  display: grid;
  grid-template-columns: auto minmax(160px, 1fr) auto;
  gap: 14px;
  align-items: center;
  margin-bottom: 20px;
}

.extra-close,
.extra-small-action,
.extra-primary,
.extra-secondary {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 44px;
  padding: 11px 15px;
  color: var(--extra-ink);
  font-weight: 900;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--extra-border);
  border-radius: 999px;
  cursor: pointer;
}

button.extra-primary,
button.extra-secondary,
button.extra-small-action {
  font: inherit;
}

.extra-primary {
  color: #06111d;
  background: linear-gradient(135deg, var(--extra-cyan), var(--extra-green));
  border-color: transparent;
}

.extra-secondary {
  background: rgba(255, 255, 255, 0.07);
}

.extra-progress-track {
  height: 12px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
}

.extra-progress-bar {
  display: block;
  width: var(--extra-progress, 0%);
  height: 100%;
  background: linear-gradient(90deg, var(--extra-cyan), var(--extra-green));
  border-radius: inherit;
}

.extra-progress-copy {
  text-align: right;
  color: var(--extra-muted);
  font-size: 13px;
  font-weight: 850;
}

.extra-progress-copy strong {
  display: block;
  color: var(--extra-ink);
  font-size: 15px;
}

.extra-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: end;
  margin-bottom: 20px;
  padding: clamp(22px, 5vw, 42px);
  background:
    radial-gradient(circle at 92% 12%, rgba(255, 255, 255, 0.14), transparent 24%),
    linear-gradient(135deg, rgba(32, 212, 199, 0.88), rgba(124, 92, 255, 0.74));
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 30px;
  box-shadow: 0 24px 74px rgba(0, 0, 0, 0.36);
}

.extra-kicker {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 7px 10px;
  color: rgba(6, 17, 29, 0.76);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.55);
  border-radius: 999px;
}

.extra-hero h1 {
  max-width: 740px;
  margin: 0;
  color: #fff;
  font-size: clamp(34px, 6vw, 66px);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.extra-hero p {
  max-width: 720px;
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 17px;
  line-height: 1.58;
}

.extra-score-mini {
  min-width: 118px;
  padding: 16px;
  text-align: center;
  color: #fff;
  background: rgba(6, 17, 29, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 20px;
}

.extra-score-mini strong {
  display: block;
  font-size: 34px;
  line-height: 1;
}

.extra-score-mini span {
  color: rgba(255, 255, 255, 0.76);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.extra-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
}

.extra-panel,
.extra-side-panel {
  background: var(--extra-panel);
  border: 1px solid var(--extra-border);
  border-radius: 26px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.24);
}

.extra-panel {
  padding: clamp(18px, 3vw, 28px);
}

.extra-side-panel {
  position: sticky;
  top: 16px;
  align-self: start;
  padding: 18px;
}

.extra-panel h2,
.extra-side-panel h2 {
  margin: 0 0 10px;
  color: var(--extra-ink);
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: -0.03em;
}

.extra-panel p,
.extra-side-panel p {
  color: var(--extra-muted);
  line-height: 1.58;
}

.vocab-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.vocab-card {
  min-height: 150px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
}

.vocab-card strong {
  display: block;
  color: var(--extra-ink);
  font-size: 22px;
  letter-spacing: -0.02em;
}

.vocab-card em {
  display: block;
  margin-top: 5px;
  color: var(--extra-cyan);
  font-style: normal;
  font-weight: 900;
}

.vocab-card p {
  margin: 10px 0 0;
  font-size: 14px;
}

.vocab-tip {
  display: inline-flex;
  margin-top: 10px;
  padding: 6px 8px;
  color: #dffcf8;
  font-size: 12px;
  font-weight: 850;
  background: rgba(32, 212, 199, 0.1);
  border-radius: 999px;
}

.extra-question-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.extra-question {
  padding: 16px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
}

.extra-question h3 {
  margin: 0 0 12px;
  color: var(--extra-ink);
  font-size: 18px;
  line-height: 1.35;
}

.extra-options {
  display: grid;
  gap: 9px;
}

.extra-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  width: 100%;
  min-height: 48px;
  padding: 10px 12px;
  color: var(--extra-ink);
  font: inherit;
  text-align: left;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 15px;
  cursor: pointer;
}

.extra-option.is-selected {
  border-color: var(--extra-cyan);
  box-shadow: 0 0 0 3px rgba(32, 212, 199, 0.16);
}

.extra-option.is-correct {
  border-color: rgba(52, 211, 153, 0.8);
  background: rgba(52, 211, 153, 0.12);
}

.extra-option.is-wrong {
  border-color: rgba(251, 113, 133, 0.8);
  background: rgba(251, 113, 133, 0.12);
}

.extra-option-letter {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  color: #06111d;
  font-weight: 950;
  background: #fff;
  border-radius: 10px;
}

.extra-explanation {
  margin: 11px 0 0;
  color: #d7dee9;
  font-size: 14px;
  line-height: 1.5;
}

.reading-passage {
  display: grid;
  gap: 13px;
  margin: 16px 0 18px;
  padding: clamp(18px, 3vw, 26px);
  color: #ecfeff;
  background:
    linear-gradient(135deg, rgba(32, 212, 199, 0.12), rgba(124, 92, 255, 0.1)),
    rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(32, 212, 199, 0.22);
  border-radius: 22px;
}

.reading-passage p {
  margin: 0;
  color: #e6edf8;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.72;
}

.extra-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.extra-actions .extra-primary,
.extra-actions .extra-secondary {
  flex: 1 1 190px;
}

.extra-result-card {
  padding: clamp(22px, 5vw, 40px);
  text-align: center;
  background: var(--extra-panel);
  border: 1px solid var(--extra-border);
  border-radius: 30px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.36);
}

.extra-result-card h1 {
  margin: 0 0 12px;
  font-size: clamp(32px, 6vw, 58px);
  letter-spacing: -0.05em;
}

.extra-score-ring {
  display: grid;
  place-items: center;
  width: 190px;
  height: 190px;
  margin: 22px auto;
  background:
    conic-gradient(var(--extra-green) var(--score-angle), rgba(255, 255, 255, 0.1) 0);
  border-radius: 50%;
}

.extra-score-inner {
  display: grid;
  place-items: center;
  width: 136px;
  height: 136px;
  background: #0c1220;
  border-radius: 50%;
}

.extra-score-inner strong {
  font-size: 42px;
}

.extra-score-inner span {
  color: var(--extra-muted);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.extra-result-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.extra-result-stat {
  padding: 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
}

.extra-result-stat strong {
  display: block;
  font-size: 28px;
}

.extra-result-stat span {
  color: var(--extra-muted);
  font-size: 12px;
  font-weight: 850;
}

@media (max-width: 880px) {
  .extra-topbar,
  .extra-hero,
  .extra-grid {
    grid-template-columns: 1fr;
  }

  .extra-progress-copy {
    text-align: left;
  }

  .extra-side-panel {
    position: static;
  }
}

@media (max-width: 620px) {
  .extra-shell {
    width: min(100% - 20px, 1040px);
  }

  .vocab-grid,
  .extra-result-stats {
    grid-template-columns: 1fr;
  }

  .extra-option {
    grid-template-columns: auto minmax(0, 1fr);
  }
}