:root {
  color-scheme: dark;
  --quiz-bg: #09090b;
  --quiz-panel: #111114;
  --quiz-panel-soft: #18181c;
  --quiz-line: rgba(255, 255, 255, 0.1);
  --quiz-text: #fafafa;
  --quiz-muted: #a1a1aa;
  --quiz-purple: #8b5cf6;
  --quiz-purple-soft: #c4b5fd;
  --quiz-green: #4ade80;
  --quiz-red: #fb7185;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body.starter-focus-quiz-page {
  overflow-x: hidden;
  color: var(--quiz-text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 50% -15%, rgba(139, 92, 246, 0.13), transparent 34%),
    var(--quiz-bg);
}

button,
a {
  font: inherit;
}

.focus-quiz-root {
  min-height: 100svh;
}

.focus-loading,
.focus-error {
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(560px, calc(100% - 32px));
  margin: 25vh auto 0;
  padding: 20px;
  background: var(--quiz-panel);
  border: 1px solid var(--quiz-line);
  border-radius: 20px;
}

.focus-loading p,
.focus-error p {
  margin: 5px 0 0;
  color: var(--quiz-muted);
}

.focus-loading-spinner {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(139, 92, 246, 0.18);
  border-top-color: var(--quiz-purple);
  border-radius: 50%;
  animation: focus-spin 0.8s linear infinite;
}

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

.focus-quiz-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-height: 100svh;
}

.focus-topbar {
  position: relative;
  z-index: 10;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 14px;
}

.focus-close {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  color: #fff;
  font-size: 27px;
  font-weight: 300;
  text-decoration: none;
  background: transparent;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
}

.focus-close:hover {
  background: rgba(255, 255, 255, 0.07);
}

.focus-progress-track {
  height: 10px;
  overflow: hidden;
  background: #18181d;
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 999px;
}

.focus-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #7c3aed, #a78bfa);
  border-radius: inherit;
  box-shadow: 0 0 18px rgba(139, 92, 246, 0.55);
  transition: width 0.38s cubic-bezier(.22, .8, .3, 1);
}

.focus-progress-copy {
  min-width: 78px;
  text-align: right;
}

.focus-progress-copy strong {
  display: block;
  font-size: 14px;
}

.focus-progress-copy span {
  color: var(--quiz-muted);
  font-size: 11px;
}

.focus-stage {
  display: flex;
  flex-direction: column;
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(18px, 4vw, 38px) 0 28px;
}

.focus-question-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.focus-unit-label,
.focus-rule-label {
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.focus-unit-label {
  color: var(--quiz-purple-soft);
}

.focus-rule-label {
  padding: 7px 10px;
  color: #d4d4d8;
  background: #18181c;
  border: 1px solid var(--quiz-line);
  border-radius: 999px;
  letter-spacing: 0.04em;
  text-transform: none;
}

.focus-question {
  margin: 0;
  color: #fff;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.focus-question-hint {
  margin: 12px 0 0;
  color: var(--quiz-muted);
  font-size: 14px;
}

.focus-options {
  display: grid;
  gap: 13px;
  margin-top: clamp(42px, 10vh, 100px);
}

.focus-option {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 28px;
  gap: 14px;
  align-items: center;
  width: 100%;
  min-height: 68px;
  padding: 12px 16px;
  color: #f4f4f5;
  text-align: left;
  background: #101013;
  border: 1px solid #34343b;
  border-radius: 17px;
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.focus-option:hover:not(:disabled),
.focus-option:focus-visible {
  transform: translateY(-2px);
  background: #15141a;
  border-color: var(--quiz-purple);
  outline: none;
}

.focus-option:disabled {
  cursor: default;
}

.focus-option-letter {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: #d4d4d8;
  font-size: 13px;
  font-weight: 900;
  background: #1d1d22;
  border-radius: 11px;
}

.focus-option-text {
  font-size: clamp(15px, 2.4vw, 18px);
  font-weight: 750;
}

.focus-option-icon {
  color: transparent;
  font-size: 18px;
  font-weight: 900;
  text-align: center;
}

.focus-option.is-selected {
  border-color: var(--quiz-purple);
  box-shadow: 0 0 0 1px rgba(139, 92, 246, 0.2), 0 0 26px rgba(139, 92, 246, 0.12);
}

.focus-option.is-correct {
  background: rgba(34, 197, 94, 0.1);
  border-color: var(--quiz-green);
}

.focus-option.is-correct .focus-option-letter {
  color: #052e16;
  background: var(--quiz-green);
}

.focus-option.is-correct .focus-option-icon {
  color: var(--quiz-green);
}

.focus-option.is-wrong {
  background: rgba(244, 63, 94, 0.1);
  border-color: var(--quiz-red);
}

.focus-option.is-wrong .focus-option-letter {
  color: #4c0519;
  background: var(--quiz-red);
}

.focus-option.is-wrong .focus-option-icon {
  color: var(--quiz-red);
}

.focus-keyboard-tip {
  margin-top: 14px;
  color: #71717a;
  font-size: 11px;
  text-align: center;
}

.focus-feedback {
  position: fixed;
  z-index: 30;
  inset: auto 0 0;
  transform: translateY(105%);
  padding: 22px max(20px, env(safe-area-inset-right)) calc(22px + env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
  color: #052e16;
  background: #55d38b;
  border-radius: 28px 28px 0 0;
  box-shadow: 0 -22px 60px rgba(0, 0, 0, 0.35);
  transition: transform 0.32s cubic-bezier(.2, .8, .2, 1), background 0.2s ease;
}

.focus-feedback.is-visible {
  transform: translateY(0);
}

.focus-feedback.is-wrong {
  color: #4c0519;
  background: #fb7185;
}

.focus-feedback-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  width: min(860px, 100%);
  margin: 0 auto;
}

.focus-feedback-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  font-size: 23px;
  font-weight: 950;
  border: 2px solid currentColor;
  border-radius: 16px;
}

.focus-feedback-copy strong {
  display: block;
  font-size: clamp(20px, 3vw, 27px);
  line-height: 1.1;
}

.focus-feedback-copy p {
  max-width: 650px;
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.45;
}

.focus-feedback-copy b {
  font-weight: 950;
}

.focus-next {
  min-width: 150px;
  min-height: 52px;
  padding: 12px 20px;
  color: #064e3b;
  font-weight: 900;
  background: #fff;
  border: 0;
  border-radius: 15px;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.focus-feedback.is-wrong .focus-next {
  color: #881337;
}

.focus-result {
  display: grid;
  place-items: center;
  min-height: 100svh;
  padding: 30px 16px;
}

.focus-result-card {
  width: min(820px, 100%);
  padding: clamp(24px, 5vw, 48px);
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.17), transparent 32%),
    #111114;
  border: 1px solid var(--quiz-line);
  border-radius: 28px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.38);
}

.focus-result-kicker {
  color: var(--quiz-purple-soft);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.focus-result-card h1 {
  margin: 12px 0 8px;
  font-size: clamp(32px, 6vw, 54px);
  line-height: 1;
  letter-spacing: -0.045em;
}

.focus-result-card > p {
  max-width: 590px;
  margin: 0 auto;
  color: var(--quiz-muted);
  line-height: 1.55;
}

.focus-score-ring {
  --score-angle: 0deg;
  position: relative;
  display: grid;
  place-items: center;
  width: 190px;
  height: 190px;
  margin: 30px auto;
  background: conic-gradient(var(--quiz-purple) var(--score-angle), #24242a 0);
  border-radius: 50%;
}

.focus-score-ring::before {
  content: "";
  position: absolute;
  inset: 13px;
  background: #111114;
  border-radius: 50%;
}

.focus-score-value {
  position: relative;
  z-index: 1;
}

.focus-score-value strong {
  display: block;
  font-size: 48px;
  line-height: 1;
}

.focus-score-value span {
  display: block;
  margin-top: 7px;
  color: var(--quiz-muted);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.focus-result-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.focus-result-stat {
  padding: 16px;
  background: #18181c;
  border: 1px solid var(--quiz-line);
  border-radius: 16px;
}

.focus-result-stat strong {
  display: block;
  font-size: 25px;
}

.focus-result-stat span {
  color: var(--quiz-muted);
  font-size: 11px;
}

.focus-result-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.focus-result-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 12px 18px;
  color: #fff;
  font-weight: 900;
  text-decoration: none;
  background: linear-gradient(135deg, #7c3aed, #a78bfa);
  border: 0;
  border-radius: 14px;
  cursor: pointer;
}

.focus-result-button.is-secondary {
  color: #e4e4e7;
  background: #18181c;
  border: 1px solid var(--quiz-line);
}

.focus-review {
  margin-top: 26px;
  text-align: left;
}

.focus-review h2 {
  margin: 0 0 12px;
  font-size: 19px;
}

.focus-review-list {
  display: grid;
  gap: 9px;
}

.focus-review-item {
  padding: 14px;
  background: #18181c;
  border: 1px solid var(--quiz-line);
  border-radius: 14px;
}

.focus-review-item strong {
  display: block;
  line-height: 1.35;
}

.focus-review-item p {
  margin: 7px 0 0;
  color: var(--quiz-muted);
  font-size: 13px;
  line-height: 1.45;
}

@media (max-width: 680px) {
  .focus-topbar {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px;
    width: calc(100% - 24px);
    padding-top: calc(12px + env(safe-area-inset-top));
  }

  .focus-progress-copy {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    min-width: 0;
    padding-left: 52px;
    text-align: left;
  }

  .focus-progress-copy strong,
  .focus-progress-copy span {
    display: inline;
  }

  .focus-stage {
    width: calc(100% - 28px);
    padding-top: 18px;
    padding-bottom: 210px;
  }

  .focus-question-meta {
    align-items: flex-start;
  }

  .focus-question {
    font-size: clamp(27px, 8vw, 38px);
  }

  .focus-options {
    margin-top: clamp(48px, 10vh, 90px);
  }

  .focus-option {
    min-height: 64px;
    border-radius: 15px;
  }

  .focus-keyboard-tip {
    display: none;
  }

  .focus-feedback {
    padding: 20px 18px calc(18px + env(safe-area-inset-bottom));
    border-radius: 26px 26px 0 0;
  }

  .focus-feedback-inner {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 12px;
  }

  .focus-next {
    grid-column: 1 / -1;
    width: 100%;
  }

  .focus-result-stats {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}