:root {
  color-scheme: dark;
  --builder-bg: #08090c;
  --builder-panel: #111318;
  --builder-panel-soft: #181b22;
  --builder-line: rgba(255, 255, 255, 0.11);
  --builder-text: #f8fafc;
  --builder-muted: #98a2b3;
  --builder-purple: #8b5cf6;
  --builder-purple-light: #c4b5fd;
  --builder-green: #55d98b;
  --builder-red: #fb7185;
  --builder-yellow: #fbbf24;
}

* {
  box-sizing: border-box;
}

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

body.starter-sentence-builder-page {
  overflow-x: hidden;
  color: var(--builder-text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 50% -12%, rgba(124, 58, 237, 0.2), transparent 34%),
    radial-gradient(circle at 105% 70%, rgba(16, 185, 129, 0.08), transparent 28%),
    var(--builder-bg);
}

button,
a {
  font: inherit;
}

.sentence-builder-root {
  min-height: 100svh;
}

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

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

.builder-loading-spinner {
  width: 22px;
  height: 22px;
  border: 3px solid rgba(139, 92, 246, 0.2);
  border-top-color: var(--builder-purple);
  border-radius: 50%;
  animation: builder-spin 0.8s linear infinite;
}

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

.builder-shell {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100svh;
}

.builder-topbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  width: min(1060px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 12px;
}

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

.builder-close:hover,
.builder-close:focus-visible {
  background: rgba(255, 255, 255, 0.07);
  outline: none;
}

.builder-progress-track {
  height: 10px;
  overflow: hidden;
  background: #191b21;
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 999px;
}

.builder-progress-bar {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #7c3aed, #a78bfa);
  border-radius: inherit;
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.58);
  transition: width 0.35s ease;
}

.builder-progress-copy {
  min-width: 86px;
  text-align: right;
}

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

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

.builder-stage {
  display: flex;
  flex-direction: column;
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(24px, 4vw, 48px) 0 34px;
}

.builder-kicker-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.builder-kicker,
.builder-mode {
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.builder-kicker {
  color: var(--builder-purple-light);
}

.builder-mode {
  padding: 7px 10px;
  color: #d0d5dd;
  letter-spacing: 0.03em;
  text-transform: none;
  background: var(--builder-panel-soft);
  border: 1px solid var(--builder-line);
  border-radius: 999px;
}

.builder-prompt-label {
  display: block;
  margin-bottom: 9px;
  color: #667085;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.builder-prompt {
  margin: 0;
  color: #fff;
  font-size: clamp(26px, 4.7vw, 46px);
  line-height: 1.16;
  letter-spacing: -0.035em;
}

.builder-instruction {
  margin: 13px 0 0;
  color: var(--builder-muted);
  font-size: 14px;
  line-height: 1.5;
}

.builder-answer-wrap {
  margin-top: clamp(30px, 6vh, 58px);
}

.builder-answer {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  align-content: flex-start;
  min-height: 106px;
  padding: 17px;
  background:
    linear-gradient(var(--builder-panel), var(--builder-panel)) padding-box,
    linear-gradient(135deg, rgba(139, 92, 246, 0.8), rgba(255, 255, 255, 0.08)) border-box;
  border: 1px solid transparent;
  border-radius: 20px;
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.04);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.builder-answer.is-wrong {
  background:
    linear-gradient(rgba(74, 14, 27, 0.4), rgba(74, 14, 27, 0.4)) padding-box,
    linear-gradient(135deg, var(--builder-red), rgba(255, 255, 255, 0.08)) border-box;
}

.builder-answer.is-correct {
  background:
    linear-gradient(rgba(5, 46, 22, 0.42), rgba(5, 46, 22, 0.42)) padding-box,
    linear-gradient(135deg, var(--builder-green), rgba(255, 255, 255, 0.08)) border-box;
}

.builder-answer-placeholder {
  align-self: center;
  width: 100%;
  color: #667085;
  font-size: 14px;
  text-align: center;
}

.builder-selected-chip,
.builder-word-chip {
  min-height: 46px;
  padding: 10px 15px;
  color: #f8fafc;
  font-weight: 750;
  background: #20232b;
  border: 1px solid #373a44;
  border-radius: 13px;
  cursor: pointer;
  transition: transform 0.14s ease, border-color 0.14s ease, background 0.14s ease;
}

.builder-selected-chip {
  color: #ede9fe;
  background: rgba(124, 58, 237, 0.2);
  border-color: rgba(167, 139, 250, 0.52);
}

.builder-selected-chip:hover:not(:disabled) {
  background: rgba(124, 58, 237, 0.3);
}

.builder-word-chip:hover:not(:disabled),
.builder-word-chip:focus-visible {
  transform: translateY(-2px);
  background: #292c35;
  border-color: var(--builder-purple);
  outline: none;
}

.builder-word-chip:disabled,
.builder-selected-chip:disabled {
  cursor: default;
}

.builder-bank-label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 20px 2px 10px;
  color: #98a2b3;
  font-size: 12px;
  font-weight: 750;
}

.builder-word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 58px;
}

.builder-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 26px;
}

.builder-control,
.builder-check {
  min-height: 48px;
  padding: 11px 16px;
  color: #e4e7ec;
  font-weight: 800;
  background: var(--builder-panel-soft);
  border: 1px solid var(--builder-line);
  border-radius: 14px;
  cursor: pointer;
}

.builder-control:hover:not(:disabled),
.builder-control:focus-visible {
  color: #fff;
  border-color: #667085;
  outline: none;
}

.builder-control.is-hint {
  color: #fde68a;
  border-color: rgba(251, 191, 36, 0.28);
}

.builder-check {
  margin-left: auto;
  padding-inline: 24px;
  color: #fff;
  background: linear-gradient(135deg, #7c3aed, #8b5cf6);
  border-color: #8b5cf6;
  box-shadow: 0 14px 30px rgba(124, 58, 237, 0.25);
}

.builder-control:disabled,
.builder-check:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

.builder-hint,
.builder-feedback {
  margin-top: 14px;
  padding: 15px 17px;
  border-radius: 16px;
}

.builder-hint {
  color: #fef3c7;
  font-size: 14px;
  line-height: 1.55;
  background: rgba(120, 53, 15, 0.25);
  border: 1px solid rgba(251, 191, 36, 0.24);
}

.builder-hint strong {
  color: #fbbf24;
}

.builder-feedback {
  display: flex;
  gap: 13px;
  align-items: center;
  color: #4c0519;
  background: var(--builder-red);
  box-shadow: 0 18px 40px rgba(251, 113, 133, 0.18);
}

.builder-feedback.is-correct {
  color: #052e16;
  background: var(--builder-green);
  box-shadow: 0 18px 40px rgba(85, 217, 139, 0.18);
}

.builder-feedback-icon {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 37px;
  height: 37px;
  font-size: 20px;
  font-weight: 950;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.builder-feedback strong {
  display: block;
  font-size: 17px;
}

.builder-feedback p {
  margin: 3px 0 0;
  color: inherit;
  font-size: 13px;
}

.builder-review-intro,
.builder-result {
  display: grid;
  place-items: center;
  min-height: 100svh;
  padding: 28px 16px;
}

.builder-review-card,
.builder-result-card {
  width: min(720px, 100%);
  padding: clamp(26px, 5vw, 50px);
  text-align: center;
  background:
    radial-gradient(circle at 50% 0, rgba(139, 92, 246, 0.17), transparent 38%),
    var(--builder-panel);
  border: 1px solid var(--builder-line);
  border-radius: 30px;
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.38);
}

.builder-review-icon,
.builder-result-icon {
  display: grid;
  place-items: center;
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
  color: #ede9fe;
  font-size: 27px;
  font-weight: 950;
  background: rgba(124, 58, 237, 0.22);
  border: 1px solid rgba(167, 139, 250, 0.36);
  border-radius: 22px;
}

.builder-review-card h1,
.builder-result-card h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(30px, 5vw, 48px);
  letter-spacing: -0.04em;
}

.builder-review-card > p,
.builder-result-card > p {
  max-width: 570px;
  margin: 14px auto 0;
  color: var(--builder-muted);
  line-height: 1.6;
}

.builder-review-count {
  display: inline-flex;
  margin-top: 24px;
  padding: 10px 14px;
  color: #fecdd3;
  font-size: 13px;
  font-weight: 850;
  background: rgba(244, 63, 94, 0.12);
  border: 1px solid rgba(251, 113, 133, 0.2);
  border-radius: 999px;
}

.builder-primary-button,
.builder-secondary-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 50px;
  padding: 12px 20px;
  color: #fff;
  font-weight: 850;
  text-decoration: none;
  background: linear-gradient(135deg, #7c3aed, #8b5cf6);
  border: 1px solid #8b5cf6;
  border-radius: 15px;
  cursor: pointer;
}

.builder-review-card .builder-primary-button {
  margin-top: 26px;
}

.builder-score-ring {
  display: grid;
  place-items: center;
  width: 190px;
  height: 190px;
  margin: 30px auto;
  background: conic-gradient(var(--builder-purple) var(--score-angle), #24262e 0);
  border-radius: 50%;
  box-shadow: 0 0 52px rgba(139, 92, 246, 0.25);
}

.builder-score-inner {
  display: grid;
  place-items: center;
  width: 154px;
  height: 154px;
  background: #101217;
  border-radius: 50%;
}

.builder-score-inner strong {
  font-size: 43px;
  letter-spacing: -0.05em;
}

.builder-score-inner span {
  color: var(--builder-muted);
  font-size: 12px;
}

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

.builder-result-stat {
  padding: 16px 10px;
  background: #181a20;
  border: 1px solid var(--builder-line);
  border-radius: 16px;
}

.builder-result-stat strong {
  display: block;
  color: #fff;
  font-size: 26px;
}

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

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

.builder-secondary-button {
  color: #e4e7ec;
  background: #1a1c22;
  border-color: var(--builder-line);
}

@media (max-width: 620px) {
  .builder-topbar {
    gap: 10px;
    width: calc(100% - 24px);
    padding-top: 14px;
  }

  .builder-close {
    width: 38px;
    height: 38px;
  }

  .builder-stage {
    width: calc(100% - 28px);
    padding-top: 24px;
  }

  .builder-answer {
    min-height: 120px;
    padding: 14px;
  }

  .builder-selected-chip,
  .builder-word-chip {
    min-height: 44px;
    padding: 9px 13px;
    font-size: 15px;
  }

  .builder-controls {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .builder-control,
  .builder-check {
    min-width: 0;
    padding-inline: 9px;
    font-size: 13px;
  }

  .builder-check {
    grid-column: 1 / -1;
    margin-left: 0;
  }

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

  .builder-result-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }

  .builder-result-stat strong {
    order: 2;
  }

  .builder-primary-button,
  .builder-secondary-button {
    width: 100%;
  }
}

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