:root {
  color-scheme: light;
  --bg-top: #f3eee2;
  --bg-bottom: #dce9e3;
  --surface: rgba(255, 250, 243, 0.78);
  --surface-strong: rgba(255, 253, 249, 0.92);
  --line: rgba(22, 62, 63, 0.12);
  --ink: #16363a;
  --muted: #5f6f74;
  --accent: #0f6a6d;
  --accent-deep: #0a4b50;
  --accent-warm: #d2872c;
  --good-bg: #e4f5e7;
  --good-line: #62a972;
  --good-ink: #1f6a34;
  --bad-bg: #fce7df;
  --bad-line: #d68873;
  --bad-ink: #a13d2a;
  --shadow: 0 20px 60px rgba(17, 42, 46, 0.14);
  --heading-font: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, serif;
  --body-font: "Avenir Next", "Helvetica Neue", Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--body-font);
  background:
    radial-gradient(circle at top left, rgba(210, 135, 44, 0.2), transparent 35%),
    radial-gradient(circle at bottom right, rgba(15, 106, 109, 0.18), transparent 32%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.45;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, black 35%, transparent 95%);
}

.page-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.35), transparent 40%);
}

.hero {
  display: grid;
  gap: 22px;
  padding: 30px;
}

.eyebrow {
  margin: 0 0 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
}

.hero h1,
.section-heading h2 {
  margin: 0;
  font-family: var(--heading-font);
  font-weight: 700;
  line-height: 1.05;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  max-width: 14ch;
}

.hero-copy,
.section-heading p,
.status-line,
.question-meta,
.question-note,
.empty-state p {
  margin: 0;
  color: var(--muted);
}

.hero-copy {
  max-width: 68ch;
  font-size: 1.02rem;
  line-height: 1.7;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-badges span,
.question-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(15, 106, 109, 0.16);
  background: rgba(255, 255, 255, 0.5);
  color: var(--accent-deep);
  font-size: 0.92rem;
  font-weight: 600;
}

.layout {
  display: grid;
  gap: 20px;
  margin-top: 20px;
}

.controls-panel,
.summary-panel,
.quiz-panel {
  padding: 24px;
}

.section-heading {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field-static {
  align-content: start;
}

.field span {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--accent-deep);
}

.field-value {
  margin: 0;
  min-height: 50px;
  padding: 14px 16px;
  border: 1px solid rgba(15, 106, 109, 0.18);
  border-radius: 16px;
  background: var(--surface-strong);
  color: var(--ink);
  line-height: 1.45;
}

.field select,
button {
  appearance: none;
  border: 1px solid rgba(15, 106, 109, 0.18);
  border-radius: 16px;
  font: inherit;
}

.field select {
  width: 100%;
  padding: 14px 16px;
  background: var(--surface-strong);
  color: var(--ink);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

button {
  padding: 13px 18px;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(16, 49, 52, 0.16);
}

button:disabled {
  opacity: 0.52;
  cursor: not-allowed;
}

button.primary {
  color: #fff7f0;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
}

button.secondary,
button.ghost {
  color: var(--accent-deep);
  background: rgba(255, 255, 255, 0.68);
}

button.ghost {
  padding: 10px 14px;
}

.status-line {
  margin-top: 16px;
  min-height: 1.5em;
  font-size: 0.95rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(145px, 1fr));
  gap: 14px;
}

.saved-results {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  margin-top: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.54);
}

.saved-results-label {
  margin: 0 0 6px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.saved-results-text {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.saved-results-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.saved-results-actions button.is-active {
  color: #fff7f0;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
}

.stat-card {
  display: grid;
  gap: 6px;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.52);
}

.stat-card span {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.stat-card strong {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1;
}

.correct-card {
  background: rgba(228, 245, 231, 0.8);
}

.wrong-card {
  background: rgba(252, 231, 223, 0.8);
}

.quiz-list {
  display: grid;
  gap: 16px;
}

.question-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.62);
}

.question-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.question-number {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.question-title {
  margin: 0;
  font-size: 1.14rem;
  line-height: 1.45;
}

.question-meta {
  margin-top: 8px;
  font-size: 0.94rem;
}

.answers {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.answer-option {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border: 1px solid rgba(22, 54, 58, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
  transition: border-color 140ms ease, transform 140ms ease, background-color 140ms ease;
}

.answer-option:hover {
  transform: translateY(-1px);
  border-color: rgba(15, 106, 109, 0.28);
}

.answer-option input {
  margin-top: 3px;
  accent-color: var(--accent);
}

.answer-option.selected {
  border-color: rgba(15, 106, 109, 0.45);
  box-shadow: inset 0 0 0 1px rgba(15, 106, 109, 0.18);
}

.answer-option.correct {
  border-color: var(--good-line);
  background: var(--good-bg);
}

.answer-option.correct .answer-text {
  color: var(--good-ink);
  font-weight: 700;
}

.answer-option.incorrect {
  border-color: var(--bad-line);
  background: var(--bad-bg);
}

.answer-option.incorrect .answer-text {
  color: var(--bad-ink);
  font-weight: 700;
}

.answer-text {
  line-height: 1.45;
}

.question-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.question-result {
  margin-top: 14px;
  font-weight: 800;
}

.question-result.correct {
  color: var(--good-ink);
}

.question-result.incorrect {
  color: var(--bad-ink);
}

.question-result.neutral {
  color: var(--muted);
}

.empty-state {
  display: grid;
  place-items: center;
  gap: 10px;
  min-height: 240px;
  text-align: center;
}

.empty-state h3 {
  margin: 0;
  font-family: var(--heading-font);
  font-size: 1.8rem;
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 18px, 1000px);
    padding-top: 16px;
  }

  .hero,
  .controls-panel,
  .summary-panel,
  .quiz-panel,
  .question-card {
    padding: 18px;
  }

  .question-top {
    flex-direction: column;
  }

  .toolbar {
    flex-direction: column;
  }

  .toolbar button {
    width: 100%;
  }

  .saved-results {
    flex-direction: column;
    align-items: stretch;
  }

  .saved-results-actions {
    flex-direction: column;
  }

  .saved-results-actions button {
    width: 100%;
  }
}