:root {
  color-scheme: light;
  --cream: #faf6ee;
  --paper: #fffdf8;
  --beige: #f0e4d4;
  --brown: #593b2b;
  --brown-light: #80583e;
  --caramel: #bd8757;
  --ink: #382b23;
  --muted: #78695d;
  --border: #e5d6c4;
  --green: #276746;
  --green-bg: #e8f5eb;
  --red: #9b3737;
  --red-bg: #fbeaea;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(89, 59, 43, .08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 85px;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(ellipse at 90% 5%, #ecd9c2 0, transparent 32rem),
    var(--cream);
  color: var(--ink);
  font-family: Inter, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

a {
  color: var(--brown-light);
  text-decoration: none;
}

a:hover {
  color: var(--caramel);
}

button, input {
  font: inherit;
}

button, a, input {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible, a:focus-visible, input:focus-visible {
  outline: 3px solid var(--caramel);
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 15px max(22px, calc((100% - 1080px) / 2));
  background: rgba(250, 246, 238, .95);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.brand {
  color: var(--brown);
  font-size: 1.5rem;
  font-weight: 850;
  letter-spacing: -.06em;
}

.brand span {
  color: var(--caramel);
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.site-header nav a {
  color: var(--muted);
  font-size: .94rem;
  font-weight: 650;
}

section {
  padding: 76px 24px;
  scroll-margin-top: 80px;
}

.hero {
  padding-top: clamp(80px, 12vw, 140px);
  padding-bottom: clamp(80px, 12vw, 140px);
  background: linear-gradient(135deg, rgba(240, 228, 212, .72), transparent 70%);
}

.hero > *, .about > *, .test-section > * {
  width: 100%;
  max-width: 1080px;
  margin-right: auto;
  margin-left: auto;
}

.eyebrow {
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--brown-light);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .15em;
}

h1, h2, h3 {
  color: var(--brown);
  line-height: 1.2;
  letter-spacing: -.04em;
}

h1 {
  margin-top: 0;
  margin-bottom: 24px;
  font-size: clamp(2.6rem, 7vw, 5rem);
  max-width: 850px;
}

h2 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: clamp(2rem, 4vw, 2.8rem);
}

.hero-text {
  max-width: 650px;
  margin-top: 0;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 1.12rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin: 6px 8px 6px 0;
  padding: 12px 21px;
  border: 1px solid transparent;
  border-radius: 11px;
  font-weight: 750;
  cursor: pointer;
  transition: background .2s, transform .2s, border-color .2s;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--brown);
  color: white;
  border-color: var(--brown);
}

.button-primary:hover {
  background: var(--brown-light);
  color: white;
}

.button-secondary {
  background: rgba(255, 253, 248, .75);
  color: var(--brown);
  border-color: var(--border);
}

.button-secondary:hover {
  background: white;
  color: var(--brown);
}

.about {
  background: rgba(255, 253, 248, .55);
}

.about > p:not(.eyebrow),
.section-intro {
  max-width: 760px;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 1080px;
  margin: 32px auto 0;
}

.feature-card {
  padding: 25px;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--beige);
  color: var(--brown);
  border-radius: 13px;
  font-size: 1.5rem;
}

.feature-card h3 {
  margin-bottom: 8px;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.test-section {
  background: linear-gradient(180deg, #f3e8d9, var(--cream));
}

.section-intro {
  margin-bottom: 28px;
}

.test-card {
  max-width: 820px;
  margin: 28px auto 0;
  padding: clamp(22px, 5vw, 42px);
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.test-card h3 {
  margin-top: 0;
  font-size: 1.55rem;
}

.test-card p {
  color: var(--muted);
}

.test-card label {
  display: block;
  margin: 20px 0 7px;
  color: var(--brown);
  font-weight: 700;
}

.test-card input {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  color: var(--ink);
  background: white;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.test-card input:focus {
  border-color: var(--caramel);
}

.quiz-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: .92rem;
  font-weight: 700;
}

.timer {
  padding: 5px 12px;
  color: var(--brown);
  background: var(--beige);
  border-radius: 99px;
  font-variant-numeric: tabular-nums;
}

.progress-track {
  height: 8px;
  margin: 17px 0 28px;
  overflow: hidden;
  background: var(--beige);
  border-radius: 99px;
}

.progress-fill {
  width: 0;
  height: 100%;
  background: var(--caramel);
  transition: width .25s ease;
}

.question-title {
  margin: 0 0 22px;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
}

.answers {
  display: grid;
  gap: 11px;
}

.answer {
  width: 100%;
  min-height: 52px;
  padding: 13px 16px;
  text-align: left;
  color: var(--ink);
  background: #fffdf8;
  border: 1px solid var(--border);
  border-radius: 11px;
  font-weight: 650;
  cursor: pointer;
}

.answer:hover:not(:disabled) {
  background: #f3e6d5;
  border-color: var(--caramel);
}

.answer:disabled {
  cursor: default;
  opacity: 1;
}

.answer.answer-correct {
  color: var(--green);
  background: var(--green-bg);
  border-color: #7daf91;
}

.answer.answer-incorrect {
  color: var(--red);
  background: var(--red-bg);
  border-color: #d8a1a1;
}

.feedback {
  margin: 18px 0 8px;
  font-weight: 750;
}

.feedback-correct {
  color: var(--green) !important;
}

.feedback-incorrect {
  color: var(--red) !important;
}

.explanation {
  margin: 12px 0 20px;
  padding: 15px 17px;
  color: var(--ink);
  background: #f5f0e8;
  border-left: 4px solid var(--caramel);
  border-radius: 9px;
}

#next-button:disabled {
  opacity: .5;
  cursor: not-allowed;
  transform: none;
}

.result-score {
  margin: 18px 0;
  color: var(--brown);
  font-size: clamp(2.4rem, 7vw, 4rem);
  font-weight: 850;
  line-height: 1.2;
}

.result-time {
  font-weight: 700;
}

.site-footer {
  padding: 28px 20px;
  text-align: center;
  background: #eee0ce;
  border-top: 1px solid var(--border);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
}

.site-footer .footer-note {
  margin-top: 5px;
  font-size: .8rem;
}

@media (max-width: 700px) {
  .site-header {
    position: relative;
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 14px 20px;
  }

  .site-header nav {
    gap: 12px 18px;
  }

  section {
    padding: 52px 19px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .test-card {
    padding: 23px 17px;
  }

  .button {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}



.iq-result {
  margin: 24px 0;
  padding: 28px 20px;
  text-align: center;
  background: linear-gradient(135deg, #f3e7d6, #fffaf2);
  border: 1px solid var(--border);
  border-radius: 18px;
}

.iq-label {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

.iq-result .result-score {
  margin: 8px 0;
  font-size: clamp(3.5rem, 10vw, 5rem);
}

.iq-status {
  display: inline-block;
  margin: 0;
  padding: 4px 12px;
  color: var(--brown-light);
  background: #fffdf8;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 750;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 22px 0;
}

.overview-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 13px;
}

.overview-label {
  color: var(--muted);
  font-size: .85rem;
}

.overview-item strong {
  color: var(--brown);
  font-size: 1.25rem;
}

.iq-warning {
  margin: 22px 0;
  padding: 17px 19px;
  color: #674a2e;
  background: #fff4df;
  border: 1px solid #e7c998;
  border-left: 4px solid #bd8757;
  border-radius: 10px;
}

.iq-warning strong {
  display: block;
  margin-bottom: 5px;
}

.iq-warning p {
  margin: 0;
  color: #674a2e;
  font-size: .9rem;
}

@media (max-width: 480px) {
  .overview-grid {
    grid-template-columns: 1fr;
  }
}