:root {
  --background: #ffffff;
  --secondary: #f5f5f5;
  --border: #e5e5e5;
  --muted: #737373;
  --foreground: #171717;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: system-ui, sans-serif;
}

.page {
  min-height: 100vh;
  background: var(--background);
}

/* Hero */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;

  padding: 6rem 1.5rem 5rem;
}

/* Eyebrow */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;

  padding: 0.25rem 0.75rem;
  margin-bottom: 1.75rem;

  border: 1px solid var(--border);
  border-radius: 9999px;

  background: var(--secondary);
  color: var(--muted);

  font-family: monospace;
  font-size: 1rem;
}

.status-dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: #22c55e;
}

/* Headline */

.hero h1 {
  max-width: 36rem;

  margin: 0 0 1.25rem;

  font-size: 4.5rem;
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.hero h1 span {
  color: var(--muted);
}

/* Subtitle */

.subtitle {
  max-width: 24rem;

  margin: 0 0 2.5rem;

  color: var(--muted);

  font-size: 1.125rem;
  line-height: 1.625;
}

/* Button */

.start-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 1.1rem 5rem;
  margin-bottom: 6rem;

  border-radius: 0.375rem;

  background: #171717;
  color: white;

  font-size: 2rem;
  font-weight: 600;
  text-decoration: none;
}

/* Question preview */

.question-preview {
  width: 100%;
  max-width: 32rem;

  overflow: hidden;

  border: 1px solid var(--border);
  border-radius: 0.75rem;

  background: var(--secondary);
}

/* Fake window bar */

.window-bar {
  display: flex;
  align-items: center;
  gap: 0.375rem;

  padding: 0.625rem 1rem;

  border-bottom: 1px solid var(--border);

  background: var(--background);
}

.window-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
}

.window-dot.red {
  background: #f87171;
}

.window-dot.yellow {
  background: #facc15;
}

.window-dot.green {
  background: #4ade80;
}

/* Question */

.question-content {
  padding: 1.25rem;
}

.elo-badge {
  display: inline-block;

  padding: 0.125rem 0.5rem;
  margin-bottom: 0.75rem;

  border: 1px solid var(--border);
  border-radius: 0.375rem;

  background: white;

  font-family: monospace;
  font-size: 0.75rem;
}

.question {
  margin: 0 0 1rem;
  padding: 2rem 0;

  font-size: 1rem;
  font-weight: 500;
  line-height: 1.375;
}

/* Options */

.options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.option {
  padding: 0.625rem 0.875rem;

  border: 1px solid var(--border);
  border-radius: 0.5rem;

  background: var(--background);
  color: var(--muted);

  font-size: 0.875rem;
}

.option.correct {
  border-color: #86efac;
  background: #f0fdf4;
  color: #166534;
}

.option-label {
  margin-right: 0.375rem;

  font-family: monospace;
  font-size: 0.625rem;
  opacity: 0.5;
}

/* Mobile */

@media (max-width: 640px) {
  .hero {
    padding-top: 4rem;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .start-button {
    padding: 1rem 4rem;
  }
}