:root {
  --color-bg: #fafaf8;
  --color-text: #1d1d1f;
  --color-text-muted: #6e6e73;
  --color-accent: #FF6900;
  --color-accent-hover: #e55e00;
  --color-card-bg: #ffffff;
  --color-border: #e5e5e7;
  --color-shadow: rgba(0, 0, 0, 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1d1d1f;
    --color-text: #f5f5f7;
    --color-text-muted: #a1a1a6;
    --color-accent: #FF8533;
    --color-accent-hover: #FFA366;
    --color-card-bg: #2c2c2e;
    --color-border: #3a3a3c;
    --color-shadow: rgba(0, 0, 0, 0.4);
  }
}

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.container-centered {
  min-height: calc(100vh - 8rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  max-width: 1080px;
  margin: 0 auto;
  border-bottom: 1px solid var(--color-border);
}

.wordmark-small {
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--color-accent);
  letter-spacing: -0.01em;
  text-decoration: none;
}

.wordmark-small:hover {
  color: var(--color-accent-hover);
  text-decoration: none;
}

.back-link {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  text-decoration: none;
}

.back-link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.wordmark-large {
  font-size: clamp(2.75rem, 8vw, 4.5rem);
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 0.75rem;
}

.tagline {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--color-text);
  font-weight: 500;
  margin: 0 0 2rem;
}

.lede {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 32rem;
  margin: 0 auto;
}

h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0 0 0.5rem;
  color: var(--color-text);
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
  margin: 2.5rem 0 0.75rem;
  color: var(--color-text);
}

h3 {
  font-size: 1.1875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin: 1.75rem 0 0.5rem;
  color: var(--color-text);
}

p {
  margin: 0 0 1.1rem;
}

ul, ol {
  margin: 0 0 1.1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.4rem;
}

li:last-child {
  margin-bottom: 0;
}

strong {
  font-weight: 600;
  color: var(--color-text);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.dates {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-bottom: 2.5rem;
}

.dates span {
  display: block;
}

.dates strong {
  color: var(--color-text);
  font-weight: 600;
}

.short-version {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  margin: 2rem 0 2.5rem;
  box-shadow: 0 1px 3px var(--color-shadow);
}

.short-version h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--color-accent);
}

.short-version p:last-child {
  margin-bottom: 0;
}

.short-version ul {
  margin-bottom: 1.1rem;
}

.page-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  max-width: 1080px;
  margin: 2rem auto 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.page-footer p {
  margin: 0.25rem 0;
}

.page-footer a {
  color: var(--color-text-muted);
}

.page-footer a:hover {
  color: var(--color-accent);
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .container {
    padding: 1.5rem 1.25rem 3rem;
  }

  .page-header {
    padding: 1rem 1.25rem;
  }

  .short-version {
    padding: 1.25rem 1.25rem;
    border-radius: 10px;
  }

  h2 {
    font-size: 1.375rem;
    margin-top: 2rem;
  }

  h3 {
    font-size: 1.125rem;
  }
}

@media (max-width: 380px) {
  .page-header {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
}