/* Base styles */
:root {
  --color-primary: #2563eb; /* blue-600 */
  --color-primary-light: #3b82f6; /* blue-500 */
  --color-secondary: #0ea5e9; /* cyan-500 */
  --color-text: #0f172a; /* slate-900 */
  --color-text-light: #475569; /* slate-600 */
  --color-background: #ffffff;
  --color-card: #ffffff;
  --color-code-bg: #f8fafc;
  --color-border: #e5e7eb;
  --border-radius: 8px;
  --transition: color .15s ease, background-color .15s ease, border-color .15s ease;
  --shadow: none;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code,
pre {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.9em;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: #fff;
  color: var(--color-text);
  padding: 28px 0 20px;
}

header::before { display: none; }

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Hero banner */
.hero-banner {
  text-align: center;
  padding: 30px 0 0px 0;
  width: 100%;
  margin: 0 auto;
}

.hero-banner img {
  display: block;
  margin: 0 auto;
  max-width: 350px;
  height: auto;
}

.logo {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.03em;
}

.accent {
  color: var(--color-primary);
  font-family: "JetBrains Mono", monospace;
  font-weight: 600;
}

header h1 {
  font-size: 1.85rem;
  max-width: 800px;
  font-weight: 600;
  line-height: 1.3;
  margin: 10px 0 0;
  color: var(--color-text-light);
}

.header-subtitle {
  margin-top: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-light);
  font-size: 0.8rem;
  font-weight: 500;
}

.subtitle {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-light);
}

.byline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: inherit;
}

.byline img {
  height: 16px;
  width: auto;
  display: inline-block;
}

/* Intro section */
.intro {
  padding: 56px 0;
}

.intro .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.intro h2 {
  font-size: 1.9rem;
  margin-bottom: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
}

.intro p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--color-text-light);
}

.intro .code-preview {
  margin-top: 60px;
}

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

.badge {
  background-color: transparent;
  color: var(--color-text-light);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  border: 1px solid var(--color-border);
}

.code-preview {
  background: var(--color-code-bg);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
  position: relative;
}

.code-preview::before { display: none; }

.code-preview code {
  display: block;
  padding: 18px 56px 18px 16px; /* room for copy button */
  line-height: 1.5;
  color: #24292e;
  overflow: auto;
}

/* Spec section */
.spec {
  padding: 64px 0;
  background-color: #f9fafc;
}

.spec h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

.version-tag {
  font-size: 0.8rem;
  background: transparent;
  color: var(--color-text-light);
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 12px;
  vertical-align: middle;
  border: 1px solid var(--color-border);
}

.spec-intro {
  font-size: 1.1rem;
  margin-bottom: 3rem;
  color: var(--color-text-light);
  max-width: 800px;
}

.spec-section {
  margin-bottom: 60px;
}

.spec-section h3 {
  font-size: 1.4rem;
  margin-bottom: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
  border-left: 3px solid var(--color-primary);
  padding-left: 10px;
}

.spec-field {
  background: white;
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: 16px;
  border: 1px solid var(--color-border);
}

.spec-field h4 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.required,
.optional {
  font-size: 0.8rem;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 500;
}

.required {
  background-color: #ffefef;
  color: #e94c4c;
}

.optional {
  background-color: #e8eefb;
  color: #5c7cfa;
}

.spec-field p {
  margin-bottom: 1.5rem;
  color: var(--color-text-light);
}

.spec-field ul {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--color-text-light);
}

.spec-field li {
  margin-bottom: 0.5rem;
}

.spec-field pre {
  background: var(--color-code-bg);
  border-radius: 8px;
  padding: 14px 56px 14px 14px; /* room for copy button */
  margin-bottom: 1.25rem;
  overflow: auto;
  border: 1px solid var(--color-border);
  position: relative;
}

.subfields {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 25px;
}

.subfield {
  background: #f9fafc;
  border-radius: 8px;
  padding: 15px;
}

.subfield h5 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.subfield p {
  margin-bottom: 0;
  font-size: 0.9rem;
}

/* Examples section */
.examples {
  padding: 64px 0;
}

.examples h2 {
  font-size: 2.2rem;
  margin-bottom: 2rem;
  color: var(--color-text);
}

.example-code {
  background: var(--color-code-bg);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
  position: relative;
}

.example-code::before { display: none; }

.example-code pre {
  padding: 18px 56px 18px 16px; /* room for copy button */
  overflow: auto;
  line-height: 1.5;
  border-top: 1px solid var(--color-border);
}

/* Copy button */
.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 12px;
  line-height: 1;
  padding: 6px 10px;
  color: var(--color-text-light);
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
}
.copy-btn:hover { color: var(--color-text); border-color: #d1d5db; }
.copy-btn:focus { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* Benefits section */
.benefits {
  padding: 64px 0;
  background: #fff;
}

.benefits h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  text-align: left;
  color: var(--color-text);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.benefit-card {
  background: white;
  border-radius: var(--border-radius);
  padding: 20px;
  text-align: left;
  border: 1px solid var(--color-border);
}

.benefit-card:hover { border-color: #d1d5db; }

.benefit-icon { display: none; }

.benefit-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.benefit-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* Footer */
footer {
  background: #fff;
  padding: 32px 0;
  text-align: center;
  color: var(--color-text-light);
  border-top: 1px solid var(--color-border);
}

/* Links */
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.nav a {
  color: var(--color-text-light);
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 6px;
  letter-spacing: 0.02em;
}
.nav a:hover { color: var(--color-text); text-decoration: none; }

/* Responsive */
@media (max-width: 920px) {
  .intro .container {
    grid-template-columns: 1fr;
  }

  .intro-visual {
    order: -1;
  }

  header h1 {
    font-size: 1.6rem;
  }

  .intro h2,
  .spec h2,
  .examples h2,
  .benefits h2 {
    font-size: 1.6rem;
  }

  /* Reduce top spacing when code block comes first on tablets/phones */
  .intro { padding: 24px 0 44px; }
  .intro-visual { margin-top: 0; }
}

@media (max-width: 600px) {
  header {
    padding: 20px 0 16px;
  }

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

  .spec-field {
    padding: 18px;
  }

  .spec-field h4 {
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
  }

  .required,
  .optional {
    display: inline-block;
    margin-bottom: 0.5rem;
  }
}

/* Simple nav layout fix for wrapping */
@media (max-width: 720px) {
  .header-bar { flex-direction: column; align-items: flex-start; }
  .nav { display: flex; flex-wrap: wrap; gap: 16px; margin-left: 0; padding-left: 0; }
  /* Remove inner left/right padding so text aligns with logo edge */
  .nav a { padding-left: 0; padding-right: 0; }
}

@media (max-width: 600px) {
  /* Tighten the space above the hero code even more on small phones */
  .intro { padding: 16px 0 40px; }
}