/* Page-specific styles for /developers main portal page.
 * The hero, lang tabs, steps counter, card grid, and footer styles
 * are unique to this landing page and not used on the subpages. */

:root {
  --bart-blue: #c8402a;
  --bart-blue-dark: #a63320;
  --ink: #1e293b;
  --ink-soft: #64748b;
  --line: #e2e8f0;
  --bg-soft: #f8fafc;
  --code-bg: #0f172a;
  --code-fg: #e2e8f0;
  --code-line: #334155;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--ink);
  line-height: 1.6;
  background: #fff;
}

header.hero {
  background: linear-gradient(135deg, var(--bart-blue) 0%, var(--bart-blue-dark) 100%);
  color: #fff;
  padding: 4rem 1.5rem 3rem;
}
.container {
  max-width: 880px;
  margin: 0 auto;
}
header.hero h1 {
  font-size: 2.5rem;
  margin: 0 0 0.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
header.hero p.lede {
  font-size: 1.15rem;
  opacity: 0.92;
  margin: 0 0 1.5rem;
  max-width: 620px;
}

.cta-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition:
    transform 0.1s ease,
    box-shadow 0.1s ease;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.12);
}
.btn-primary {
  background: #fff;
  color: var(--bart-blue);
}
.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

main {
  padding: 2.5rem 1.5rem 4rem;
}
section {
  margin-bottom: 3rem;
}

h2 {
  font-size: 1.5rem;
  margin: 0 0 1rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.5rem;
}
h3 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.5rem;
}
p {
  color: var(--ink-soft);
  margin: 0 0 0.9rem;
}

code.inline {
  background: var(--bg-soft);
  padding: 0.12rem 0.35rem;
  border-radius: 4px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.92em;
  color: var(--ink);
  border: 1px solid var(--line);
}
pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 1rem 1.1rem;
  border-radius: 8px;
  overflow-x: auto;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  border: 1px solid var(--code-line);
}
pre .comment {
  color: #94a3b8;
}
pre .header {
  color: #ffc9bc;
}
pre .string {
  color: #fcd34d;
}

.steps {
  counter-reset: step;
  padding: 0;
  list-style: none;
  margin: 0;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 1.5rem 3rem;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.25rem;
  height: 2.25rem;
  line-height: 2.25rem;
  background: var(--bart-blue);
  color: #fff;
  border-radius: 50%;
  text-align: center;
  font-weight: 700;
}
.steps li h3 {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
th,
td {
  text-align: left;
  padding: 0.55rem 0.65rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  font-weight: 600;
  background: var(--bg-soft);
}
td code.inline {
  font-size: 0.85em;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.1rem;
  text-decoration: none;
  color: var(--ink);
  transition:
    border-color 0.15s,
    transform 0.1s;
  display: block;
}
.card:hover {
  border-color: var(--bart-blue);
  transform: translateY(-2px);
}
.card h3 {
  margin: 0 0 0.35rem;
  color: var(--bart-blue);
}
.card p {
  margin: 0;
  font-size: 0.9rem;
}

.callout {
  background: var(--bg-soft);
  border-left: 3px solid var(--bart-blue);
  padding: 0.8rem 1rem;
  border-radius: 0 6px 6px 0;
  margin: 1rem 0;
}
.callout p {
  margin: 0;
  color: var(--ink);
  font-size: 0.92rem;
}
.callout.warn {
  border-left-color: #f59e0b;
  background: #fffbeb;
}
.event-pending {
  color: #d97706;
}

.lang-tabs {
  display: flex;
  gap: 0.25rem;
  margin: 0.5rem 0 0;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0;
  flex-wrap: wrap;
}
.lang-tab {
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 0.45rem 0.75rem;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-soft);
  border-radius: 4px 4px 0 0;
  margin-bottom: -1px;
}
.lang-tab:hover {
  color: var(--ink);
  background: var(--bg-soft);
}
.lang-tab.active {
  color: var(--bart-blue);
  border-bottom-color: var(--bart-blue);
  font-weight: 600;
}
.lang-pane {
  margin-top: 0;
  border-radius: 0 8px 8px 8px;
}

footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
footer a {
  color: var(--bart-blue);
}

@media (max-width: 640px) {
  header.hero {
    padding: 3rem 1.25rem 2.5rem;
  }
  header.hero h1 {
    font-size: 1.85rem;
  }
  main {
    padding: 2rem 1.25rem 3rem;
  }
  pre {
    font-size: 0.78rem;
  }
}