/* The colors of the logo: the blue of the shield, the navy of "Org" */
:root {
  --blue: #1e88e5;
  --blue-dark: #1565c0;
  --navy: #0d1b3e;
  --text: #1f2937;
  --muted: #5b6474;
  --border: #e3e7ee;
  --bg: #ffffff;
  --bg-alt: #f5f8fc;
  --code-bg: #0f1a33;
  --code-text: #dbe6ff;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--blue-dark);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}

h1, h2, h3, h4 {
  color: var(--navy);
  line-height: 1.25;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Top bar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}

.brand img {
  height: 44px;
  width: auto;
}

.topbar nav {
  display: flex;
  gap: 24px;
}

.topbar nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
}

.topbar nav a:hover {
  color: var(--blue);
}

.nav-github {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 12px;
}

/* Hero */

.hero {
  padding: 72px 0 0;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 70%);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.lead {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 760px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}

.button.primary {
  background: var(--blue);
  color: #fff;
}

.button.primary:hover {
  background: var(--blue-dark);
}

.button.secondary {
  background: #fff;
  color: var(--navy);
  border: 1px solid var(--border);
}

.button.secondary:hover {
  border-color: var(--blue);
}

.hero-note {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 16px 0 48px;
}

.hero-shot img,
.shot img {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 20px 50px rgba(13, 27, 62, 0.15);
}

/* Sections */

.section {
  padding: 80px 0;
}

.section.alt {
  background: var(--bg-alt);
}

.section h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin: 0 0 12px;
  text-align: center;
}

.section-lead {
  color: var(--muted);
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

/* How it works */

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
}

.steps h3 {
  margin: 12px 0 8px;
}

.steps p {
  margin: 0;
  color: var(--muted);
}

/* Features */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.feature {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

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

/* Tour: text and screenshot side by side, alternating */

.tour-item {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 72px;
}

.tour-item:last-child {
  margin-bottom: 0;
}

/* the screenshot first: it keeps the wide column */
.tour-item.reverse {
  grid-template-columns: 2fr 1fr;
}

.tour-item.reverse .tour-text {
  order: 2;
}

.tour-text h3 {
  font-size: 1.4rem;
  margin: 0 0 12px;
}

.tour-text p {
  color: var(--muted);
  margin: 0;
}

/* Tokens */

.tokens {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.tokens h2 {
  text-align: left;
}

.tokens-text p {
  color: var(--muted);
}

.code {
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.55;
  margin: 0 0 24px;
}

.code code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Quick start */

#quick-start .code {
  max-width: 720px;
  margin: 0 auto 24px;
}

#quick-start > .container > p:not(.section-lead) {
  max-width: 720px;
  margin: 0 auto;
  color: var(--muted);
}

.subhead {
  text-align: center;
  margin: 56px 0 24px;
}

.ways {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.way {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.way h4 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.way p {
  margin: 0;
  color: var(--muted);
}

/* Repositories */

.repos {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.repo {
  display: block;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-decoration: none;
  color: var(--text);
}

.repo:hover {
  border-color: var(--blue);
}

.repo h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--blue-dark);
}

.repo p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

/* Footer */

.footer {
  padding: 40px 0;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.footer p {
  margin: 4px 0;
}

.small {
  font-size: 0.85rem;
}

/* Tablets and phones: one column */

@media (max-width: 900px) {
  .steps,
  .features,
  .tokens,
  .ways {
    grid-template-columns: 1fr;
  }

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

  .tour-item,
  .tour-item.reverse {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .tour-item.reverse .tour-text {
    order: 0;
  }
}

@media (max-width: 640px) {
  /* the line break of the title only reads well on a wide screen */
  .hero h1 br {
    display: none;
  }

  .topbar nav a:not(.nav-github) {
    display: none;
  }

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

  .section {
    padding: 56px 0;
  }
}