/*
 * BROADSHEET — Classic newspaper feel
 * Serif headlines, thin rules, warm paper background
 * Open system fonts only
 */

:root {
  --bg: #faf8f4;
  --text: #1a1a1a;
  --text-muted: #555;
  --accent: #8b6914;
  --rule: #c4b99a;
  --warning-bg: #fdf0d5;
  --warning-border: #c9a227;
  --code-bg: #f0ece4;
  --link: #1a4d8f;
  --link-hover: #0d2e5c;
  --masthead-rule: #1a1a1a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1a17;
    --text: #d8d2c6;
    --text-muted: #9a9487;
    --accent: #d4a843;
    --rule: #3d3929;
    --warning-bg: #2a2316;
    --warning-border: #d4a843;
    --code-bg: #252219;
    --link: #7aafe0;
    --link-hover: #a8ccee;
    --masthead-rule: #d8d2c6;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Charter, "Bitstream Charter", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 18px;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Masthead */
header {
  padding: 48px 0 24px;
  text-align: center;
  border-bottom: 3px double var(--masthead-rule);
  margin-bottom: 8px;
}

header h1 {
  font-family: Charter, "Bitstream Charter", "Iowan Old Style", Georgia, serif;
  font-size: 3em;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  line-height: 1.1;
}

header h1 span {
  color: var(--accent);
}

header .tagline {
  font-size: 0.95em;
  color: var(--text-muted);
  margin-top: 10px;
  font-style: italic;
  letter-spacing: 0.5px;
}

/* Warning */
.warning {
  background: var(--warning-bg);
  border-left: 4px solid var(--warning-border);
  padding: 14px 18px;
  margin: 24px 0;
  font-size: 0.88em;
  line-height: 1.6;
}

.warning strong {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Nav — floated sidebar, text wraps around it */
nav {
  float: right;
  margin: 12px 0 20px 28px;
  padding: 14px 0 14px 20px;
  border-left: 1px solid var(--rule);
  width: auto;
}

nav ul {
  list-style: none;
}

nav li {
  margin-bottom: 4px;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.82em;
  text-transform: uppercase;
  letter-spacing: 1px;
  white-space: nowrap;
}

nav a:hover {
  color: var(--accent);
}

@media (max-width: 480px) {
  nav {
    float: none;
    margin: 0 0 28px 0;
    padding: 14px 0;
    border-left: none;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
  }
}

/* Sections */
section {
  margin-bottom: 48px;
}

h2 {
  font-family: Charter, "Bitstream Charter", "Iowan Old Style", Georgia, serif;
  font-size: 1.65em;
  font-weight: 700;
  margin-bottom: 18px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
}

h3 {
  font-size: 0.92em;
  font-weight: 700;
  margin: 28px 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

p {
  margin-bottom: 14px;
  text-align: justify;
  hyphens: auto;
}

ul, ol {
  margin: 0 0 16px 24px;
}

li {
  margin-bottom: 8px;
}

a {
  color: var(--link);
  text-decoration: none;
}

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

strong {
  font-weight: 700;
}

/* Code */
code {
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.85em;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--rule);
  padding: 16px 18px;
  overflow-x: auto;
  margin-bottom: 18px;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.85em;
  line-height: 1.55;
}

/* Flow diagram */
.flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 0;
  margin: 28px 0;
}

.flow-step {
  border: 1px solid var(--rule);
  padding: 14px 10px;
  text-align: center;
  min-width: 0;
}

.flow-step .number {
  display: block;
  font-size: 1.6em;
  font-weight: 700;
  color: var(--accent);
  font-family: Charter, "Bitstream Charter", Georgia, serif;
}

.flow-step .label {
  font-size: 0.82em;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.flow-arrow {
  font-size: 1.3em;
  color: var(--rule);
  text-align: center;
  padding: 0 6px;
}

@media (max-width: 540px) {
  .flow {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .flow-arrow {
    transform: rotate(90deg);
  }
}

/* Platform boxes */
.platform {
  border: 1px solid var(--rule);
  padding: 18px 20px;
  margin-bottom: 14px;
}

.platform h3 {
  margin-top: 0;
}

/* Features grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  list-style: none;
  margin: 0 0 18px 0;
}

.features li {
  border: 1px solid var(--rule);
  padding: 14px;
}

.features li strong {
  display: block;
  margin-bottom: 4px;
  text-transform: uppercase;
  font-size: 0.85em;
  letter-spacing: 0.5px;
}

/* Footer */
footer {
  border-top: 3px double var(--masthead-rule);
  padding: 28px 0 44px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85em;
}

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

footer p {
  margin-bottom: 6px;
  text-align: center;
}