/* brhythm web pages — the app's "Studio" mode, ported (DEVELOPMENT_PLAN.md §2.1, §2.4).
   Palette values are copied from brhythm/DesignSystem/Theme.swift; keep them in sync.
   Self-contained on purpose: no fonts, images, or scripts to fetch, so these pages load
   on any host and survive being opened from a file:// URL. */

:root {
  --bg: #F2F2F0;
  --card: #FAFAF8;
  --border: #E4E4E0;
  --text: #1A1A1A;
  --secondary: #6E6E6A;
  --accent: #FF4A00;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --card: #1C1C1B;
    --border: #2C2C2A;
    --text: #F2F2F0;
    --secondary: #8F8F8A;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  padding: 0 20px 64px;
  background: var(--bg);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 15px;
  line-height: 1.65;
}

main {
  max-width: 640px;
  margin: 0 auto;
}

/* Masthead ------------------------------------------------------------- */

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 32px 0 40px;
}

.wordmark {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.masthead nav a {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--secondary);
}

/* Type ----------------------------------------------------------------- */

h1 {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin: 0 0 8px;
}

/* Uppercase section label with a trailing rule — the Studio signature. */
h2 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text);
  margin: 40px 0 12px;
}

h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

h3 {
  font-size: 15px;
  font-weight: 600;
  margin: 28px 0 6px;
}

p, li { margin: 0 0 14px; }

ul {
  margin: 0 0 14px;
  padding-left: 20px;
}

li { margin-bottom: 6px; }

strong { font-weight: 600; }

.dateline {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--secondary);
  margin-bottom: 32px;
}

.lede {
  font-size: 17px;
  line-height: 1.55;
  margin-bottom: 32px;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  overflow-wrap: anywhere;
}

a:hover { text-decoration-thickness: 2px; }

/* Cards ---------------------------------------------------------------- */

.callout, .card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  margin: 0 0 24px;
}

.callout p:last-child, .card p:last-child, .card ul:last-child { margin-bottom: 0; }

.callout { border-left: 2px solid var(--accent); }

/* Footer --------------------------------------------------------------- */

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--secondary);
}

footer p { margin-bottom: 6px; }

footer a { color: var(--secondary); }