/* ==========================================================================
   The Facts About Sunbirds — stylesheet
   Plain CSS, no build step. Mobile-first, responsive, light + dark aware.
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-alt: #f7f5f0;
  --bg-card: #ffffff;
  --text: #1c1f1d;
  --text-muted: #5a615c;
  --border: #e2ddd2;
  --accent: #1e4d3a;          /* deep pine — primary brand */
  --accent-dark: #143528;
  --accent-contrast: #ffffff;
  --gold: #c4841d;            /* sunrise gold — highlights, deadlines */
  --gold-soft: #f3e2c2;
  --sky: #3d7ea6;
  --link: #1b5e8c;
  --link-hover: #12405f;
  --focus: #3d7ea6;
  --max: 68rem;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.07), 0 6px 18px rgba(0,0,0,.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141715;
    --bg-alt: #1c201d;
    --bg-card: #1c201d;
    --text: #e9ece9;
    --text-muted: #a5ada7;
    --border: #2d332f;
    --accent: #5fae8c;
    --accent-dark: #4a9375;
    --accent-contrast: #10130f;
    --gold: #e0a03a;
    --gold-soft: #4a3612;
    --sky: #7fb4d4;
    --link: #8fc6e8;
    --link-hover: #b3daf2;
    --focus: #8fc6e8;
    --shadow: 0 1px 3px rgba(0,0,0,.4), 0 6px 18px rgba(0,0,0,.3);
  }
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--link-hover); }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 3px;
}

h1, h2, h3 { line-height: 1.2; font-weight: 800; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); margin: 0 0 .5em; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.1rem); margin: 2.2em 0 .6em; }
h3 { font-size: 1.25rem; margin: 1.6em 0 .4em; }

p { margin: 0 0 1em; }

/* ---- Skip link ---------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: .6em 1em;
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

/* ---- Layout ------------------------------------------------------------- */
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

section { padding: 2.5rem 0; }
.section-alt { background: var(--bg-alt); }

/* ---- Header / nav ------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .7rem 1.25rem;
  max-width: var(--max);
  margin: 0 auto;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand img { width: 1.75rem; height: 1.75rem; }
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem .5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  display: inline-block;
  padding: .4rem .6rem;
  border-radius: 7px;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: .95rem;
}
.nav-links a:hover { color: var(--text); background: var(--bg-alt); }
.nav-links a[aria-current="page"] { color: var(--accent); }

/* ---- Buttons ------------------------------------------------------------ */
.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: .8rem 1.4rem;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  border: 2px solid var(--accent);
  transition: background .15s ease, transform .05s ease;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--accent-contrast); }
.btn:active { transform: translateY(1px); }
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-outline:hover { background: var(--accent); color: var(--accent-contrast); }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.25rem; }

/* ---- Hero --------------------------------------------------------------- */
.hero { padding: 3.5rem 0 2.5rem; text-align: left; }
.hero .eyebrow {
  display: inline-block;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
  color: var(--gold);
  margin-bottom: .75rem;
}
.hero p.lead { font-size: 1.25rem; color: var(--text-muted); max-width: 42rem; }
.hero .hl { color: var(--accent); }

/* ---- Deadline strip ----------------------------------------------------- */
.strip {
  background: var(--accent);
  color: var(--accent-contrast);
  text-align: center;
  font-weight: 700;
  padding: .7rem 1rem;
  font-size: 1.02rem;
}
.strip a { color: var(--accent-contrast); text-decoration: underline; }
.strip .sep { opacity: .6; padding: 0 .35rem; }

/* ---- Cards -------------------------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.1rem;
  margin-top: 1.5rem;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card .num { font-size: 2rem; font-weight: 800; color: var(--accent); display: block; }
.card p:last-child { margin-bottom: 0; }
a.card { text-decoration: none; color: inherit; display: block; }
a.card:hover { border-color: var(--accent); }

/* ---- Big stat callout --------------------------------------------------- */
.stat-callout {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: .75rem 2.5rem;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
}
.stat-callout .stat { flex: 1 1 10rem; }
.stat-callout .fig {
  display: block;
  font-size: clamp(1.9rem, 7vw, 3rem);
  font-weight: 800;
  color: var(--accent);
  line-height: 1.1;
}
.stat-callout .lbl { display: block; font-size: .95rem; color: var(--text-muted); }

/* ---- Tables ------------------------------------------------------------- */
.table-scroll { overflow-x: auto; margin: 1.5rem 0; }
table {
  border-collapse: collapse;
  width: 100%;
  min-width: 34rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
th, td { text-align: left; padding: .8rem 1rem; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { background: var(--bg-alt); font-size: .95rem; }
tbody tr:last-child td { border-bottom: none; }
th.col-a { color: var(--text-muted); }
th.col-b { color: var(--accent); }
.claim { color: var(--text-muted); }
.counter { font-weight: 600; }

/* ---- FAQ ---------------------------------------------------------------- */
.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .25rem 1.1rem;
  margin-bottom: .9rem;
  background: var(--bg-card);
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 1.08rem;
  padding: .9rem 0;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+ "; color: var(--accent); font-weight: 800; }
.faq details[open] summary::before { content: "– "; }
.faq details[open] summary { border-bottom: 1px solid var(--border); }
.faq details > *:not(summary) { padding-top: .5rem; }

/* ---- Prose helpers ------------------------------------------------------ */
.prose { max-width: 46rem; }
.prose ul, .prose ol { padding-left: 1.3rem; margin: 0 0 1em; }
.prose li { margin-bottom: .4em; }
.arg { scroll-margin-top: 5rem; }
.arg + .arg { margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid var(--border); }

.note {
  border-left: 4px solid var(--accent);
  background: var(--bg-alt);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
}
.note p:last-child { margin-bottom: 0; }

.note-gold {
  border-left: 4px solid var(--gold);
  background: var(--gold-soft);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
}
.note-gold p:last-child { margin-bottom: 0; }

blockquote {
  margin: 1rem 0;
  padding: .85rem 1.1rem;
  border-left: 4px solid var(--gold);
  background: var(--bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--text);
}
blockquote p { margin: 0; }
blockquote cite { display: block; font-style: normal; font-size: .82rem; color: var(--text-muted); margin-top: .4rem; }

.pull {
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 700;
  font-style: normal;
  line-height: 1.35;
  border-left-width: 5px;
  padding: 1.1rem 1.3rem;
}

.source { font-size: .85rem; color: var(--text-muted); }
.source a { color: var(--text-muted); }

/* ---- Numbered steps ----------------------------------------------------- */
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li {
  position: relative;
  padding: 0 0 1.25rem 3rem;
  margin: 0;
}
.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  background: var(--accent);
  color: var(--accent-contrast);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
}

/* ---- Contact blocks ----------------------------------------------------- */
.contact-list { list-style: none; padding: 0; margin: 1rem 0; }
.contact-list li {
  padding: .75rem 0;
  border-bottom: 1px solid var(--border);
}
.contact-list li:last-child { border-bottom: none; }
.contact-list .who { font-weight: 700; }
.contact-list .what { color: var(--text-muted); font-size: .9rem; }

/* ---- Letter template ---------------------------------------------------- */
.letter {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
}
.letter p { margin-bottom: .9em; }
.letter .fill { color: var(--gold); font-weight: 700; }

/* ---- Footer ------------------------------------------------------------- */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  margin-top: 2rem;
  font-size: .95rem;
  color: var(--text-muted);
}
.site-footer .footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
  justify-content: space-between;
}
.site-footer nav ul { list-style: none; margin: .5rem 0 0; padding: 0; }
.site-footer nav a { color: var(--text-muted); text-decoration: none; display: inline-block; padding: .15rem 0; }
.site-footer nav a:hover { color: var(--text); text-decoration: underline; }
.disclaimer {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: .85rem;
}

/* ---- Utilities ---------------------------------------------------------- */
.center { text-align: center; }
.muted { color: var(--text-muted); }
.mt0 { margin-top: 0; }
.big-date { font-size: 1.4rem; font-weight: 800; color: var(--accent); }

@media (max-width: 640px) {
  /* The nav wraps to several rows on a phone; sticky would eat the screen. */
  .site-header { position: static; }
  .nav { flex-direction: column; align-items: flex-start; gap: .5rem; }
  .nav-links { gap: .1rem .35rem; }
  .nav-links a { padding: .3rem .45rem; font-size: .9rem; }
  .hero { padding-top: 2.25rem; }
  .strip { font-size: .95rem; }
  .strip .sep { display: block; height: 0; overflow: hidden; }
}