/* ==========================================================================
   Data Day 2027 site styles
   Light surfaces, mobile-first. Design tokens synced from ../Design/palette.css
   (kept inline here so GitHub Pages serves everything from /docs).
   Palette: "Data Day Classic". Core hexes match Design/logo/.

   Structure: Fog page, white cards, Ink body text. The header band (signature
   strip, nav, hero) and the footer stay Dark Blue with the White logo lockup.
   ========================================================================== */

:root {
  /* Dark Blue (primary / bands) */
  --dd-navy-100: #E6EBEE;
  --dd-navy-200: #BFCAD2;
  --dd-navy-300: #889EAB;
  --dd-navy-400: #4A6B80;
  --dd-navy-500: #073451;
  --dd-navy-600: #05263C;
  /* Blue (interactive) */
  --dd-blue-100: #E6F1F8;
  --dd-blue-300: #89BEDF;
  --dd-blue-500: #0977BC;
  --dd-blue-600: #07588B;
  --dd-blue-700: #053F64;
  /* Teal (accent / CTA) */
  --dd-teal-100: #E6F6F5;
  --dd-teal-300: #85D5D0;
  --dd-teal-500: #00A79D;
  --dd-teal-600: #007C74;
  --dd-teal-700: #005953;
  /* Green (accent) */
  --dd-green-200: #DDECD8;
  --dd-green-500: #7CB46A;
  --dd-green-700: #425F38;
  /* Neutrals / surfaces */
  --dd-white: #FFFFFF;
  --dd-fog: #F2F4F6;         /* page background */
  --dd-mist: #DDE2E7;        /* hairlines, dividers */
  --dd-slate: #5F6B75;       /* captions, metadata */
  --dd-ink: #171C21;         /* body text */
  --dd-band: #073451;        /* header band + footer */
  --dd-border-band: #0E4467; /* hairline on the navy band */

  /* semantic aliases */
  --bg: var(--dd-fog);
  --surface: var(--dd-white);
  --fg: var(--dd-ink);
  --body: #3D474F;              /* secondary body copy, 9.5:1 on white */
  --fg-muted: var(--dd-slate);
  --border: var(--dd-mist);
  --accent: var(--dd-teal-500); /* fill only on light: 2.99:1 as text */
  --link: var(--dd-blue-600);   /* Blue 500 misses AA on Fog */

  --maxw: 68rem;
  --pad: clamp(1.25rem, 5vw, 3.5rem);
  --radius: 12px;
  --font: 'Figtree', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 0.5em; }

a { color: var(--link); }

img, svg { max-width: 100%; }

/* Skip link for keyboard users */
.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--dd-teal-500); color: var(--dd-ink);
  padding: 0.5rem 1rem; border-radius: 0 0 8px 0; font-weight: 700; z-index: 10;
}
.skip-link:focus { left: 0; }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-weight: 700; text-decoration: none; border-radius: 999px;
  padding: 0.8rem 1.5rem; transition: transform .12s ease, filter .12s ease;
  border: 1.5px solid transparent;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.05); }
/* Teal fill with Ink text reads on both the navy band and the light page */
.btn-primary { background: var(--dd-teal-500); color: var(--dd-ink); } /* 5.7:1 */
.btn-ghost { background: transparent; color: var(--dd-navy-500); border-color: var(--dd-navy-300); }
.hero .btn-ghost { color: var(--dd-white); border-color: var(--dd-navy-400); }

/* ---- MORPC signature strip (above nav) ---- */
.sig-strip { background: var(--dd-band); border-bottom: 1px solid var(--dd-border-band); }
.sig-strip .wrap { display: flex; justify-content: center; padding-block: 0.4rem; }
.sig-strip a, .sig-strip span {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--dd-navy-300); text-decoration: none;
}
.sig-strip a:hover { color: var(--dd-blue-300); }

/* ---- Site announcement banner (above nav, below sig strip) ---- */
.announce-banner {
  position: relative;
  background: linear-gradient(135deg, var(--dd-teal-500), var(--dd-teal-700));
  border-bottom: 1px solid var(--dd-teal-700);
  min-height: 3.25rem;
}
.announce-banner__inner {
  display: flex; align-items: center; justify-content: center; gap: 1.5rem 2.5rem;
  flex-wrap: wrap; padding: 1.5rem clamp(3rem, 8vw, 4rem); text-align: left;
}
.announce-banner.is-minimized .announce-banner__inner { display: none; }
.announce-banner__item { display: flex; align-items: center; gap: 1rem; min-width: 0; flex: 1 1 320px; max-width: 34rem; }
.announce-banner__divider { width: 1px; align-self: stretch; background: rgba(255,255,255,0.25); }
@media (max-width: 640px) { .announce-banner__divider { display: none; } }
.announce-banner__icon {
  flex-shrink: 0; width: 3rem; height: 3rem; border-radius: 50%;
  background: rgba(255,255,255,0.15); display: flex; align-items: center; justify-content: center;
}
.announce-banner__icon svg { width: 1.75rem; height: 1.75rem; color: var(--dd-white); }
.announce-banner__body { min-width: 0; }
.announce-banner__headline {
  margin: 0; color: var(--dd-white); font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 800; letter-spacing: -0.01em;
}
.announce-banner__detail { margin: 0.2rem 0 0; color: var(--dd-teal-100); font-size: 0.95rem; font-weight: 600; }
.announce-banner__detail a { color: var(--dd-white); text-decoration: underline; text-underline-offset: 2px; }
.announce-banner__detail a:hover { color: var(--dd-teal-100); }
.announce-banner__toggle {
  position: absolute; top: 0.75rem; right: 0.9rem;
  display: inline-flex; align-items: center; gap: 0.35rem;
  background: transparent; border: 0; padding: 0.3rem 0.5rem; border-radius: 6px; cursor: pointer;
  color: var(--dd-white); font-family: inherit;
  font-weight: 700; font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase;
}
.announce-banner__toggle:hover { background: rgba(255,255,255,0.15); }
.announce-banner__toggle::after {
  content: ""; width: 0.45em; height: 0.45em; margin-top: -0.2em;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(45deg); transition: transform .12s ease;
}
.announce-banner__toggle[aria-expanded="true"]::after { transform: rotate(-135deg); margin-top: 0.1em; }

/* ---- Top nav (on the Dark Blue band) ---- */
.topbar { background: var(--dd-band); border-bottom: 1px solid var(--dd-border-band); }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.35rem 1.25rem; padding-block: 0.85rem; }
.topbar__brand { display: flex; align-items: center; gap: 0.6rem; color: var(--dd-white); text-decoration: none; font-weight: 700; white-space: nowrap; }
.topbar__logo { width: clamp(104px, 18vw, 132px); height: auto; display: block; }
.topbar__nav { display: flex; align-items: center; flex-wrap: wrap; gap: 0.35rem clamp(1rem, 3vw, 1.75rem); }

/* Top-level items: plain links and dropdown trigger buttons share one look */
.navitem--menu { position: relative; display: inline-flex; }
.navitem__home { display: inline-flex; align-items: center; }
.navitem__link,
.navitem__btn {
  color: var(--dd-white); text-decoration: none; font-weight: 600;
  font-family: inherit; font-size: inherit; line-height: 1.6;
}
.navitem__btn {
  display: inline-flex; align-items: center; gap: 0.35rem;
  background: none; border: 0; padding: 0; cursor: pointer;
}
.navitem__btn::after {
  content: ""; width: 0.45em; height: 0.45em; margin-top: -0.2em;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(45deg); transition: transform .12s ease;
}
.navitem__btn[aria-expanded="true"]::after { transform: rotate(-135deg); margin-top: 0.1em; }
.navitem__link:hover,
.navitem__btn:hover,
.navitem__btn.is-active,
.navitem__link[aria-current="page"] { color: var(--dd-blue-300); }

/* Dropdown panel: a light card hanging off the dark band */
.navmenu {
  position: absolute; top: calc(100% + 0.55rem); left: 0; z-index: 30;
  display: none; flex-direction: column; min-width: 12rem;
  background: var(--dd-white); border: 1px solid var(--dd-mist);
  border-radius: 10px; padding: 0.4rem;
  box-shadow: 0 14px 34px rgba(7, 52, 81, 0.18);
}
.navmenu[data-open="true"] { display: flex; }
.navmenu__item {
  display: flex; align-items: baseline; justify-content: space-between; gap: 0.9rem;
  color: var(--dd-ink); text-decoration: none; font-weight: 600; font-size: 0.98rem;
  padding: 0.5rem 0.7rem; border-radius: 7px; white-space: nowrap;
}
a.navmenu__item:hover,
a.navmenu__item:focus-visible { background: var(--dd-fog); color: var(--dd-navy-500); }
.navmenu__item[aria-current="page"] { color: var(--dd-blue-600); }
.navmenu__item--disabled { color: var(--dd-slate); cursor: default; }
.navmenu__item em {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-style: normal; font-size: 0.66rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--dd-slate);
}

/* When the top bar wraps on narrow screens, keep the right-most menu on-screen */
@media (max-width: 34rem) {
  .navitem--menu:last-of-type .navmenu { left: auto; right: 0; }
}

/* ---- Hero (stays on the Dark Blue band) ---- */
.hero {
  background: var(--dd-band);
  color: var(--dd-white);
  border-bottom: 1px solid var(--dd-border-band);
  padding-block: clamp(3.5rem, 10vw, 7rem);
}
.hero .eyebrow {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--dd-blue-300); margin: 0 0 1.25rem;
}
.hero__mark { width: clamp(64px, 12vw, 104px); height: auto; margin-bottom: 1.5rem; }
/* Mark + title share one row (horizontal lockup) */
.hero__lockup { display: flex; align-items: center; gap: clamp(1rem, 3vw, 2rem); }
.hero__lockup .hero__mark { margin-bottom: 0; flex: none; }
.hero__lockup h1 { flex: 1 1 auto; min-width: 0; }
.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem); font-weight: 800; margin: 0;
  color: var(--dd-teal-300); /* 7.7:1 on the band; Teal 500 would be 4.3:1 */
}
.hero h1 .sub { display: block; color: var(--dd-white); font-size: 0.42em; font-weight: 700; letter-spacing: 0.02em; margin-top: 0.6rem; }
.hero .lede { font-size: clamp(1.05rem, 2.5vw, 1.35rem); color: var(--dd-navy-200); max-width: 42ch; margin: 1.5rem 0 0; }
.hero .facts { display: flex; flex-wrap: wrap; gap: 0.6rem 1.5rem; margin: 1.75rem 0 0; padding: 0; list-style: none; }
.hero .facts li { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; }
.hero .facts .num { color: var(--dd-teal-300); }
.hero .facts svg { width: 20px; height: 20px; color: var(--dd-blue-300); flex: none; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2.25rem; }

/* ---- Sections ---- */
section { padding-block: clamp(3rem, 8vw, 5rem); }
section h2 { font-size: clamp(1.6rem, 4vw, 2.25rem); color: var(--dd-navy-500); }
section h2 .tick { color: var(--dd-teal-600); }
.muted { color: var(--fg-muted); }
.grid { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 40rem) { .grid.cols-3 { grid-template-columns: repeat(3, 1fr); } }
.grid.auto { grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem 1.5rem 1.75rem;
}
.card svg { width: 28px; height: 28px; color: var(--dd-blue-600); margin-bottom: 0.75rem; }
.card h3 { font-size: 1.15rem; color: var(--dd-navy-500); }
.card p { margin: 0; color: var(--body); font-size: 0.98rem; }
.card .meta { margin-top: 0.9rem; font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 0.78rem; color: var(--fg-muted); }

/* Whole-card links (Get involved) */
.card--link { text-decoration: none; color: inherit; display: block; transition: border-color .12s ease, transform .12s ease, box-shadow .12s ease; }
.card--link:hover { border-color: var(--dd-teal-500); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(7, 52, 81, 0.09); }
.card__more { display: inline-block; margin-top: 1rem; color: var(--link); font-weight: 600; font-size: 0.95rem; }
.card--link:hover .card__more { color: var(--dd-teal-700); }

/* ---- Ways to help: per-way key/value meta ---- */
.way ul { margin: 0 0 0.5rem; padding-left: 1.15rem; color: var(--body); }
.way ul li { margin-bottom: 0.35rem; }
.way ul li::marker { color: var(--dd-teal-600); }
.kv { margin: 1.1rem 0 0; }
.kv > div { display: grid; grid-template-columns: 6.5rem 1fr; gap: 0.15rem 0.9rem; padding: 0.5rem 0; border-top: 1px solid var(--border); }
.kv dt { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--dd-blue-600); padding-top: 0.15rem; }
.kv dd { margin: 0; color: var(--body); font-size: 0.95rem; }

/* ---- FAQ ---- */
.faq { margin: 1rem 0 2.5rem; max-width: 74ch; }
.faq__item + .faq__item { margin-top: 1.6rem; padding-top: 1.6rem; border-top: 1px solid var(--border); }
.faq__q { font-size: 1.1rem; color: var(--dd-navy-500); margin: 0 0 0.5rem; }
.faq__a { margin: 0; color: var(--body); }

/* ---- Sponsor wall (placeholder slots until logos sign on) ---- */
.sponsor-wall { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 1.75rem; }
@media (min-width: 40rem) { .sponsor-wall { grid-template-columns: repeat(4, 1fr); } }
.sponsor-slot {
  display: flex; align-items: center; justify-content: center; text-align: center;
  min-height: 96px; padding: 1rem;
  border: 1px dashed var(--dd-navy-300); border-radius: var(--radius);
  background: var(--surface);
  color: var(--fg-muted); font-size: 0.85rem; font-weight: 600;
}

/* ---- Alternating band (.venue): white, so cards inside drop to Fog ---- */
.venue { background: var(--dd-white); border-block: 1px solid var(--border); }
.venue .card,
.venue .stat,
.venue .quote,
.venue .sponsor-slot { background: var(--dd-fog); }
.venue address { font-style: normal; color: var(--body); margin: 0.5rem 0 1.25rem; }

/* ---- Footer (bookends the header band) ---- */
footer { background: var(--dd-band); color: var(--dd-navy-200); padding-block: 2.5rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 1.5rem 2rem; justify-content: space-between; align-items: center; }
footer p { margin: 0; color: var(--dd-navy-200); font-size: 0.92rem; }
footer a { color: var(--dd-blue-300); }
.footer__logos { display: flex; align-items: center; gap: 1.75rem; flex-wrap: wrap; }
.footer__morpc { display: inline-flex; flex: none; }
.footer__morpc img { width: 100px; height: auto; }
.footer__dd { display: inline-flex; flex: none; }
.footer__dd img { width: 132px; height: auto; }
.footer__text { display: flex; flex-direction: column; gap: 0.4rem; }

/* ---- Stat tiles (What people say) ---- */
.stats { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); margin-top: 2rem; }
.stat {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.6rem 1.25rem; text-align: center;
}
.stat__num { font-size: clamp(2.4rem, 6vw, 3.25rem); font-weight: 800; line-height: 1; color: var(--dd-teal-600); letter-spacing: -0.02em; }
.stat__num small { font-size: 0.42em; font-weight: 700; color: var(--fg-muted); letter-spacing: 0; }
.stat__label { margin-top: 0.7rem; color: var(--body); font-size: 0.95rem; line-height: 1.4; }
.stat__label b { color: var(--fg); font-weight: 700; }

/* ---- Pull quotes ---- */
.quotes { columns: 2; column-gap: 1.25rem; margin-top: 2rem; }
@media (max-width: 46rem) { .quotes { columns: 1; } }
.quote {
  break-inside: avoid; -webkit-column-break-inside: avoid;
  background: var(--surface); border: 1px solid var(--border);
  border-left: 3px solid var(--dd-teal-500); border-radius: var(--radius);
  padding: 1.25rem 1.4rem; margin: 0 0 1.25rem;
}
.quote p { margin: 0 0 0.75rem; color: var(--fg); font-size: 1.02rem; }
.quote cite { color: var(--dd-blue-600); font-style: normal; font-size: 0.74rem; font-family: 'JetBrains Mono', ui-monospace, monospace; letter-spacing: 0.08em; text-transform: uppercase; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
  .card--link { transition: none; }
}