/* ============================================================
   AB/BA Conference 2026 — main stylesheet
   ============================================================ */

/* --- Fonts: self-hosted, no Google CDN (GDPR) --------------- */
@font-face {
  font-family: "Inter";
  src: url("../assets/fonts/inter-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6,
                 U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F,
                 U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF;
}
@font-face {
  font-family: "Inter";
  src: url("../assets/fonts/inter-greek.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C,
                 U+038E-03A1, U+03A3-03FF;
}

/* --- Reset -------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 1rem); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--clr-text);
  background: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
}

img, svg, picture { display: block; max-width: 100%; }
img { height: auto; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }

/* --- Utilities ---------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; top: -100%; left: var(--space-2); z-index: 100;
  padding: var(--space-1) var(--space-2);
  background: var(--clr-navy); color: #fff;
  border-radius: var(--radius-sm); text-decoration: none;
}
.skip-link:focus { top: var(--space-2); }

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

.mt-6 { margin-top: var(--space-6); }
.icon { width: 1em; height: 1em; flex: none; }
.plain li { margin: 0; }

/* --- Typography --------------------------------------------- */
h1, h2, h3 {
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: var(--track-display);
  text-wrap: balance;
}
h1 { font-size: var(--fs-display); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p  { text-wrap: pretty; }

.lead { font-size: var(--fs-lead); color: var(--clr-text-muted); }

.eyebrow {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--clr-periwinkle);
}

.rule {
  width: 56px; height: 3px;
  margin: var(--space-1) 0 var(--space-3);
  border: 0; border-radius: 2px;
}
.rule--coral { background: var(--clr-coral); }

/* Three dots + rule — from the Figma submission block */
.dots {
  display: flex; align-items: center; gap: 6px;
  margin: var(--space-2) 0 var(--space-3);
}
.dots::before {
  content: ""; width: 30px; height: 6px;
  background: radial-gradient(circle 3px at 3px 3px, var(--clr-coral) 100%, transparent 0) 0 0/12px 6px repeat-x;
}
.dots::after {
  content: ""; width: 70px; height: 3px;
  background: var(--clr-coral); border-radius: 2px;
}

/* --- Buttons ------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  padding: .7em 1.4em;
  font-size: var(--fs-body); font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background var(--dur) var(--ease),
              color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn--sm { padding: .45em 1em; font-size: var(--fs-small); }

.btn--coral { background: var(--clr-coral); color: #fff; }
.btn--coral:hover { background: var(--clr-coral-hover); }

.btn--outline {
  background: rgba(255,255,255,.75);
  color: var(--clr-navy);
  border-color: var(--clr-navy);
}
.btn--outline:hover { background: var(--clr-navy); color: #fff; }

/* --- Header / nav ------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(46, 64, 128, .72);
  backdrop-filter: blur(12px);
  color: #fff;
}
.nav-inner {
  display: flex; align-items: center; gap: var(--space-3);
  min-height: var(--nav-h);
}
.logo { margin-right: auto; display: flex; }
.logo img { height: 40px; width: auto; }
@media (max-width: 480px) { .logo img { height: 32px; } }

.primary-nav {
  display: flex; align-items: center; gap: var(--space-3);
}
.primary-nav > ul {
  display: flex; gap: var(--space-3);
}
.primary-nav a {
  font-size: var(--fs-small); font-weight: 600;
  letter-spacing: .04em; text-transform: uppercase;
  text-decoration: none;
}
.primary-nav > ul a:hover { color: var(--clr-amber); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  background: none; border: 0; cursor: pointer;
  color: inherit;
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block; width: 22px; height: 2px;
  background: currentColor; border-radius: 2px;
  transition: transform var(--dur) var(--ease);
}
.nav-toggle__bars { margin-inline: auto; }
.nav-toggle__bars::before { content: ""; transform: translateY(-7px); }
.nav-toggle__bars::after  { content: ""; transform: translateY(5px); }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .primary-nav {
    position: absolute; inset: var(--nav-h) 0 auto;
    flex-direction: column; align-items: stretch;
    gap: 0; padding: var(--space-2);
    background: var(--clr-navy);
    display: none;
  }
  .primary-nav[data-open="true"] { display: flex; }
  .primary-nav > ul { flex-direction: column; gap: 0; }
  .primary-nav > ul a { display: block; padding: var(--space-2) var(--space-1); }
  .primary-nav .btn { margin-top: var(--space-2); justify-content: center; }
}

/* --- Sections ----------------------------------------------- */
.section { padding-block: var(--section-pad); }
.section--navy     { background: var(--clr-navy); color: var(--clr-text-invert); }
.section--salmon   { background: var(--clr-bg-salmon); }
.section--mint     { background: var(--clr-bg-mint); }
.section--lavender { background: var(--clr-bg-lavender); }

.section--navy .lead { color: var(--clr-text-on-navy-muted); }
.section > .container > * + * { margin-top: var(--space-3); }

/* --- Hero --------------------------------------------------- */
.hero {
  position: relative;
  display: grid; align-items: center;
  min-height: clamp(480px, 70vh, 720px);
  padding-block: var(--space-6);
  overflow: hidden;
  margin-top: calc(var(--nav-h) * -1);
  padding-top: calc(var(--nav-h) + var(--space-6));
}
.hero__bg { position: absolute; inset: 0; z-index: -1; }
.hero__bg img { width: 100%; height: 100%; object-fit: cover; }

.hero__card {
  max-width: 34rem;
  padding: var(--space-4);
  background: linear-gradient(135deg, rgba(255,255,255,.55), rgba(255,255,255,.28));
  backdrop-filter: blur(6px);
  border-radius: var(--radius-lg);
}
.hero__card h1 { margin-bottom: var(--space-2); }
.hero__subtitle {
  font-size: var(--fs-h3); font-weight: 600;
  color: var(--clr-navy);
}

.hero__meta { display: grid; gap: var(--space-1); margin-bottom: var(--space-4); }
.hero__meta > div { display: flex; align-items: center; gap: .6em; }
.hero__meta dt { color: var(--clr-navy); display: flex; }
.hero__meta dd { margin: 0; font-weight: 500; }

.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* --- About / fact cards ------------------------------------- */
.about__grid {
  display: grid; gap: var(--space-5);
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  align-items: start;
}
@media (max-width: 860px) { .about__grid { grid-template-columns: 1fr; } }

.about__text > * + * { margin-top: var(--space-2); }
.about__text h2 { margin-bottom: var(--space-3); }

.fact-cards {
  display: grid; gap: var(--space-2);
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}
.fact-card {
  padding: var(--space-3) var(--space-2);
  text-align: center;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.22);
  border-radius: var(--radius);
}
.fact-card__icon {
  display: grid; place-items: center;
  width: 56px; height: 56px; margin: 0 auto var(--space-2);
  font-size: 1.6rem;
  background: var(--clr-coral); color: #fff;
  border-radius: var(--radius-pill);
}
.fact-card__value { font-size: var(--fs-small); font-weight: 600; }
.fact-card__label { font-size: var(--fs-small); color: var(--clr-text-on-navy-muted); }

/* --- Topics ------------------------------------------------- */
.topics {
  display: grid; gap: var(--space-1);
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  max-width: 62rem;
}
.topics li { position: relative; padding-left: 1.1em; }
.topics li::before {
  content: "•"; position: absolute; left: 0;
  color: var(--clr-coral); font-weight: 700;
}

/* --- Submission --------------------------------------------- */
.submission__grid {
  display: grid; gap: var(--space-5);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  align-items: start;
}
@media (max-width: 860px) { .submission__grid { grid-template-columns: 1fr; } }

.submission__text > * + * { margin-top: var(--space-2); }
.submission__text h2 { margin-top: var(--space-2); }

.guide-cards {
  display: grid; gap: var(--space-2);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.guide-card {
  padding: var(--space-3);
  background: var(--clr-periwinkle); color: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}
.guide-card h3 { margin-bottom: var(--space-2); }
.guide-card a { color: #fff; }

/* --- Important dates ---------------------------------------- */
.dates { display: grid; gap: var(--space-1); max-width: 52rem; }
.dates li { position: relative; padding-left: 1.2em; font-weight: 500; }
.dates li::before {
  content: ""; position: absolute; left: 0; top: .6em;
  width: 6px; height: 6px;
  background: var(--clr-navy); border-radius: 50%;
}
.dates .is-past { color: var(--clr-text-muted); }
.dates .is-past::before { background: var(--clr-text-muted); }

/* --- Proceedings -------------------------------------------- */
.pub-cards {
  display: grid; gap: var(--space-2);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.pub-card {
  display: flex; flex-direction: column; gap: var(--space-2);
  padding: var(--space-3);
  background: var(--clr-navy); color: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}
.pub-card .btn { margin-top: auto; align-self: start; }

/* --- Workshops ---------------------------------------------- */
.workshop-cards {
  display: grid; gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}
.workshop-card {
  display: grid; gap: var(--space-3);
  grid-template-columns: 120px minmax(0, 1fr);
  padding: var(--space-3);
  background: var(--clr-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
@media (max-width: 520px) { .workshop-card { grid-template-columns: 1fr; } }

.workshop-card > img {
  width: 100%; height: auto;
  border-radius: var(--radius);
}
@media (max-width: 520px) {
  .workshop-card > img { max-width: 160px; }
}

.workshop-card__body > * + * { margin-top: var(--space-2); }
.workshop-card__kicker { color: var(--clr-periwinkle); font-weight: 600; }

.workshop-card__meta {
  display: flex; flex-wrap: wrap; gap: var(--space-3);
  padding-top: var(--space-2);
  border-top: 1px solid var(--clr-border-soft);
  font-size: var(--fs-small);
}
.workshop-card__meta > div { display: flex; gap: .4em; }
.workshop-card__meta dt { color: var(--clr-text-muted); }
.workshop-card__meta dt::after { content: ":"; }
.workshop-card__meta dd { margin: 0; font-weight: 500; }

.callout {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: rgba(123, 133, 216, .18);
  border-radius: var(--radius-lg);
}
.callout p { color: var(--clr-text-muted); }
.callout__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* --- Partners ----------------------------------------------- */
.partner-logos {
  display: grid; gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  align-items: center;
}
.partner-logos img { margin-inline: auto; filter: grayscale(1); opacity: .75; }
.partner-logos img:hover { filter: none; opacity: 1; }

/* --- Footer ------------------------------------------------- */
.site-footer {
  padding-block: var(--space-5) var(--space-3);
  background: var(--clr-navy); color: #fff;
}
.footer__grid {
  display: grid; gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.site-footer h2 {
  font-size: var(--fs-small); text-transform: uppercase;
  letter-spacing: var(--track-eyebrow);
  margin-bottom: var(--space-2);
  color: var(--clr-text-on-navy-muted);
}
.footer__grid img { height: 38px; width: auto; margin-bottom: var(--space-2); }
.site-footer p, .site-footer li { font-size: var(--fs-small); }
.site-footer a { color: #fff; }
.site-footer li + li { margin-top: .35em; }

.footer__legal {
  margin-top: var(--space-4); padding-top: var(--space-2);
  border-top: 1px solid rgba(255,255,255,.18);
  font-size: var(--fs-small);
  color: var(--clr-text-on-navy-muted);
}