/* The Oath Project: public site.
   Every text color pairing meets at least 8:1 contrast (checked by scripts/contrast.mjs). */

:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #374151;
  --navy: #0b2250;
  --blue: #0d3b8e;
  --blue-deep: #082a6b;
  --band: #eef2f8;
  --rule: #c5cedd;
  --on-navy: #ffffff;
  --on-navy-soft: #c9d6ee;
  --stage: #10151f;
  --stage-soft: #c9d1de;
  --serif: "Iowan Old Style", "Charter", "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --gutter: clamp(16px, 4vw, 40px);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: #ffffff;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.125rem;
  line-height: 1.6;
}

h1, h2, h3, h4 { font-family: var(--serif); color: var(--navy); line-height: 1.15; margin: 0; font-weight: 700; }
p { margin: 0 0 1em; }
img { max-width: 100%; display: block; }

a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--blue-deep); text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }

.wrap { max-width: 1200px; margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }

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

.skip {
  position: absolute; left: 12px; top: -80px; z-index: 10;
  background: #ffffff; color: var(--blue); padding: 10px 14px; font-weight: 600;
}
.skip:focus { top: 12px; }

/* ---------- masthead ---------- */

.masthead { background: var(--navy); color: var(--on-navy); }
.masthead-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  min-height: 60px; gap: 6px 16px; padding-top: 10px; padding-bottom: 10px;
}
.wordmark {
  font-family: var(--serif); font-weight: 700; font-size: 1.2rem; color: var(--on-navy);
  text-decoration: none; letter-spacing: 0.01em;
}
.masthead-link { color: var(--on-navy); font-size: 1rem; font-weight: 600; }
.masthead a:hover { color: var(--on-navy); }
.masthead :focus-visible { outline-color: var(--on-navy); }

/* ---------- intro ---------- */

.intro { padding-top: clamp(40px, 8vw, 96px); padding-bottom: clamp(32px, 5vw, 64px); display: grid; gap: 28px; }
.intro h1 { font-size: clamp(2.4rem, 1.4rem + 4.2vw, 4.6rem); letter-spacing: -0.015em; max-width: 12ch; }
.intro-text { max-width: 36em; }
.intro-text p:last-child { margin-bottom: 0; }
.lede { font-size: 1.25rem; line-height: 1.55; }

@media (min-width: 960px) {
  .intro { grid-template-columns: 7fr 5fr; align-items: end; column-gap: 56px; }
  .intro-text { border-top: 4px solid var(--navy); padding-top: 20px; }
}

/* ---------- gallery ---------- */

.gallery { padding-bottom: clamp(56px, 8vw, 104px); }
.gallery:focus { outline: none; }
.gallery-head {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: 4px 24px; border-top: 1px solid var(--rule); padding-top: 24px;
}
.gallery-head h2 { font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); }
.count { margin: 0; color: var(--muted); font-size: 1rem; }

.filters { display: flex; flex-wrap: wrap; gap: 4px 26px; margin: 18px 0 28px; }
.filters button {
  font: inherit; font-size: 1rem; color: var(--muted); background: none; border: 0;
  border-bottom: 3px solid transparent; padding: 6px 0 4px; cursor: pointer;
}
.filters button:hover { color: var(--ink); border-bottom-color: var(--rule); }
.filters button[aria-pressed="true"] { color: var(--navy); font-weight: 700; border-bottom-color: var(--navy); }

.notice { color: var(--muted); font-size: 1.05rem; margin: 24px 0; }

.grid {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 36px 24px;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr));
}
@media (max-width: 520px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 14px; }
}

.card {
  display: block; width: 100%; padding: 0; border: 0; background: none; text-align: left;
  font: inherit; color: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent;
}
/* Thumbnails are stored at 800 × 1000 (4:5), the same shape as the card. */
.card-frame { position: relative; aspect-ratio: 4 / 5; background: var(--band); overflow: hidden; }
.card-frame img { width: 100%; height: 100%; object-fit: cover; transition: filter 0.15s ease; }
.card-play {
  position: absolute; left: 0; bottom: 0; width: 44px; height: 44px; background: var(--navy);
  display: grid; place-items: center;
}
.card-play::before {
  content: ""; margin-left: 3px; border-style: solid; border-width: 8px 0 8px 13px;
  border-color: transparent transparent transparent #ffffff;
}
.card-name { display: block; font-family: var(--serif); font-weight: 700; font-size: 1.2rem; line-height: 1.25; color: var(--ink); margin-top: 12px; }
.card-category { display: block; font-size: 0.95rem; color: var(--muted); margin-top: 2px; }
.card:hover .card-frame img { filter: brightness(0.9); }
.card:hover .card-name { text-decoration: underline; text-underline-offset: 0.18em; }
.card:focus-visible { outline-offset: 5px; }

@media (max-width: 520px) {
  .card-name { font-size: 1.05rem; }
  .card-play { width: 36px; height: 36px; }
}

/* ---------- how to take the oath ---------- */

.howto { background: var(--band); padding: clamp(56px, 8vw, 104px) 0; }
.howto-inner { display: grid; gap: 48px; }
@media (min-width: 960px) {
  .howto-inner { grid-template-columns: 5fr 7fr; column-gap: 80px; }
}
.eyebrow {
  font-size: 0.9rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 10px;
}
.howto-lead h2 { font-size: clamp(2.4rem, 1.6rem + 3vw, 3.6rem); margin-bottom: 20px; }
.howto-lead p { max-width: 30em; }

.button {
  display: inline-block; background: var(--navy); color: #ffffff; text-decoration: none;
  font-weight: 600; padding: 14px 24px; margin-top: 8px; border-radius: 2px;
}
.button:hover { background: var(--blue-deep); color: #ffffff; }

.howto-steps h3 { font-size: 1.5rem; margin-bottom: 8px; }
.steps { list-style: none; counter-reset: step; margin: 0 0 36px; padding: 0; }
.steps li {
  counter-increment: step; display: grid; grid-template-columns: 56px 1fr; column-gap: 8px;
  padding: 20px 0; border-bottom: 1px solid var(--rule);
}
.steps li::before {
  content: counter(step); grid-row: span 2; font-family: var(--serif); font-weight: 700;
  font-size: 2.4rem; line-height: 1; color: var(--blue);
}
.steps h4 { font-size: 1.2rem; margin-bottom: 6px; }
.steps p { margin: 0; }

.social-label { font-weight: 700; margin-bottom: 8px; }
.social { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 28px; }
.social a { font-weight: 600; }

/* ---------- footer ---------- */

.site-footer { background: var(--navy); color: var(--on-navy-soft); padding: 32px 0; font-size: 1rem; }
.site-footer p { margin: 0; }
.site-footer a { color: var(--on-navy); }
.site-footer a:hover { color: var(--on-navy); }
.site-footer :focus-visible { outline-color: var(--on-navy); }

/* ---------- player ---------- */

.player {
  width: min(1080px, calc(100vw - 32px)); max-width: none; max-height: calc(100dvh - 32px);
  padding: 0; border: 0; background: var(--stage); color: #ffffff; overflow: auto;
}
.player::backdrop { background: rgba(6, 10, 22, 0.85); }
.player :focus-visible { outline-color: #ffffff; }

.player-bar { display: flex; justify-content: flex-end; padding: 8px; }
.player-close, .nav-button, .text-button {
  font: inherit; font-size: 1rem; font-weight: 600; color: #ffffff; background: transparent;
  border: 1px solid var(--stage-soft); padding: 9px 16px; cursor: pointer; border-radius: 2px;
}
.player-close { border-color: transparent; }
.player-close:hover, .nav-button:hover:not(:disabled), .text-button:hover { background: rgba(255, 255, 255, 0.12); }
.nav-button:disabled { opacity: 1; color: var(--stage-soft); border-style: dashed; cursor: default; }

.player-stage { background: #000000; }
.player-stage video { display: block; width: 100%; max-height: min(68dvh, 720px); margin: 0 auto; background: #000000; }

.player-info { display: grid; gap: 16px 32px; padding: 20px 24px 24px; }
@media (min-width: 760px) { .player-info { grid-template-columns: 1fr auto; align-items: start; } }
.player-info h2 { color: #ffffff; font-size: 1.6rem; }
.player-category { color: var(--stage-soft); margin: 4px 0 0; }
.player-description { margin: 12px 0 0; max-width: 42em; white-space: pre-line; }
.player-description:empty { display: none; }

.player-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.player-nav { display: flex; gap: 10px; }
.copy-status { color: var(--stage-soft); font-size: 0.95rem; }
.copy-status:empty { display: none; }
@media (min-width: 760px) {
  .player-actions { justify-content: flex-end; flex-wrap: nowrap; }
  .copy-status { order: -1; }
  .player-nav { margin-left: 14px; }
}

@media (max-width: 640px) {
  .player { width: 100vw; height: 100dvh; max-height: none; margin: 0; }
  .player-info { padding: 16px; }
  .player-nav { width: 100%; }
  .player-nav .nav-button { flex: 1; }
}

/* ---------- simple pages (404, sign-in) ---------- */

.simple-page { padding-top: 72px; padding-bottom: 96px; }
.simple-page > * { max-width: 34em; }
.simple-page h1 { font-size: clamp(2rem, 1.5rem + 2vw, 3rem); margin-bottom: 20px; }