/* Shared styles for the /vid mini-site. Pages: / (hero), /rep/, /learn/…, /about/ */
:root {
  color-scheme: light;
  --paper: #f7f9ff;
  --mist: #ffffff;
  --pebble: #dfe6f3;
  --stone: #68748b;
  --charcoal: #172033;
  --body: #3f4c63;
  --slate: #647189;
  --ink: #111827;
  --accent: #2457ff;
  --accent-dark: #173fc9;
  --accent-deep: #173fc9;
  --acid: #ff5c8a;
  --line: rgba(23, 32, 51, .11);
  --line-strong: rgba(23, 32, 51, .2);
  --surface: #ffffff;
  --surface-raised: #eef3ff;
  --col: 460px;
  --wide: 1080px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 86% 5%, rgba(36, 87, 255, .1), transparent 28rem),
    radial-gradient(circle at 4% 42%, rgba(255, 92, 138, .07), transparent 24rem),
    var(--paper);
  color: var(--charcoal);
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.66;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3 { font-family: 'Space Grotesk', 'Manrope', sans-serif; }
::selection { background: var(--accent); color: var(--ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
a { color: var(--accent-deep); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--accent-dark); }
strong { font-weight: 700; color: var(--charcoal); }

.col { max-width: var(--col); margin: 0 auto; padding: 0 22px; }
@media (min-width: 900px) { .col { max-width: var(--wide); padding: 0 38px; } }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 43px;
  background: var(--accent);
  color: #fff;
  font-family: 'Manrope', sans-serif;
  font-weight: 750;
  font-size: 12px;
  letter-spacing: .015em;
  padding: 10px 18px;
  border: 1px solid var(--accent);
  border-radius: 3px;
  box-shadow: 0 0 0 rgba(36, 87, 255, 0);
  text-decoration: none;
  cursor: pointer;
  transition: background-color .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease, transform .2s ease;
  white-space: nowrap;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; box-shadow: 0 9px 22px rgba(36, 87, 255, .2); transform: translateY(-1px); }
.btn:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(36, 87, 255, .15); }
.btn-block { display: flex; width: 100%; max-width: 360px; text-align: center; }
.btn-ghost { background: var(--surface); color: var(--charcoal); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--surface-raised); border-color: rgba(36,87,255,.42); color: var(--accent-deep); }
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 750;
  line-height: 1.4;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.kicker::before { content: ''; width: 5px; height: 5px; background: currentColor; border-radius: 50%; }
.muted { font-size: 13px; color: var(--slate); }
.src { display: block; margin-top: 8px; font-size: 12px; color: var(--slate); }
.src a { color: inherit; text-decoration: none; border-bottom: 1px dotted currentColor; cursor: help; }
.figure .src { margin-top: 10px; font: 500 12px/1.4 system-ui, sans-serif; letter-spacing: 0; }

/* ---- top bar (every page) ---- */
.topbar { position: sticky; top: 0; z-index: 40; background: rgba(247,249,255,.9); border-bottom: 1px solid var(--line); -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px); }
.tbin { max-width: var(--col); margin: 0 auto; padding: 14px 22px 13px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.topbar h1 { font-weight: 650; font-size: 25px; line-height: 1; letter-spacing: -.045em; color: var(--charcoal); }
.topbar h1 a { color: inherit; text-decoration: none; }
.topnav { display: none; gap: 7px; align-items: center; }
.topnav .btn { min-height: 35px; padding: 7px 12px; font-size: 11px; }
.topnav .btn-ghost { background: transparent; color: var(--charcoal); }
.topnav .btn-ghost:hover { background: rgba(36,87,255,.07); color: var(--accent); }
.topnav .txt { font-size: 12px; font-weight: 650; color: var(--slate); text-decoration: none; padding: 7px 8px; }
.topnav .txt:hover { color: var(--accent); }
@media (min-width: 900px) { .tbin { max-width: var(--wide); padding: 14px 38px 13px; } .topnav { display: flex; } }

/* ---- bottom dock (mobile, every page) ---- */
.dock { position: sticky; bottom: 0; z-index: 30; background: rgba(247,249,255,.94); border-top: 1px solid var(--line-strong); -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px); }
.dockin { max-width: var(--col); margin: 0 auto; padding: 9px 10px 11px; display: flex; gap: 6px; justify-content: center; }
.dock .btn { flex: 1; min-height: 39px; padding: 8px 3px; font-size: 9.5px; letter-spacing: 0; text-align: center; }
.dock .btn-ghost { background: #fff; color: var(--body); }
@media (min-width: 900px) { .dock { display: none; } }

/* ---- page sections ---- */
.page { padding: 52px 0 30px; }
.page h2 { font-size: clamp(40px, 7vw, 70px); font-weight: 560; line-height: 1.02; letter-spacing: -.055em; margin: 15px 0 24px; text-wrap: balance; }
.page h3 { font-size: 27px; font-weight: 560; line-height: 1.08; letter-spacing: -.035em; margin: 40px 0 13px; }
.page p { color: var(--body); margin-bottom: 17px; }
.sub { font-size: 16px; max-width: 680px; }
.two { display: grid; gap: 38px; }
@media (min-width: 900px) {
  .page { padding: 88px 0 52px; }
  .two { grid-template-columns: .92fr 1.08fr; gap: 84px; align-items: start; }
}
.cards { display: grid; gap: 10px; margin-top: 24px; }
.card { position: relative; background: rgba(255,255,255,.88); border: 1px solid var(--line); border-radius: 3px; padding: 21px 19px 23px; font-size: 14px; line-height: 1.58; color: var(--body); overflow: hidden; box-shadow: 0 12px 34px rgba(32,49,89,.06); }
.card::before { content: ''; position: absolute; top: 0; left: 18px; width: 42px; height: 3px; background: linear-gradient(90deg, var(--accent), var(--acid)); }
.card b { display: block; color: var(--charcoal); font-family: 'Space Grotesk', sans-serif; font-size: 21px; font-weight: 560; line-height: 1.16; letter-spacing: -.025em; margin-bottom: 10px; }
@media (min-width: 900px) {
  .cards { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .card { padding: 27px 25px 29px; }
  .card::before { left: 24px; width: 48px; }
}
.demands { list-style: none; display: grid; gap: 0; margin: 23px 0; counter-reset: d; border-bottom: 1px solid var(--line); }
.demands li { display: grid; grid-template-columns: 37px 1fr; gap: 10px; align-items: baseline; padding: 16px 2px; border-top: 1px solid var(--line); font-size: 15px; color: var(--body); }
.demands li::before { counter-increment: d; content: counter(d, decimal-leading-zero); font: 600 13px 'Space Grotesk', sans-serif; color: var(--accent); letter-spacing: .06em; }
.demands b { color: var(--charcoal); }
.figure { position: relative; border: 1px solid rgba(36,87,255,.2); border-radius: 3px; background: radial-gradient(circle at 74% 25%, rgba(255,92,138,.2), transparent 34%), linear-gradient(145deg, #f1f5ff, #e8eeff); min-height: 220px; display: grid; place-items: center; text-align: center; padding: 24px; font: 560 25px/1.08 'Space Grotesk', sans-serif; letter-spacing: -.03em; color: var(--charcoal); margin: 28px 0; box-shadow: 0 20px 54px rgba(36,87,255,.09); overflow: hidden; }
.figure::after { content: ''; position: absolute; inset: 10px; border: 1px solid rgba(36,87,255,.13); pointer-events: none; }

/* index lists (learn) */
.idx { margin-top: 26px; border-top: 1px solid var(--line-strong); }
.idxrow { position: relative; display: flex; gap: 14px; align-items: baseline; padding: 18px 3px; border-bottom: 1px solid var(--line); text-decoration: none; transition: background-color .2s ease, padding .2s ease, border-color .2s ease; }
.idxrow .it { font-family: 'Space Grotesk', sans-serif; font-weight: 560; font-size: 20px; line-height: 1.12; letter-spacing: -.025em; color: var(--charcoal); }
.idxrow .id { font-family: 'Manrope', sans-serif; font-size: 12.5px; line-height: 1.5; color: var(--slate); display: block; font-weight: 400; margin-top: 6px; }
.idxrow .ia { margin-left: auto; color: var(--accent); font-size: 18px; font-weight: 500; flex-shrink: 0; }
.idxrow:hover { background: rgba(36,87,255,.05); border-color: rgba(36,87,255,.26); padding-left: 11px; padding-right: 11px; }
@media (min-width: 900px) {
  .idx { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; border: 0; margin-top: 36px; }
  .idxrow { min-height: 166px; flex-direction: column; justify-content: space-between; border: 1px solid var(--line); border-radius: 3px; padding: 24px; background: rgba(255,255,255,.84); box-shadow: 0 12px 34px rgba(32,49,89,.05); }
  .idxrow .it { font-size: 24px; }
  .idxrow .ia { margin-left: 0; margin-top: 12px; }
  .idxrow:hover { padding: 24px; border-color: rgba(36,87,255,.36); }
}
.related { margin-top: 52px; padding-top: 18px; border-top: 1px solid var(--line-strong); }
.related h3 { margin: 0 0 9px; color: var(--accent); font: 750 10px/1 'Manrope', sans-serif; letter-spacing: .14em; text-transform: uppercase; }
.related a { display: block; padding: 12px 3px; border-bottom: 1px solid var(--line); color: var(--body); font-weight: 600; text-decoration: none; transition: color .2s ease, padding .2s ease, background-color .2s ease; }
.related a:hover { background: rgba(36,87,255,.04); color: var(--accent-deep); padding-left: 9px; }
.crumb { font-size: 11px; color: var(--slate); margin-bottom: 20px; letter-spacing: .06em; font-weight: 650; }
.crumb a { color: var(--slate); text-decoration: none; }
.crumb a:hover { color: var(--accent); }

/* forms */
form { margin-top: 4px; max-width: 540px; padding: 22px; background: #fff; border: 1px solid var(--line-strong); border-radius: 3px; box-shadow: 0 20px 54px rgba(32,49,89,.09); }
.field { margin-bottom: 17px; }
.field label { display: block; font-size: 10px; font-weight: 750; letter-spacing: .1em; color: var(--slate); margin-bottom: 7px; }
.field input, .field textarea { width: 100%; font-family: 'Manrope', sans-serif; font-size: 15px; color: var(--charcoal); background: var(--paper); border: 1px solid var(--line-strong); border-radius: 3px; padding: 12px 13px; line-height: 1.45; transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease; }
.field input:focus, .field textarea:focus { background: #fff; border-color: var(--accent); outline: 0; box-shadow: 0 0 0 3px rgba(36,87,255,.11); }
.field textarea { min-height: 130px; resize: vertical; }
.notice { margin-top: 13px; font-size: 13px; color: var(--accent-deep); font-weight: 650; }

/* footer */
footer { border-top: 1px solid var(--line); margin-top: 54px; padding: 22px 0 32px; }
footer .col { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.cmark { width: 28px; height: 28px; border-radius: 3px; border: 1px solid rgba(36,87,255,.3); background: rgba(36,87,255,.07); display: grid; place-items: center; font: 650 12px 'Space Grotesk', sans-serif; color: var(--accent); }
footer p { font-size: 11px; color: var(--slate); }
footer a { color: var(--slate); }
footer .flinks { margin-left: auto; display: flex; gap: 14px; font-size: 11px; font-weight: 650; }
footer .flinks a { text-decoration: none; }
body.has-dock footer { padding-bottom: 96px; }
@media (min-width: 900px) { body.has-dock footer { padding-bottom: 32px; } }

/* sheets (Join / Share) */
.sheet { position: fixed; inset: 0; z-index: 60; display: flex; align-items: flex-end; justify-content: center; background: rgba(17,24,39,.58); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); padding: 16px; }
@media (min-width: 900px) { .sheet { align-items: center; } }
.sheetcard { background: #fff; border: 1px solid var(--line-strong); border-radius: 3px; box-shadow: 0 30px 90px rgba(17,24,39,.24); padding: 25px 22px; width: 100%; max-width: 430px; }
.sheet h3 { font-size: 32px; font-weight: 560; line-height: 1; letter-spacing: -.045em; margin: 0; }
.sheetfoot { display: flex; gap: 9px; align-items: center; margin-top: 20px; flex-wrap: wrap; }
.shareopts { display: grid; gap: 7px; margin-top: 18px; }
.shareopts button, .shareopts a { display: block; width: 100%; text-align: left; background: var(--paper); border: 1px solid var(--line); border-radius: 3px; padding: 12px 14px; font: 650 13px 'Manrope', sans-serif; color: var(--body); cursor: pointer; text-decoration: none; transition: background-color .2s ease, border-color .2s ease, color .2s ease; }
.shareopts button:hover, .shareopts a:hover { background: var(--surface-raised); border-color: rgba(36,87,255,.32); color: var(--accent-deep); }
.sheet[hidden] { display: none; }
html:not(.js) .sheet, html:not(.js) .sheet[hidden] { position: static; inset: auto; background: none; padding: 0; margin-top: 16px; display: block; }

/* Front-page bands, keyed to existing section IDs. */
#evidence { margin-top: 48px; background: linear-gradient(180deg, rgba(36,87,255,.065), rgba(36,87,255,.015)); border-top: 1px solid rgba(36,87,255,.16); border-bottom: 1px solid var(--line); }
#evidence .kicker { color: var(--accent); }
#movement { padding-top: 58px; }