* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  padding: 24px;
  background: radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--brand-connection) 20%, var(--brand-canvas)) 0, var(--brand-canvas) 48%);
  color: var(--brand-text);
  font: 16px/1.5 system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

h1, h2, p { margin-top: 0; }
h1, h2 { text-wrap: balance; }
p { color: var(--brand-text-muted); }
a, button, input { touch-action: manipulation; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--brand-focus); outline-offset: 2px; }

.landing-shell { width: min(100%, 960px); margin: auto; padding: clamp(28px, 6vw, 72px) 0; }
.hero { max-width: 820px; }
.brand-symbol { display: block; margin-bottom: 32px; }
.eyebrow { margin-bottom: 12px; color: var(--brand-connection); font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.landing-shell h1 { margin-bottom: 12px; font-size: clamp(42px, 10vw, 76px); line-height: 1; letter-spacing: -.05em; }
.lede { max-width: 760px; font-size: clamp(18px, 2.4vw, 22px); line-height: 1.55; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.collaboration { margin-top: clamp(72px, 10vw, 120px); }
.section-intro { max-width: 680px; }
.section-intro h2 { margin-bottom: 12px; font-size: clamp(30px, 5vw, 46px); line-height: 1.08; letter-spacing: -.035em; }
.section-intro > p:last-child { font-size: 18px; }
.value-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 32px; }
.value-card { min-width: 0; padding: 24px; border-radius: 16px; background: var(--brand-surface); box-shadow: inset 0 0 0 1px var(--brand-hairline); }
.value-card::before { display: block; width: 28px; height: 4px; margin-bottom: 24px; border-radius: 2px; background: var(--brand-connection); content: ""; }
.value-card h3 { margin: 0 0 10px; font-size: 19px; letter-spacing: -.015em; }
.value-card p { margin-bottom: 0; }

.button, button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 10px;
  padding: 0 18px;
  background: var(--brand-connection);
  color: var(--brand-on-accent);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.button.secondary { background: var(--brand-surface-raised); color: var(--brand-text); box-shadow: inset 0 0 0 1px var(--brand-hairline); }
.button:active, button:active { transform: scale(.98); }
button:disabled { cursor: wait; opacity: .55; }

.form-page, .prejoin-page { display: grid; place-items: center; }
.form-shell { width: min(100%, 620px); padding: 32px; border-radius: 20px; background: color-mix(in srgb, var(--brand-surface) 92%, transparent); box-shadow: 0 24px 80px var(--brand-shadow), 0 0 0 1px var(--brand-hairline); }
.form-shell h1 { margin-bottom: 8px; font-size: clamp(28px, 7vw, 40px); line-height: 1.1; letter-spacing: -.03em; }
form { display: grid; gap: 18px; }
label { display: grid; gap: 8px; }
.checkbox-row { grid-template-columns: 20px 1fr; align-items: center; min-height: 44px; cursor: pointer; }
input[type="checkbox"] { width: 20px; height: 20px; margin: 0; }
input[type="password"] { width: 100%; min-height: 48px; border: 0; border-radius: 10px; padding: 0 14px; background: var(--brand-field); color: var(--brand-text); box-shadow: 0 0 0 1px var(--brand-hairline); font: inherit; font-size: 16px; }
#error { min-height: 24px; margin: 0; color: var(--brand-danger); }
[hidden] { display: none !important; }

.prejoin-shell { width: min(440px, calc(100vw - 32px)); padding: 24px; border-radius: 18px; background: var(--brand-surface); box-shadow: 0 24px 80px var(--brand-shadow), 0 0 0 1px var(--brand-hairline); }
.prejoin-shell h1 { margin-bottom: 6px; font-size: 28px; letter-spacing: -.025em; }
.prejoin-shell .intro { margin-bottom: 24px; }
.join-media { display: grid; gap: 12px; padding: 14px; border-radius: 12px; background: var(--brand-field); box-shadow: inset 0 0 0 1px var(--brand-hairline); }
.section-label { margin: 0; color: var(--brand-text-muted); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.join-media-preview { display: block; width: 100%; aspect-ratio: 16 / 9; border-radius: 10px; background: var(--brand-media-canvas); object-fit: cover; }
.join-media-row { display: grid; grid-template-columns: minmax(0, 1fr) 44px; gap: 8px; }
.join-media-row select { min-width: 0; min-height: 44px; border: 0; border-radius: 9px; padding: 0 10px; background: var(--brand-surface-raised); color: var(--brand-text); box-shadow: inset 0 0 0 1px var(--brand-hairline); font: inherit; font-size: 16px; }
.media-toggle { width: 44px; min-width: 44px; min-height: 44px; padding: 0; background: var(--brand-danger); color: var(--brand-canvas); }
.media-toggle[aria-pressed="true"] { background: var(--brand-signal); }
.media-toggle svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.media-toggle .icon-active { display: none; }
.media-toggle[aria-pressed="true"] .icon-active { display: block; }
.media-toggle[aria-pressed="true"] .icon-inactive { display: none; }
.join-media-status { min-height: 20px; margin: 0; color: var(--brand-text-muted); font-size: 13px; }
.call-access { color: var(--brand-text-muted); }
.call-access summary { width: fit-content; min-height: 44px; padding: 11px 2px; cursor: pointer; }
.call-access-options { display: grid; gap: 14px; padding: 4px 0 8px; color: var(--brand-text); }

.downloads { margin-top: clamp(72px, 10vw, 112px); padding-top: 28px; box-shadow: inset 0 1px var(--brand-hairline); }
.downloads h2 { margin-bottom: 6px; }
.downloads > p { margin-bottom: 16px; }
.download-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.download { display: grid; min-height: 46px; place-items: center; border-radius: 10px; padding: 0 12px; background: var(--brand-surface-raised); color: var(--brand-text); box-shadow: inset 0 0 0 1px var(--brand-hairline); font-size: 14px; font-weight: 650; text-decoration: none; }
.download-checksums { margin-top: 12px; color: var(--brand-text-muted); font-size: 13px; }
.download-checksums summary { width: fit-content; min-height: 44px; padding: 12px 4px; color: var(--brand-text-muted); cursor: pointer; }
.checksum-list { display: grid; gap: 1px; overflow: hidden; border-radius: 10px; background: var(--brand-hairline); box-shadow: 0 0 0 1px var(--brand-hairline); }
.checksum { display: grid; grid-template-columns: 70px minmax(0, 1fr) 32px; align-items: center; gap: 10px; min-height: 44px; padding: 6px 8px 6px 12px; background: var(--brand-surface); }
.checksum code { overflow: hidden; color: var(--brand-text-muted); font: 11px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; text-overflow: ellipsis; white-space: nowrap; }
.checksum-copy { position: relative; min-width: 32px; min-height: 32px; border-radius: 7px; padding: 0 7px; background: var(--brand-surface-raised); color: var(--brand-text); font-size: 11px; }
.checksum-copy::before { position: absolute; content: ""; inset: -6px; }

@media (hover: hover) and (pointer: fine) {
  .button:hover, .download:hover { filter: brightness(1.12); }
}

@media (max-width: 520px) {
  body { padding: 16px; }
  .form-shell { padding: 24px; }
  .download-list { grid-template-columns: 1fr; }
  .checksum { grid-template-columns: 64px minmax(0, 1fr) 32px; }
}

@media (max-width: 760px) {
  .value-grid { grid-template-columns: 1fr; }
  .value-card { padding: 20px; }
}