/* ChiroLabs hub — single stylesheet, no external assets. */

:root {
  --sky-top: #47a1e6;
  --sky-mid: #8ecbf3;
  --sky-low: #eef7fd;
  --glow: rgba(255, 214, 120, 0.7);

  --ink: #0c2a4a;          /* headings on the gradient and cards */
  --ink-body: #1f3347;     /* card body text, ~13:1 on white */
  --ink-muted: #4f6478;    /* secondary text, ~6:1 on white */
  --accent: #0d5ea8;       /* links / actions, ~6.7:1 on white */
  --accent-strong: #094a86;
  --warm: #9a5b00;         /* kicker text, ~5.6:1 on white */
  --chip-bg: #e6f2fc;
  --chip-ink: #1f4f7c;

  --card-bg: rgba(255, 255, 255, 0.94);
  --card-border: rgba(255, 255, 255, 0.9);
  --shadow: 0 12px 32px rgba(18, 66, 110, 0.14), 0 1px 2px rgba(18, 66, 110, 0.08);
  --shadow-hover: 0 18px 44px rgba(18, 66, 110, 0.2), 0 2px 4px rgba(18, 66, 110, 0.1);

  --radius: 1.25rem;
  --wrap: 72rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--ink-body);
  background-color: var(--sky-mid);
  overflow-x: hidden;
}

/* ---------- backdrop ---------- */

.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 48%, var(--sky-low) 100%);
  pointer-events: none;
}

.glow {
  position: absolute;
  top: -22vmin;
  right: -14vmin;
  width: 70vmin;
  height: 70vmin;
  border-radius: 50%;
  background: radial-gradient(circle at center, var(--glow) 0%, rgba(255, 214, 120, 0.28) 38%, rgba(255, 214, 120, 0) 70%);
}

.cloud {
  position: absolute;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 50%;
  filter: drop-shadow(0 10px 18px rgba(20, 70, 120, 0.08));
  animation: drift 120s ease-in-out infinite alternate;
}
.cloud::before, .cloud::after {
  content: "";
  position: absolute;
  background: inherit;
  border-radius: 50%;
}
/* Base shape is a wide ellipse; the pseudo-elements add two rounded tops. */
.cloud--1 { width: 34vmin; height: 12vmin; top: 12%; left: -6%; animation-duration: 130s; }
.cloud--1::before { width: 15vmin; height: 15vmin; top: -8vmin; left: 6vmin; }
.cloud--1::after  { width: 11vmin; height: 11vmin; top: -5vmin; left: 18vmin; }

.cloud--2 { width: 44vmin; height: 14vmin; top: 26%; right: -10%; opacity: 0.85; animation-duration: 160s; animation-direction: alternate-reverse; }
.cloud--2::before { width: 20vmin; height: 20vmin; top: -11vmin; left: 9vmin; }
.cloud--2::after  { width: 14vmin; height: 14vmin; top: -7vmin; left: 25vmin; }

.cloud--3 { width: 28vmin; height: 10vmin; top: 58%; left: 12%; opacity: 0.75; animation-duration: 145s; animation-delay: -40s; }
.cloud--3::before { width: 12vmin; height: 12vmin; top: -6vmin; left: 5vmin; }
.cloud--3::after  { width: 9vmin; height: 9vmin; top: -4vmin; left: 14vmin; }

.cloud--4 { width: 38vmin; height: 12vmin; top: 74%; right: 6%; opacity: 0.7; animation-duration: 175s; animation-direction: alternate-reverse; animation-delay: -70s; }
.cloud--4::before { width: 16vmin; height: 16vmin; top: -9vmin; left: 8vmin; }
.cloud--4::after  { width: 12vmin; height: 12vmin; top: -6vmin; left: 21vmin; }

@keyframes drift {
  from { transform: translateX(0); }
  to   { transform: translateX(9vw); }
}

@media (prefers-reduced-motion: reduce) {
  .cloud { animation: none; }
  .card, .card__arrow, .button { transition: none; }
  .card:hover { transform: none; }
}

/* ---------- layout ---------- */

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

main {
  flex: 1;
  padding-block: 0 clamp(3rem, 8vw, 6rem);
}

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }

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

.masthead {
  padding-block: clamp(2.5rem, 7vw, 5.5rem) clamp(2rem, 5vw, 3.5rem);
  color: var(--ink);
}
.masthead--compact { padding-block: clamp(1.5rem, 4vw, 2.5rem); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 clamp(1.25rem, 3vw, 2rem);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.01em;
}
.brand__mark {
  width: 1.4em;
  height: 1.4em;
  border-radius: 0.4em;
  background: linear-gradient(180deg, #ffffff 0%, #dcefff 100%);
  box-shadow: 0 4px 12px rgba(18, 66, 110, 0.18);
  position: relative;
  flex: none;
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset: 25%;
  border-radius: 50%;
  border: 0.22em solid var(--accent);
  border-right-color: transparent;
}
.brand__link { color: inherit; text-decoration: none; }
.brand__link:hover { text-decoration: underline; }

.masthead__title {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(1.9rem, 1.2rem + 3vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 750;
  text-wrap: balance;
}

.masthead__lede {
  margin: 1.25rem 0 0;
  max-width: 56ch;
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.25rem);
  color: var(--ink);
  opacity: 0.92;
}

/* ---------- site list ---------- */

.sites__heading {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
}

.site-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 2.5vw, 1.75rem);
}

.card {
  flex: 1 1 20rem;
  max-width: 34rem;
  min-width: 0;
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.card:focus-within { outline: 3px solid var(--ink); outline-offset: 3px; }

.card__body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  height: 100%;
  padding: clamp(1.25rem, 3vw, 1.75rem);
}

.card__kicker {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--warm);
}

.card__title {
  margin: 0;
  font-size: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-wrap: balance;
}

.card__link {
  color: inherit;
  text-decoration: none;
}
.card__link:focus { outline: none; } /* focus is shown on the card via :focus-within */
/* Make the whole card the click target. */
.card__link::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}
.card:hover .card__link { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }

.card__desc {
  margin: 0;
  color: var(--ink-body);
}

.card__tags {
  list-style: none;
  margin: 0.25rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.card__tags li {
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--chip-bg);
  color: var(--chip-ink);
  font-size: 0.8rem;
  font-weight: 600;
}

.card__host {
  margin: auto 0 0;
  padding-top: 0.5rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent);
  overflow-wrap: anywhere;
}
.card__arrow {
  display: inline-block;
  transition: transform 180ms ease;
}
.card:hover .card__arrow { transform: translateX(4px); }

/* 404 notice */
.card--notice { max-width: 40rem; }
.card--notice .card__title { font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.25rem); }

.button {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 150ms ease;
}
.button:hover { background: var(--accent-strong); }
.button:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }

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

.footer {
  padding-block: 2rem 2.5rem;
  color: var(--ink);
  font-size: 0.9rem;
  border-top: 1px solid rgba(12, 42, 74, 0.12);
}
.footer__inner {
  display: grid;
  gap: 0.5rem;
}
.footer__brand { margin: 0; font-weight: 700; }
.footer__note { margin: 0; max-width: 64ch; color: var(--ink); opacity: 0.85; }
.footer__copy { margin: 0.25rem 0 0; opacity: 0.75; }

@media (min-width: 48rem) {
  .footer__inner {
    grid-template-columns: 1fr auto;
    align-items: start;
  }
  .footer__note { grid-column: 1; }
  .footer__copy { grid-column: 2; grid-row: 1 / span 2; margin: 0; }
}

/* generic focus for anything not covered above */
a:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; border-radius: 0.25rem; }