:root {
  --bg: #ffffff;
  --fg: #111827;
  --muted: #4b5563;
  --line: #e5e7eb;
  --card: #f9fafb;
  --accent: #1d4ed8;
  --mono:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New",
    monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.55;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 18px;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #ffffffcc;
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.bar {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.title {
  font-weight: 750;
  letter-spacing: -0.02em;
}
.subtitle {
  color: var(--muted);
  font-size: 0.95rem;
}

nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
nav a {
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--fg);
}
nav a:hover {
  background: var(--card);
  border-color: var(--line);
  text-decoration: none;
}

main {
  padding: 18px 0 34px;
}

h1 {
  margin: 10px 0 8px;
  font-size: clamp(1.55rem, 2.2vw, 2.2rem);
  letter-spacing: -0.03em;
}
h2 {
  margin: 22px 0 10px;
  letter-spacing: -0.02em;
}

p {
  margin: 8px 0;
  color: var(--muted);
  max-width: 85ch;
}

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  .grid {
    grid-template-columns: 1.3fr 0.8fr;
  }
}

.card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 16px;
  padding: 14px 16px;
}

.card-title {
  margin: 0 0 6px 0;
}
.mt {
  margin-top: 12px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0 0;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--fg);
  font-size: 0.92rem;
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #0f766e;
  display: inline-block;
}

.table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}
.table th,
.table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.table th {
  text-align: left;
  background: #f3f4f6;
  font-weight: 650;
}
.table tr:last-child td {
  border-bottom: none;
}

code {
  font-family: var(--mono);
}

.note {
  border-left: 4px solid var(--accent);
  background: #eff6ff;
  border-radius: 12px;
  padding: 10px 12px;
  color: #1f2937;
}

.small {
  font-size: 0.95rem;
  color: var(--muted);
}

ul {
  margin: 8px 0 0 18px;
}
.tight li {
  margin: 4px 0;
}

footer {
  border-top: 1px solid var(--line);
  padding: 16px 0 0;
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Footer sponsor strip */
.sponsors {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding: 6px 0 12px;
}

.sponsors-label {
  font-size: 0.95rem;
  color: var(--muted);
  white-space: nowrap;
}

.sponsors-logos {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.sponsors-logos img {
  height: 44px;          /* tweak to taste */
  width: auto;
  display: block;
  max-width: 260px; /* optional: keep wide logos in check */
  opacity: 0.88;
  filter: grayscale(100%);
  transition: filter 160ms ease, opacity 160ms ease;
}

.sponsors-logos img:hover {
  filter: grayscale(0%);
  opacity: 1;
}

/* Mobile: center nicely */
@media (max-width: 520px) {
  .sponsors {
    justify-content: center;
    text-align: center;
  }
  .sponsors-logos {
    justify-content: center;
  }
}

.sponsor-link {
  display: inline-flex;
  align-items: center;
  border-radius: 10px;
  padding: 4px;
  text-decoration: none;
}

.sponsor-link:focus-visible {
  outline: 2px solid rgba(0,0,0,0.25);
  outline-offset: 2px;
}

.sponsor-link:hover img,
.sponsor-link:focus-visible img {
  filter: grayscale(0%);
  opacity: 1;
}