:root {
  color-scheme: light dark;
  --bg: #f6f6f4;
  --surface: #fcfcfb;
  --border: #e2e1dc;
  --text: #0b0b0b;
  --muted: #52514e;
  --accent: #2a78d6;
  --danger: #c62f2e;
  --on-accent: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --surface: #1a1a1d;
    --border: #2c2c31;
    --text: #ededee;
    --muted: #a1a1a8;
    --accent: #5aa2f0;
    --danger: #f07171;
    --on-accent: #0b0b0b;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header,
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

header {
  padding-top: 40px;
  padding-bottom: 8px;
}

h1 {
  margin: 0 0 4px;
  font-size: 1.6rem;
}

.muted {
  margin: 0;
  color: var(--muted);
}

.grid {
  list-style: none;
  margin: 24px 0 40px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  display: block;
  height: 100%;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: inherit;
  text-decoration: none;
}

a.card:hover,
a.card:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

a.card h2 {
  color: var(--accent);
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.card .meta {
  margin-top: 12px;
  font-size: 0.85rem;
}

.card.disabled {
  opacity: 0.6;
}

.error {
  color: var(--danger);
}

.title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.sign-out {
  color: var(--muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

.login {
  max-width: 360px;
  padding-top: 15vh;
}

.login form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 24px 0 12px;
}

.login label {
  font-size: 0.9rem;
  font-weight: 600;
}

.login input {
  padding: 10px 12px;
  font: inherit;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.login input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.login button {
  margin-top: 8px;
  padding: 10px 12px;
  font: inherit;
  font-weight: 600;
  color: var(--on-accent);
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}