:root {
  --bg: #f6f7f6;
  --surface: #ffffff;
  --text: #1c2320;
  --muted: #5d6863;
  --border: #dde3e0;
  --accent: #0f766e;
  --accent-text: #ffffff;
  --badge-bg: #eef2f0;
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111614;
    --surface: #1a201e;
    --text: #e6ebe8;
    --muted: #9aa6a0;
    --border: #2c3532;
    --accent: #2dd4bf;
    --accent-text: #06201d;
    --badge-bg: #242c29;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

h1 { font-size: 1.6rem; margin: 0 0 0.25rem; }
h2 { font-size: 1.05rem; margin: 0; }
a { color: var(--accent); }
.muted { color: var(--muted); }

.wordmark {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.wordmark span { color: var(--accent); }
.wordmark.large { font-size: 2.5rem; margin: 0; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.topbar-user { display: flex; align-items: center; gap: 1rem; font-size: 0.9rem; flex-wrap: wrap; }
.topbar-user form { margin: 0; }

.page { max-width: 960px; margin: 0 auto; padding: 2rem 1rem; }
.page.narrow { max-width: 480px; }
.center { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}
.login { width: 100%; max-width: 380px; text-align: center; }
.login form { margin: 1.5rem 0 0.75rem; }
.hint { font-size: 0.85rem; color: var(--muted); margin: 0; }

button, .button {
  font: inherit;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 0.6rem 1rem;
  text-decoration: none;
  display: inline-block;
}
button.primary, .button.primary {
  width: 100%;
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}
button.link {
  border: 0;
  padding: 0;
  background: none;
  color: var(--accent);
}

.tiles {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
}
.tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.tile p { margin: 0.5rem 0 0; color: var(--muted); font-size: 0.95rem; }
.tile-head { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.badge {
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--badge-bg);
  color: var(--muted);
  white-space: nowrap;
}

.messages { list-style: none; padding: 0.75rem 1rem; margin: 0 0 1rem; background: var(--badge-bg); border-radius: 8px; }