:root {
  color-scheme: light dark;
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c1f24;
  --muted: #5b6472;
  --border: #dde1e6;
  --accent: #2d6cdf;
  --error: #b3261e;
  --success: #1e6b3e;
}

* { box-sizing: border-box; }

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar .brand {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
  text-decoration: none;
}

.topbar nav a {
  margin-left: 1.2rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.topbar nav a:hover { color: var(--accent); }

.content {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.flashes { list-style: none; padding: 0; margin: 0 0 1.5rem; }
.flash {
  padding: 0.7rem 1rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}
.flash-error { background: #fbe9e7; color: var(--error); }
.flash-success { background: #e6f4ea; color: var(--success); }
.flash-info { background: #e8eef7; color: var(--accent); }

.login-card {
  max-width: 360px;
  margin: 3rem auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}

.login-card h1 { margin-top: 0; font-size: 1.4rem; }

.login-card form { display: flex; flex-direction: column; gap: 0.4rem; }

.login-card label { font-size: 0.85rem; color: var(--muted); margin-top: 0.6rem; }

.login-card input {
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
}

.login-card button {
  margin-top: 1.2rem;
  padding: 0.7rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.2rem;
}

.tile {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.4rem;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.tile:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.tile-icon { font-size: 2rem; }
.tile-title { font-weight: 600; font-size: 1.05rem; }
.tile-description { color: var(--muted); font-size: 0.9rem; }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1d2025;
    --text: #eef1f5;
    --muted: #9aa4b2;
    --border: #2c3038;
  }
}

table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
th, td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); }
.btn {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border: none;
  font-size: 0.95rem;
  cursor: pointer;
}
.btn-secondary { background: var(--muted); }
.row-actions { white-space: normal; }