:root {
  color-scheme: light dark;
  --bg: #f5f6f8;
  --panel: #ffffff;
  --text: #1c1f24;
  --muted: #6b7280;
  --accent: #2563eb;
  --border: #e2e5ea;
  --error: #b91c1c;
}

* { 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;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.topbar .brand { font-weight: 700; }

.topbar nav a {
  margin-left: 1.25rem;
  text-decoration: none;
  color: var(--text);
}

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

.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.login-box {
  max-width: 360px;
  margin: 4rem auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
}

.login-box h1 { margin-top: 0; font-size: 1.25rem; }

.login-box label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.login-box input {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
}

.login-box button {
  width: 100%;
  padding: 0.65rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
}

.login-box .hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0;
}

.error {
  color: var(--error);
  font-weight: 600;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text);
}

.card h2 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.day-group { margin-bottom: 1.5rem; }
.day-group h2 { font-size: 1rem; color: var(--muted); border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }

.event-list { list-style: none; margin: 0; padding: 0; }
.event-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 0.75rem;
  align-items: baseline;
  flex-wrap: wrap;
}
.event-time { color: var(--accent); font-size: 0.85rem; }
.event-location { color: var(--muted); font-size: 0.85rem; }

.contact-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
}
.contact-table th, .contact-table td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.contact-table th { color: var(--muted); font-weight: 600; }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --panel: #1d2025;
    --text: #e7e9ec;
    --muted: #9aa1ab;
    --border: #2c3037;
  }
}