:root {
  color-scheme: light;
  font-family: Inter, system-ui, -apple-system, sans-serif;
  --bg: #f5f7fb;
  --card: #ffffff;
  --accent: #325cda;
  --accent-dark: #2147b7;
  --text: #213047;
  --line: #d8dfeb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  background: linear-gradient(120deg, #2749ac, #2f78eb);
  color: #fff;
  padding: 2rem 1rem;
  text-align: center;
}

.topbar h1 {
  margin: 0;
}

.topnav {
  margin-top: 0.9rem;
  display: inline-flex;
  gap: 0.6rem;
}

.topnav a {
  color: #e8efff;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
}

.topnav a.active {
  background: #fff;
  color: #244ab3;
}

.layout {
  max-width: 1150px;
  margin: 1.5rem auto;
  padding: 0 1rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
}

.layout.single {
  grid-template-columns: 1fr;
  max-width: 950px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 4px 14px rgba(35, 56, 94, 0.08);
}

.stack {
  display: grid;
  gap: 0.75rem;
}

label,
legend {
  font-size: 0.92rem;
  font-weight: 600;
}

input,
textarea,
button {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--line);
  font: inherit;
  padding: 0.65rem 0.8rem;
}

button {
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  border: none;
}

button:hover {
  background: var(--accent-dark);
}

button.secondary {
  background: #e9eefb;
  color: var(--accent);
}

button.danger {
  background: #ffe7e7;
  color: #c22929;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.75rem;
  margin: 0;
}

.slot-row {
  display: grid;
  gap: 0.5rem;
  grid-template-columns: 1fr 90px 40px;
  align-items: center;
}

.event {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.9rem;
}

.event h3 {
  margin: 0 0 0.3rem;
}

.event-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.event-head h3 {
  margin: 0;
}

.event-meta {
  color: #627089;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.slot,
.admin-slot {
  background: #f9fbff;
  border: 1px solid #e5ebf7;
  border-radius: 6px;
  padding: 0.6rem;
  margin-bottom: 0.5rem;
}

.slot small {
  color: #61718a;
}

.signed-up-list {
  margin: 0.45rem 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: #334a74;
}

.signup-form {
  margin-top: 0.55rem;
}

.fields-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.45rem;
  margin-bottom: 0.45rem;
}

.helper-text {
  color: #5c6a81;
  margin-top: 0;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  border-bottom: 1px solid #dce5f5;
  padding: 0.45rem;
  text-align: left;
  vertical-align: top;
}

.empty {
  color: #65748f;
  font-style: italic;
}

.remove-event {
  width: auto;
  padding: 0.45rem 0.75rem;
}