:root {
  color-scheme: dark;
  --bg: #15161b;
  --bg-elevated: #1e2029;
  --bg-card: #262a36;
  --border: #363c4e;
  --text: #e7e9ee;
  --text-dim: #9aa0b4;
  --accent: #6ee7b7;
  --accent-strong: #34d399;
  --danger: #e05252;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 0.5rem;
}

header.topbar .brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
}

nav.main-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
}

nav.main-nav a {
  color: var(--text-dim);
  font-weight: 600;
}
nav.main-nav a.active,
nav.main-nav a:hover {
  color: var(--text);
}

.whoami {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
}

h1, h2, h3 {
  margin-top: 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}

.dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  display: inline-block;
  flex: none;
}

form.inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: end;
}

label {
  display: flex;
  flex-direction: column;
  font-size: 0.8rem;
  color: var(--text-dim);
  gap: 0.25rem;
}

input, select, textarea, button {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
}

textarea {
  min-width: 220px;
}

button, input[type="submit"] {
  cursor: pointer;
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: #0a1f17;
  font-weight: 700;
}
button:hover, input[type="submit"]:hover {
  filter: brightness(1.08);
}

button.secondary {
  background: var(--bg-elevated);
  color: var(--text);
}

button.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: white;
}

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

.login-wrap {
  max-width: 360px;
  margin: 4rem auto;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.75rem;
}

.day-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  min-height: 160px;
}

.day-col.today {
  border-color: var(--accent-strong);
}

.day-col h3 {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.block {
  border-radius: 6px;
  padding: 0.3rem 0.5rem;
  margin-bottom: 0.4rem;
  font-size: 0.82rem;
}

.block.attendance {
  background: var(--bg-elevated);
  border-left: 3px solid var(--accent);
}

.block.session {
  background: var(--bg-elevated);
  border-left: 3px solid #e0a052;
}

.nav-week {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.view-toggle {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}
.view-toggle a {
  color: var(--text-dim);
  font-weight: 600;
}
.view-toggle a.active,
.view-toggle a:hover {
  color: var(--text);
}

ul.plain {
  list-style: none;
  padding: 0;
  margin: 0;
}

ul.plain li {
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
}
ul.plain li:last-child {
  border-bottom: none;
}

.muted {
  color: var(--text-dim);
}

.small {
  font-size: 0.8rem;
}

.delete-x {
  background: none;
  border: none;
  color: var(--danger);
  font-weight: 700;
  padding: 0 0.25rem;
}