:root {
  --bg: #f3efe6;
  --ink: #1c2430;
  --muted: #5e6872;
  --card: #fffdf9;
  --line: #e6dece;
  --accent: #0f6e6b;
  --accent-dark: #0b5553;
  --danger: #9b2c2c;
  --full: #efe8dc;
  --shadow: 0 10px 30px rgba(28, 36, 48, 0.06);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(15, 110, 107, 0.08), transparent 36%),
    var(--bg);
  color: var(--ink);
  font-family: "Tajawal", "Segoe UI", Tahoma, sans-serif;
  line-height: 1.6;
}

.wrap {
  width: min(100% - 2rem, 34rem);
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
}

.page-header h1,
.card h2,
.done h2 {
  margin: 0.15rem 0 0.4rem;
  line-height: 1.3;
}

.page-header h1 {
  font-size: 1.85rem;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
}

.lead,
.hint {
  color: var(--muted);
}

.card {
  margin-top: 1rem;
  padding: 1.15rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  box-shadow: var(--shadow);
}

form,
.groups {
  display: grid;
  gap: 0.85rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 700;
}

input {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

input:focus {
  outline: 3px solid rgba(15, 110, 107, 0.2);
  border-color: var(--accent);
}

button {
  min-height: 3rem;
  border: 0;
  border-radius: 0.85rem;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

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

button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

button.secondary {
  background: transparent;
  color: var(--accent-dark);
  border: 1px solid var(--accent);
}

button.text-button {
  min-height: auto;
  padding: 0;
  background: transparent;
  color: var(--accent-dark);
  justify-self: start;
}

.summary {
  display: grid;
  gap: 0.25rem;
  margin-bottom: 0.4rem;
}

.summary p {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 0;
}

.summary span {
  color: var(--muted);
}

.group {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: 100%;
  padding: 0.85rem 1rem;
  text-align: right;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
}

.group strong,
.group small {
  display: block;
}

.group small {
  color: var(--muted);
  font-weight: 500;
}

.group .seats {
  font-weight: 700;
  color: var(--accent-dark);
  white-space: nowrap;
}

.group.selected {
  background: #e7f4f3;
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.group.full {
  background: var(--full);
}

.group.full .seats {
  color: var(--muted);
}

.message {
  margin: 0;
  padding: 0.7rem 0.85rem;
  border-radius: 0.75rem;
}

.message.error {
  background: #fdecec;
  color: var(--danger);
}

.message.info {
  background: #e7f4f3;
  color: var(--accent-dark);
}

.confirm {
  display: grid;
  gap: 0.75rem;
  margin: 1rem 0 1.2rem;
}

.confirm div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--line);
}

.confirm dt {
  color: var(--muted);
}

.confirm dd {
  margin: 0;
  font-weight: 700;
}

.results-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.8rem;
}

.results-bar .hint,
.results-bar button,
.results-bar h2 {
  margin: 0;
}

.student-bar {
  margin-top: 1.4rem;
}

.day-group {
  margin-top: 0.9rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--line);
}

.day-group h3 {
  margin: 0 0 0.3rem;
  font-size: 1.2rem;
}

.day-group ol {
  margin: 0;
  padding-right: 1.3rem;
}

.day-group li {
  margin: 0.15rem 0;
}

.day-group span {
  color: var(--muted);
  font-weight: 500;
}

.admin-wrap {
  width: min(100% - 2rem, 52rem);
}

#results > .results-bar h2 {
  font-size: 1.45rem;
}

#results > .hint {
  font-size: 1rem;
}

table.day-table {
  font-size: 1.55rem;
  line-height: 1.35;
}

table.day-table th,
table.day-table td {
  padding: 0.55rem 0.2rem;
  font-size: 1.55rem;
  font-weight: 700;
  white-space: normal;
}

.day-table tfoot th,
.day-table tfoot td {
  font-weight: 700;
  color: var(--ink);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  padding: 0.65rem 0.35rem;
  border-bottom: 1px solid var(--line);
  text-align: right;
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-weight: 500;
}

.page-footer {
  margin-top: 1.25rem;
  text-align: center;
}

.page-footer a {
  color: var(--muted);
}