:root {
  color-scheme: light;
  --ink: #18212f;
  --muted: #687386;
  --line: #d8dee8;
  --surface: #ffffff;
  --page: #f5f7fb;
  --primary: #0f766e;
  --primary-dark: #115e59;
  --accent: #b45309;
  --danger: #b42318;
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--page);
  color: var(--ink);
}

button,
input,
select,
textarea {
  font: inherit;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px clamp(18px, 4vw, 48px);
  background: #fff;
  border-bottom: 1px solid var(--line);
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.05;
}

h2 {
  font-size: 1.25rem;
}

h3 {
  font-size: 1.05rem;
}

.eyebrow {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.admin-link {
  color: var(--primary-dark);
  font-weight: 700;
  text-decoration: none;
}

.top-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.user-badge {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: #f9fafc;
  font-size: .86rem;
  font-weight: 800;
}

.link-button {
  border: 0;
  padding: 0;
  color: var(--danger);
  background: transparent;
  cursor: pointer;
  font-weight: 800;
}

.layout {
  display: grid;
  grid-template-columns: minmax(360px, 1.3fr) minmax(340px, .7fr);
  gap: 24px;
  padding: 24px clamp(18px, 4vw, 48px) 48px;
}

.layout.no-selection {
  grid-template-columns: minmax(360px, 1fr);
}

.calendar-panel,
.booking-panel,
.admin-form-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.calendar-panel {
  padding: 18px;
}

.booking-panel {
  padding: 18px;
  min-height: 620px;
}

.month-controls {
  display: grid;
  grid-template-columns: 42px 1fr 42px;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.month-controls h2 {
  text-align: center;
}

.icon-button {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-size: 1.4rem;
  line-height: 1;
}

.icon-button:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
}

.weekday-grid,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.weekday-grid {
  color: var(--muted);
  font-size: .8rem;
  font-weight: 700;
  text-align: center;
}

.weekday-grid span {
  padding: 0 0 10px;
}

.calendar-grid {
  gap: 8px;
}

.day {
  position: relative;
  min-height: 112px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  text-align: left;
  cursor: pointer;
}

.day:hover,
.day.selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(15, 118, 110, .12);
}

.day.has-slots {
  border-color: #2563eb;
  background: #eff6ff;
  color: #17366f;
}

.day.has-slots:hover,
.day.has-slots.selected {
  border-color: #1d4ed8;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .2);
}

.day.outside {
  color: #9aa3b2;
  background: #f9fafc;
}

.day.outside.has-slots {
  color: #31538c;
  background: #f3f7ff;
}

.day-number {
  font-weight: 800;
}

.day-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  margin-top: 28px;
  border-radius: 999px;
  background: #2563eb;
  color: #fff;
  font-size: .8rem;
  font-weight: 800;
}

.slot-list {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.slot-card,
.admin-slot {
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.slot-card button {
  justify-self: start;
}

.slot-meta {
  color: var(--muted);
  font-size: .92rem;
}

.empty {
  padding: 22px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

.hidden {
  display: none;
}

.booking-form {
  display: grid;
  gap: 16px;
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

legend {
  padding: 0 6px;
  font-weight: 800;
}

.legend-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: .86rem;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 11px;
  color: var(--ink);
  background: #fff;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(15, 118, 110, .22);
  border-color: var(--primary);
}

.span-2 {
  grid-column: 1 / -1;
}

.observer-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.observer-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr 42px;
  gap: 8px;
}

.primary-button,
.secondary-button,
.danger-button {
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0 14px;
  font-weight: 800;
  cursor: pointer;
}

.primary-button {
  background: var(--primary);
  color: #fff;
}

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

.secondary-button {
  background: #ecfdf5;
  color: var(--primary-dark);
  border-color: rgba(15, 118, 110, .2);
}

.danger-button {
  background: #fff5f5;
  color: var(--danger);
  border-color: rgba(180, 35, 24, .24);
}

.message {
  min-height: 22px;
  color: var(--muted);
  font-weight: 700;
}

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

.message.success {
  color: var(--primary-dark);
}

.admin-layout {
  display: grid;
  grid-template-columns: minmax(320px, 430px) 1fr;
  gap: 24px;
  padding: 24px clamp(18px, 4vw, 48px) 48px;
}

.admin-layout.wide {
  grid-template-columns: minmax(300px, 380px) minmax(420px, 1fr) minmax(340px, 460px);
}

.admin-form-panel {
  padding: 18px;
  align-self: start;
}

.admin-month {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.admin-slot-list {
  display: grid;
  gap: 18px;
}

.slot-group {
  display: grid;
  gap: 10px;
}

.slot-group > h3 {
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.empty.compact {
  padding: 14px;
}

.admin-slot {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.admin-slot.booked {
  border-color: rgba(180, 83, 9, .35);
  background: #fffaf3;
}

.admin-slot.cancelled {
  border-color: rgba(104, 115, 134, .35);
  background: #f8fafc;
}

.booking-details {
  display: grid;
  gap: 4px;
  margin-top: 8px;
  color: var(--ink);
  font-size: .9rem;
}

.slot-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.settings-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}

.user-form {
  margin-bottom: 14px;
}

.user-list {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.user-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.checkbox-label {
  grid-template-columns: auto 1fr;
  align-items: center;
  align-content: center;
}

.checkbox-label input {
  width: auto;
}

.login-page {
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-shell {
  width: min(100%, 420px);
}

.login-form {
  display: grid;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

@media (max-width: 900px) {
  .layout,
  .admin-layout {
    grid-template-columns: 1fr;
  }

  .calendar-grid {
    gap: 6px;
  }

  .day {
    min-height: 82px;
    padding: 8px;
  }
}

@media (max-width: 620px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .top-actions {
    justify-content: flex-start;
  }

  .calendar-panel,
  .booking-panel {
    padding: 12px;
  }

  .day {
    min-height: 64px;
  }

  .day-count {
    margin-top: 12px;
  }

  .field-grid,
  .observer-row {
    grid-template-columns: 1fr;
  }

  .observer-row .icon-button {
    width: 100%;
  }
}