:root {
  --green-900: #003f2d;
  --green-800: #005f3f;
  --green-700: #007a4d;
  --green-100: #e7f6ef;
  --yellow-500: #ffd400;
  --yellow-100: #fff7c7;
  --white: #ffffff;
  --ink: #1e2b25;
  --muted: #66756e;
  --line: #dce7e1;
  --danger: #c0392b;
  --shadow: 0 18px 50px rgba(0, 63, 45, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #f7fbf8 0%, #ffffff 45%, #f1f8f4 100%);
}

button,
input {
  font: inherit;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px clamp(16px, 4vw, 44px);
  background: var(--green-800);
  color: var(--white);
  border-bottom: 6px solid var(--yellow-500);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  background: var(--yellow-500);
  color: var(--green-900);
  font-weight: 900;
  font-size: 28px;
  border-radius: 8px;
}

.brand h1,
.brand p,
.calendar-controls h2,
.calendar-controls p,
.booking-panel h2,
.dash-block h2 {
  margin: 0;
}

.brand h1 {
  font-size: clamp(20px, 2.8vw, 34px);
  line-height: 1.1;
}

.brand p,
.room-status small,
.calendar-controls p {
  color: rgba(255, 255, 255, 0.78);
}

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

.room-status {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 230px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
}

.share-button {
  min-height: 42px;
  padding: 0 14px;
  border: 0;
  border-radius: 8px;
  background: var(--yellow-500);
  color: var(--green-900);
  cursor: pointer;
  font-weight: 800;
  white-space: nowrap;
}

.sync-panel {
  display: none;
  grid-template-columns: minmax(220px, 0.8fr) minmax(280px, 1.2fr);
  gap: 18px;
  align-items: end;
  margin-bottom: 18px;
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 6px solid var(--yellow-500);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.sync-panel.open {
  display: grid;
}

.sync-panel h2,
.sync-panel p {
  margin: 0;
}

.sync-panel h2 {
  color: var(--green-900);
  font-size: 18px;
}

.sync-panel p {
  margin-top: 6px;
  color: var(--muted);
}

.sync-panel form {
  grid-template-columns: 1fr 1fr auto;
  align-items: end;
  margin: 0;
}

.status-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #48d97a;
  box-shadow: 0 0 0 6px rgba(72, 217, 122, 0.18);
}

.room-status.busy .status-dot {
  background: var(--yellow-500);
  box-shadow: 0 0 0 6px rgba(255, 212, 0, 0.22);
}

.room-status.next .status-dot {
  background: #ffffff;
  box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.2);
}

.app-shell {
  width: min(1480px, 100%);
  margin: 0 auto;
  padding: 22px clamp(14px, 3vw, 34px) 34px;
}

.controls-band {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.calendar-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.calendar-controls h2 {
  font-size: 24px;
  color: var(--green-900);
}

.calendar-controls p {
  color: var(--muted);
}

.icon-button,
.segmented button,
.primary-button,
.delete-button {
  border: 0;
  cursor: pointer;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--green-100);
  color: var(--green-900);
  font-size: 28px;
  line-height: 1;
}

.segmented {
  display: inline-flex;
  padding: 4px;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 6px 18px rgba(0, 63, 45, 0.07);
}

.segmented button {
  min-width: 86px;
  padding: 9px 14px;
  border-radius: 6px;
  background: transparent;
  color: var(--green-900);
  font-weight: 700;
}

.segmented button.active {
  background: var(--yellow-500);
}

.workspace {
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr) 320px;
  gap: 18px;
  align-items: start;
}

.booking-panel,
.dashboard,
.calendar-surface {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.booking-panel,
.dashboard {
  padding: 18px;
}

.booking-panel h2,
.dash-block h2 {
  color: var(--green-900);
  font-size: 18px;
}

form,
label {
  display: grid;
  gap: 8px;
}

form {
  margin-top: 16px;
  gap: 14px;
}

label {
  color: var(--green-900);
  font-weight: 700;
  font-size: 13px;
}

input {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fbfffd;
  color: var(--ink);
}

input:focus {
  outline: 3px solid rgba(255, 212, 0, 0.38);
  border-color: var(--green-700);
}

.time-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.code-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.secondary-button {
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--green-700);
  border-radius: 7px;
  background: var(--white);
  color: var(--green-900);
  cursor: pointer;
  font-weight: 800;
}

.form-message {
  min-height: 20px;
  margin: 0;
  color: var(--danger);
  font-size: 13px;
  font-weight: 700;
}

.form-message.success {
  color: var(--green-700);
}

.primary-button {
  min-height: 44px;
  border-radius: 8px;
  background: var(--green-800);
  color: var(--white);
  font-weight: 800;
}

.primary-button:hover {
  background: var(--green-900);
}

.calendar-surface {
  overflow: hidden;
}

.calendar {
  min-height: 640px;
}

.week-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(104px, 1fr));
  min-width: 760px;
}

.month-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(94px, 1fr));
  min-width: 700px;
}

.day-column,
.month-day {
  min-height: 640px;
  border-right: 1px solid var(--line);
  background: #ffffff;
}

.day-column:last-child,
.month-day:nth-child(7n) {
  border-right: 0;
}

.day-header {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 12px;
  background: var(--green-100);
  border-bottom: 1px solid var(--line);
}

.day-header strong {
  display: block;
  color: var(--green-900);
  font-size: 14px;
}

.day-header span {
  color: var(--muted);
  font-size: 12px;
}

.day-body {
  display: grid;
  gap: 9px;
  padding: 12px;
}

.booking-card {
  display: grid;
  gap: 5px;
  padding: 10px;
  border-left: 5px solid var(--yellow-500);
  border-radius: 8px;
  background: var(--green-100);
}

.booking-card strong {
  font-size: 13px;
  color: var(--green-900);
}

.booking-card span,
.booking-card small {
  color: var(--muted);
  font-size: 12px;
}

.delete-button {
  justify-self: start;
  padding: 6px 8px;
  border-radius: 6px;
  background: #fff;
  color: var(--danger);
  font-size: 12px;
  font-weight: 700;
}

.month-day {
  min-height: 124px;
}

.month-day.outside {
  background: #f7faf8;
  color: #93a09a;
}

.month-day .day-header {
  position: static;
  padding: 8px 10px;
}

.month-day .day-body {
  padding: 8px;
}

.month-day .booking-card {
  padding: 8px;
}

.dashboard {
  display: grid;
  gap: 18px;
}

.metric-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.metric-strip article {
  display: grid;
  gap: 4px;
  padding: 14px;
  background: var(--yellow-100);
  border-radius: 8px;
}

.metric-strip span {
  color: var(--green-900);
  font-size: 12px;
  font-weight: 700;
}

.metric-strip strong {
  color: var(--green-900);
  font-size: 27px;
}

.dash-block {
  display: grid;
  gap: 12px;
}

.list {
  display: grid;
  gap: 10px;
}

.empty {
  padding: 14px;
  color: var(--muted);
  background: #f8fbf9;
  border: 1px dashed var(--line);
  border-radius: 8px;
  font-size: 13px;
}

.compact .booking-card {
  background: #f8fbf9;
  border-left-color: var(--green-700);
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: 300px minmax(0, 1fr);
  }

  .dashboard {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .topbar,
  .controls-band {
    align-items: stretch;
    flex-direction: column;
  }

  .top-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .room-status {
    width: 100%;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .sync-panel,
  .sync-panel form {
    grid-template-columns: 1fr;
  }

  .calendar-surface {
    overflow-x: auto;
  }

  .booking-panel,
  .dashboard {
    padding: 16px;
  }

  .segmented {
    width: 100%;
  }

  .segmented button {
    flex: 1;
  }
}

@media (max-width: 520px) {
  .brand {
    align-items: flex-start;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
    font-size: 24px;
  }

  .time-grid,
  .code-row,
  .metric-strip {
    grid-template-columns: 1fr;
  }

  .calendar {
    min-height: 540px;
  }
}