:root {
  --ink: #172126;
  --muted: #64727a;
  --line: #dbe4e7;
  --bg: #f5f7f8;
  --card: #ffffff;
  --brand: #16705b;
  --brand-dark: #10272b;
  --accent: #d97706;
  --ok: #15803d;
  --warn: #a16207;
  --danger: #b42318;
  font-family: "Microsoft JhengHei", "PingFang TC", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
}

body.auth-locked {
  display: block;
}

body.auth-locked .side,
body.auth-locked .main {
  display: none;
}

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

button {
  min-height: 38px;
  border: 0;
  border-radius: 7px;
  padding: 7px 11px;
  background: var(--brand);
  color: white;
  font-weight: 800;
  cursor: pointer;
}

button.secondary {
  background: #e8f3ef;
  color: var(--brand);
  border: 1px solid #bad8d0;
}

button.ghost {
  background: white;
  color: var(--ink);
  border: 1px solid var(--line);
}

button.danger {
  background: #fff1f0;
  color: var(--danger);
  border: 1px solid #efbbb5;
}

button:disabled,
input:disabled,
select:disabled {
  opacity: 0.58;
  cursor: not-allowed;
}

input,
select,
textarea {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: white;
  padding: 7px 9px;
}

textarea {
  min-height: 82px;
  resize: vertical;
}

label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: #34434a;
  font-weight: 800;
}

.side {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  background: var(--brand-dark);
  color: white;
  padding: 16px 11px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 7px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  margin-bottom: 10px;
}

.brand span {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--accent);
  color: var(--brand-dark);
  font-weight: 900;
}

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

.brand small {
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.68);
}

#nav {
  display: grid;
  gap: 5px;
}

.nav-btn {
  width: 100%;
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  text-align: left;
  color: rgba(255, 255, 255, 0.82);
  background: transparent;
}

.nav-btn.active,
.nav-btn:hover {
  color: white;
  background: rgba(255, 255, 255, 0.12);
}

.main {
  min-width: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
}

.topbar h1 {
  margin: 0 0 4px;
  font-size: 24px;
}

.topbar p {
  margin: 0;
  color: var(--muted);
}

.role-box {
  min-width: 180px;
  display: grid;
  gap: 8px;
}

.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 18px;
  background:
    linear-gradient(rgba(16, 39, 43, 0.82), rgba(22, 112, 91, 0.7)),
    url("https://images.unsplash.com/photo-1540555700478-4be289fbecef?auto=format&fit=crop&w=1200&q=80") center/cover;
}

.login-card {
  width: min(100%, 390px);
  display: grid;
  gap: 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.96);
  padding: 26px;
  box-shadow: 0 18px 40px rgba(16, 39, 43, 0.22);
}

.app-logo {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--accent);
  color: var(--brand-dark);
  font-weight: 900;
}

.login-card h1 {
  margin: 4px 0 0;
}

.login-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.form-stack {
  display: grid;
  gap: 12px;
}

.auth-error {
  min-height: 20px;
  color: var(--danger);
  font-size: 13px;
  font-weight: 800;
}

.privacy {
  margin: 18px 22px 0;
  display: grid;
  gap: 4px;
  border: 1px solid #b7d7cf;
  border-left: 5px solid var(--brand);
  border-radius: 8px;
  background: #eef8f4;
  padding: 12px 14px;
}

.privacy span {
  color: #496760;
  line-height: 1.6;
}

.content {
  padding: 18px 22px 42px;
  display: grid;
  gap: 16px;
}

.grid {
  display: grid;
  gap: 12px;
}

.metrics {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.two {
  grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.8fr);
}

.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel,
.metric,
.task-card,
.room,
.setting-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
}

.panel {
  overflow: hidden;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 13px 15px;
  border-bottom: 1px solid var(--line);
}

.panel-head h2 {
  margin: 0;
  font-size: 17px;
}

.panel-body {
  padding: 15px;
}

.metric {
  min-height: 112px;
  display: grid;
  align-content: space-between;
  border-left: 5px solid var(--brand);
  padding: 13px;
}

.metric span,
.mini {
  color: var(--muted);
  font-size: 13px;
}

.metric strong {
  font-size: 25px;
}

.metric small {
  color: var(--ok);
}

.task-list,
.room-grid,
.settings-grid,
.log-list {
  display: grid;
  gap: 10px;
}

.task-card {
  display: grid;
  gap: 9px;
  padding: 12px;
}

.task-top,
.task-actions,
.line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.task-actions {
  flex-wrap: wrap;
}

.status {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border-radius: 999px;
  padding: 3px 9px;
  background: #edf3f0;
  color: #255b4f;
  font-size: 12px;
  font-weight: 900;
  white-space: nowrap;
}

.status.ok {
  background: #dcfce7;
  color: #166534;
}

.status.warn {
  background: #fef3c7;
  color: #92400e;
}

.status.danger {
  background: #fee2e2;
  color: #991b1b;
}

.room-grid {
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
}

.room {
  min-height: 90px;
  display: grid;
  gap: 5px;
  padding: 11px;
}

.room.busy {
  background: #fff7ed;
  border-color: #f0bf80;
}

.room.clean {
  background: #effaf5;
  border-color: #a7d5bf;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 11px;
}

.form-grid .full {
  grid-column: 1 / -1;
}

.catalog {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
}

.catalog button {
  min-height: 70px;
  background: white;
  color: var(--ink);
  border: 1px solid var(--line);
  text-align: left;
}

.receipt {
  display: grid;
  gap: 8px;
  margin: 12px 0;
}

.receipt-line {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
}

.total {
  display: flex;
  justify-content: space-between;
  font-size: 22px;
  font-weight: 900;
  margin: 12px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

th,
td {
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: 10px;
  vertical-align: top;
}

th {
  font-size: 13px;
  background: #f8faf9;
}

.table-wrap {
  overflow: auto;
}

.setting-card {
  display: grid;
  gap: 9px;
  padding: 12px;
}

.log-list .line {
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
}

.qr-card {
  display: grid;
  justify-items: center;
  gap: 12px;
  text-align: center;
}

.qr-card img {
  width: min(100%, 260px);
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  padding: 10px;
}

.qr-card code {
  display: block;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #f8faf9;
  color: #255b4f;
  padding: 9px;
  overflow-wrap: anywhere;
}

.teacher-row {
  display: grid;
  grid-template-columns: 58px 1fr auto;
  align-items: center;
  gap: 11px;
}

.teacher-photo {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8faf9;
  color: var(--muted);
  font-size: 13px;
  overflow: hidden;
}

.teacher-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (max-width: 1050px) {
  body {
    grid-template-columns: 1fr;
  }

  .side {
    position: static;
    height: auto;
  }

  #nav {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }

  .metrics,
  .two,
  .three {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .topbar,
  .panel-head,
  .task-top,
  .line,
  .teacher-row {
    align-items: stretch;
    flex-direction: column;
  }

  .content,
  .topbar {
    padding-left: 14px;
    padding-right: 14px;
  }

  .privacy {
    margin-left: 14px;
    margin-right: 14px;
  }

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