:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #111827;
  --muted: #667085;
  --line: #d7dee8;
  --line-strong: #c5ceda;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #b42318;
  --danger-line: #f2b8b5;
  --success: #166534;
  --success-line: #bbf7d0;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  width: min(1120px, 100%);
  height: 58px;
  margin: 0 auto;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-size: 1.15rem;
  font-weight: 800;
}

.topnav {
  display: flex;
  gap: 10px;
  align-items: center;
}

.topnav form {
  margin: 0;
}

.page {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 28px 18px;
}

.toolbar,
.settings-head,
.panel-title {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.toolbar {
  margin-bottom: 18px;
}

.search {
  display: flex;
  gap: 10px;
  flex: 1;
}

.split,
.settings-grid {
  display: grid;
  gap: 18px;
  align-items: start;
}

.split {
  grid-template-columns: minmax(280px, 380px) 1fr;
}

.settings-grid {
  grid-template-columns: minmax(280px, 380px) 1fr;
}

.panel,
.box-row,
.login-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel {
  padding: 16px;
}

.stack {
  display: grid;
  gap: 14px;
}

h1 {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.25;
}

p {
  margin: 0;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

input,
textarea,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text);
  font: inherit;
  background: #ffffff;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid rgba(37, 99, 235, 0.16);
  border-color: var(--primary);
}

textarea {
  resize: vertical;
}

button,
.primary,
.secondary,
.danger,
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 6px;
  border: 1px solid transparent;
  padding: 0 14px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}

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

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

.secondary,
.icon-button {
  background: #ffffff;
  border-color: var(--line);
  color: var(--text);
}

.secondary:hover,
.icon-button:hover {
  border-color: var(--line-strong);
  background: #f8fafc;
}

.danger {
  background: #ffffff;
  border-color: var(--danger-line);
  color: var(--danger);
}

.danger:hover {
  background: #fff7f7;
}

.compact {
  min-height: 36px;
  padding: 0 12px;
}

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

.box-row {
  display: grid;
  gap: 6px;
  padding: 14px;
}

.box-row:hover {
  border-color: var(--line-strong);
}

.box-row span,
.box-row small,
.muted,
.empty,
.panel-title span {
  color: var(--muted);
}

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

.box-header h1 {
  font-size: 2rem;
}

.qr {
  width: 150px;
  height: 150px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
}

.url {
  overflow-wrap: anywhere;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f8fafc;
  color: var(--muted);
}

.login-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.login-panel {
  width: min(390px, 100%);
  padding: 20px;
}

.error {
  margin: 0;
  color: var(--danger);
  font-weight: 700;
}

.notice {
  margin-bottom: 14px;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.success {
  color: var(--success);
  border-color: var(--success-line);
}

.settings-head {
  margin-bottom: 18px;
}

.settings-head div {
  display: grid;
  gap: 6px;
}

.users-panel {
  margin-top: 18px;
}

.users-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.user-row {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) 230px minmax(260px, 1.2fr) 110px;
  gap: 10px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

.user-main {
  display: grid;
  gap: 4px;
}

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

.inline-form {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 0;
}

.inline-form input,
.inline-form select {
  min-width: 0;
}

.inline-form .danger {
  width: 100%;
}

.preline {
  white-space: pre-line;
}

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

  .user-row {
    grid-template-columns: 1fr;
  }

  .inline-form {
    align-items: stretch;
  }
}

@media (max-width: 640px) {
  .topbar-inner,
  .page {
    padding-left: 12px;
    padding-right: 12px;
  }

  .toolbar,
  .search,
  .box-header,
  .settings-head {
    align-items: stretch;
    flex-direction: column;
  }

  .topnav {
    gap: 6px;
  }

  .inline-form {
    flex-direction: column;
  }

  .qr {
    width: 132px;
    height: 132px;
  }
}