:root {
  color-scheme: light;
  --bg: #f5f7fa;
  --bg-soft: #fbfcfe;
  --panel: #ffffff;
  --text: #172033;
  --muted: #667085;
  --border: #d8dee8;
  --border-strong: #b9c4d4;
  --primary: #1b5e7a;
  --primary-hover: #164d64;
  --primary-soft: #e9f5f8;
  --error-bg: #fff1f0;
  --error-text: #9f1c16;
  --success-bg: #ecfdf3;
  --success-text: #087443;
  --warning-bg: #fff7df;
  --warning-text: #7a4d00;
  --shadow: 0 16px 38px rgba(20, 32, 50, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
}

a {
  color: var(--primary);
}

a:hover {
  color: var(--primary-hover);
}

:focus-visible {
  outline: 3px solid rgba(27, 94, 122, 0.28);
  outline-offset: 2px;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-panel {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.auth-panel h1 {
  margin: 0 0 20px;
  font-size: 24px;
  line-height: 1.2;
}

.auth-panel label {
  display: block;
  margin: 14px 0 6px;
  font-weight: 700;
}

.auth-panel input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 9px 11px;
  font: inherit;
}

.auth-panel button {
  width: 100%;
  min-height: 42px;
  margin-top: 20px;
  border: 0;
  border-radius: 6px;
  background: var(--primary);
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

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

.alert {
  margin: 0 0 16px;
  padding: 10px 12px;
  border-radius: 6px;
  border: 1px solid transparent;
}

.alert-error {
  background: var(--error-bg);
  color: var(--error-text);
  border-color: #ffd4d0;
}

.alert-success {
  background: var(--success-bg);
  color: var(--success-text);
  border-color: #abefc6;
}

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

.admin-header {
  min-height: 58px;
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 0 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.admin-nav {
  display: flex;
  gap: 4px;
  min-width: 0;
}

.admin-nav a {
  color: var(--muted);
  border-radius: 6px;
  padding: 7px 10px;
  text-decoration: none;
  white-space: nowrap;
}

.admin-nav a:hover,
.admin-nav a.active {
  background: var(--primary-soft);
  color: var(--text);
}

.logout-form {
  margin: 0;
}

.logout-form button,
.button-link {
  min-height: 36px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  padding: 7px 12px;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}

.logout-form button:hover,
.button-link:hover {
  border-color: var(--primary);
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.admin-main {
  width: min(1180px, calc(100% - 32px));
  margin: 28px auto 48px;
}

.page-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.page-heading h1 {
  margin: 0 0 4px;
  font-size: 28px;
}

.page-heading p {
  margin: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  min-width: 0;
}

.stat-card span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.stat-card strong {
  display: block;
  margin-top: 8px;
  font-size: 30px;
  line-height: 1;
}

.stat-new {
  border-color: #9fd0df;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(20, 32, 50, 0.04);
}

.filter-panel {
  margin-bottom: 18px;
  padding: 16px;
}

.filters-form {
  display: grid;
  grid-template-columns: minmax(220px, 1.6fr) repeat(4, minmax(120px, 1fr)) auto auto;
  gap: 12px;
  align-items: end;
}

.filters-form label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.filters-form input,
.filters-form select {
  min-height: 38px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 9px;
  color: var(--text);
  font: inherit;
}

.filters-form input:focus,
.filters-form select:focus,
.auth-panel input:focus,
.reply-form textarea:focus {
  border-color: var(--primary);
}

.filters-form button,
.inline-form button,
.action-stack button,
.reply-form button {
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  background: var(--primary);
  color: white;
  padding: 7px 12px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.filters-form button:hover,
.inline-form button:hover,
.action-stack button:hover,
.reply-form button:hover {
  background: var(--primary-hover);
}

.danger-button {
  background: #b42318 !important;
}

.danger-button:hover {
  background: #8a1b12 !important;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.panel-header h2 {
  margin: 0;
  font-size: 18px;
}

.table-wrap {
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th,
.data-table td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  color: var(--muted);
  font-weight: 700;
  white-space: nowrap;
  background: var(--panel);
}

.row-new {
  background: #f0f9fc;
  box-shadow: inset 3px 0 0 #45a7c3;
}

.data-table tbody tr:hover {
  background: var(--bg-soft);
}

.truncate {
  max-width: 360px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status-pill {
  display: inline-block;
  min-width: 64px;
  border-radius: 999px;
  padding: 3px 8px;
  background: #eef2f6;
  color: var(--text);
  text-align: center;
  font-size: 12px;
  white-space: nowrap;
}

.status-new {
  background: #dff3fa;
  color: #15546a;
}

.status-read {
  background: #eef2f6;
  color: #475467;
}

.status-answered {
  background: var(--success-bg);
  color: var(--success-text);
}

.status-failed {
  background: var(--error-bg);
  color: var(--error-text);
}

.table-actions {
  text-align: right;
  white-space: nowrap;
}

.table-actions a {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 9px;
  text-decoration: none;
}

.table-actions a:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.empty-state {
  margin: 0;
  padding: 22px 16px;
  color: var(--muted);
}

.pagination {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
}

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

.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
}

.detail-panel {
  padding-bottom: 16px;
}

.detail-list {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 8px 14px;
  margin: 16px;
}

.detail-list dt {
  color: var(--muted);
  font-weight: 700;
}

.detail-list dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.message-body {
  margin: 16px;
  padding: 14px;
  min-height: 120px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-soft);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.inline-form {
  margin: 16px;
}

.users-filters {
  grid-template-columns: minmax(240px, 1fr) minmax(140px, 180px) auto auto;
}

.user-layout {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 18px;
}

.user-detail-list {
  grid-template-columns: 110px minmax(0, 1fr);
}

.action-stack {
  display: grid;
  gap: 10px;
  margin: 16px;
}

.action-stack form {
  margin: 0;
}

.action-stack button {
  width: 100%;
}

.conversation-panel {
  min-width: 0;
}

.chat-list {
  display: grid;
  gap: 12px;
  padding: 16px;
  max-height: min(64vh, 680px);
  overflow-y: auto;
  scroll-behavior: smooth;
}

.chat-message {
  max-width: min(76%, 680px);
}

.chat-incoming {
  justify-self: start;
}

.chat-outgoing {
  justify-self: end;
}

.chat-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
}

.chat-outgoing .chat-meta {
  justify-content: flex-end;
}

.chat-bubble {
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-soft);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.chat-outgoing .chat-bubble {
  background: var(--primary-soft);
  border-color: #c8e4ec;
}

.chat-new .chat-bubble {
  border-color: #77bdd1;
  box-shadow: 0 0 0 2px rgba(69, 167, 195, 0.12);
}

.chat-error {
  margin: 6px 0 0;
  color: var(--error-text);
  font-size: 13px;
}

.reply-form {
  display: grid;
  gap: 8px;
  padding: 16px;
  border-top: 1px solid var(--border);
}

.reply-form label {
  color: var(--muted);
  font-weight: 700;
}

.reply-form textarea {
  width: 100%;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  font: inherit;
}

.reply-form button {
  justify-self: end;
  min-width: 120px;
}

.reply-form button:disabled,
.filters-form button:disabled,
.inline-form button:disabled,
.action-stack button:disabled,
.reply-form textarea:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.is-submitting button[type="submit"] {
  opacity: 0.7;
  pointer-events: none;
}

@media (max-width: 760px) {
  .admin-header {
    grid-template-columns: 1fr auto;
    gap: 12px;
    padding: 12px 16px;
  }

  .admin-nav {
    grid-column: 1 / -1;
    order: 3;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .page-heading {
    display: block;
  }

  .button-link {
    display: inline-flex;
    align-items: center;
    margin-top: 12px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .filters-form,
  .detail-grid,
  .user-layout {
    grid-template-columns: 1fr;
  }

  .chat-message {
    max-width: 100%;
  }

  .admin-main {
    width: min(100% - 20px, 1180px);
    margin-top: 18px;
  }

  .data-table th,
  .data-table td {
    padding: 10px;
  }

  .detail-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}