:root {
  --font-stack: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-lg: 0 28px 90px rgba(15, 23, 42, 0.28);
  --shadow-md: 0 18px 50px rgba(15, 23, 42, 0.18);
}

body[data-theme="dark"] {
  color-scheme: dark;
  --bg: #06111f;
  --bg-soft: #0b1728;
  --surface: rgba(8, 18, 34, 0.86);
  --surface-soft: rgba(14, 27, 48, 0.88);
  --surface-strong: rgba(16, 31, 55, 0.96);
  --sidebar: linear-gradient(180deg, rgba(7, 16, 29, 0.98), rgba(5, 11, 22, 0.98));
  --sidebar-soft: rgba(255, 255, 255, 0.03);
  --line: rgba(148, 163, 184, 0.14);
  --line-strong: rgba(96, 165, 250, 0.28);
  --text: #edf3fd;
  --muted: #91a3c0;
  --primary: #4f8df7;
  --primary-strong: #2563eb;
  --accent: #22d3ee;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #f87171;
  --hero-text: #dbeafe;
}

body[data-theme="light"] {
  color-scheme: light;
  --bg: #eef4fb;
  --bg-soft: #ffffff;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-soft: rgba(247, 250, 255, 0.96);
  --surface-strong: rgba(255, 255, 255, 1);
  --sidebar: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 249, 255, 0.98));
  --sidebar-soft: rgba(37, 99, 235, 0.05);
  --line: rgba(148, 163, 184, 0.22);
  --line-strong: rgba(59, 130, 246, 0.3);
  --text: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --accent: #0891b2;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --hero-text: #e0edff;
  --shadow-lg: 0 26px 80px rgba(15, 23, 42, 0.1);
  --shadow-md: 0 16px 40px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-stack);
  font-size: 14px;
  background:
    radial-gradient(circle at top left, rgba(79, 141, 247, 0.18), transparent 26%),
    radial-gradient(circle at right center, rgba(34, 211, 238, 0.12), transparent 22%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  color: var(--text);
}

body {
  min-height: 100vh;
}

body.modal-open {
  overflow: hidden;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.eyebrow,
.subtle {
  margin: 0;
  color: var(--muted);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 11px;
}

.btn,
.segment,
.nav-group-toggle,
.nav-item,
.tree-chip {
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.btn:hover,
.segment:hover,
.nav-group-toggle:hover,
.nav-item:hover,
.tree-chip:hover {
  transform: translateY(-1px);
}

.btn {
  min-height: 40px;
  padding: 0 14px;
  font-size: 13px;
}

.btn.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.24);
}

.btn.secondary {
  color: var(--primary);
  background: rgba(79, 141, 247, 0.1);
  border-color: var(--line-strong);
}

.btn.ghost,
.segment,
.nav-group-toggle,
.nav-item,
.tree-chip {
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
  border-color: var(--line);
}

.segment.is-active,
.nav-item.is-active,
.tree-chip.is-active {
  color: var(--primary);
  border-color: var(--line-strong);
  background: rgba(79, 141, 247, 0.12);
}

.input,
.select {
  width: 100%;
  min-height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 0 14px;
}

.input:focus,
.select:focus,
.btn:focus-visible,
.segment:focus-visible,
.nav-group-toggle:focus-visible,
.nav-item:focus-visible {
  outline: 2px solid rgba(79, 141, 247, 0.75);
  outline-offset: 2px;
}

.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
}

.login-shell {
  width: min(1380px, 100%);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(420px, 0.85fr);
  gap: 24px;
}

.login-showcase,
.login-card,
.panel,
.player-card,
.shell-topbar,
.sidebar,
.showcase-card,
.hero-panel,
.summary-card,
.workflow-card,
.row-card,
.alarm-card,
.tts-card,
.settings-section,
.role-card,
.permission-row,
.workorder-column,
.player-links a,
.info-row,
.latest-alarm-card,
.runtime-card,
.readonly-banner,
.empty-card,
.tree-node {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
}

.login-showcase {
  padding: 36px;
  display: grid;
  gap: 28px;
  align-content: space-between;
  background:
    radial-gradient(circle at top right, rgba(79, 141, 247, 0.28), transparent 34%),
    radial-gradient(circle at bottom left, rgba(34, 211, 238, 0.14), transparent 28%),
    linear-gradient(145deg, rgba(7, 18, 34, 0.94), rgba(10, 23, 42, 0.9));
}

.brand-lockup,
.sidebar-brand {
  display: flex;
  gap: 16px;
  align-items: center;
}

.brand-dot,
.sidebar-logo,
.user-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
}

.sidebar-logo,
.user-avatar {
  width: 46px;
  height: 46px;
}

.login-showcase h1,
.login-card h2,
.sidebar-brand h1,
.hero-copy h2,
.page-header h2,
.panel-header h3 {
  margin: 4px 0 0;
}

.login-showcase h1,
.login-card h2,
.sidebar-brand h1,
.hero-copy h2,
.page-header h2 {
  font-size: 24px;
}

.panel-header h3 {
  font-size: 18px;
}

.showcase-copy {
  margin: 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.7;
  color: var(--hero-text);
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.showcase-card,
.login-card {
  padding: 24px;
}

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

.login-form,
.settings-form,
.settings-section,
.tts-panel {
  display: grid;
  gap: 14px;
}

.login-form label,
.settings-section label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

.login-options,
.checkbox,
.topbar-left,
.topbar-actions,
.panel-actions,
.quick-actions,
.player-actions,
.tts-row,
.player-badges,
.workflow-strip,
.settings-footer,
.segmented,
.alarm-toolbar,
.permission-tags,
.role-tags,
.pager {
  display: flex;
  gap: 12px;
}

.checkbox {
  align-items: center;
  flex-wrap: wrap;
}

.checkbox input {
  width: 16px;
  height: 16px;
}

.login-status {
  margin: 0;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(248, 113, 113, 0.28);
  background: rgba(248, 113, 113, 0.08);
  color: #fca5a5;
  padding: 12px 14px;
  white-space: pre-line;
}

.login-actions {
  display: flex;
  justify-content: flex-end;
}

.app-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 20px;
  padding: 20px;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 20px 16px;
  background: var(--sidebar);
}

.sidebar-context {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--sidebar-soft);
}

.sidebar-nav,
.nav-group,
.nav-items,
.page-section,
.list-table,
.alarm-list,
.tts-profiles,
.info-list,
.auth-summary,
.permission-matrix,
.device-tree {
  display: grid;
  gap: 10px;
}

.nav-group-toggle,
.nav-item {
  padding: 10px 14px;
  text-align: left;
}

.nav-group-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.nav-group-toggle-label {
  min-width: 0;
}

.nav-group-toggle-icon {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.05);
  transition: transform 180ms ease, color 180ms ease, background 180ms ease;
}

.nav-group-toggle-icon svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-group-toggle.is-open .nav-group-toggle-icon {
  color: var(--primary);
  background: rgba(79, 141, 247, 0.14);
  transform: rotate(90deg);
}

.nav-item {
  min-height: 52px;
  display: grid;
  gap: 4px;
}

.nav-item small {
  color: var(--muted);
  font-size: 12px;
}

.shell-main {
  min-width: 0;
  display: grid;
  gap: 16px;
}

.shell-topbar {
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.topbar-actions {
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
}

.icon-btn {
  width: 38px;
  min-width: 38px;
  padding: 0;
  border-radius: 12px;
}

.icon-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.breadcrumb-stack {
  display: grid;
  gap: 6px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-weight: 600;
}

.breadcrumb i {
  color: var(--muted);
  font-style: normal;
}

.sidebar-toggle {
  display: none;
}

.user-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 10px 7px 7px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

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

.page-host {
  min-width: 0;
}

.content-page {
  display: none;
}

.content-page.is-active {
  display: block;
}

.page-header,
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.summary-strip {
  display: grid;
  gap: 16px;
}

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

.panel,
.workorder-column {
  padding: 18px;
  display: grid;
  gap: 8px;
}

.runtime-card,
.summary-card,
.empty-card {
  padding: 16px 18px;
}

.runtime-card strong,
.summary-card strong,
.workflow-card strong {
  display: block;
  margin-top: 0;
  font-size: 20px;
}

.runtime-icon {
  min-width: 36px;
  height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 11px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.runtime-card.is-offline .runtime-icon {
  background: linear-gradient(135deg, #ef4444, #f59e0b);
}

.latest-panel {
  min-height: calc(100vh - 108px);
  max-height: calc(100vh - 108px);
  overflow: hidden;
  align-content: start;
}

.latest-alarm-feed {
  display: grid;
  gap: 6px;
  overflow: auto;
  min-height: 0;
  padding-right: 4px;
}

.latest-alarm-card h3,
.row-title,
.tts-card h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.latest-alarm-card {
  overflow: hidden;
}

.latest-alarm-thumb,
.alarm-thumb,
.alarm-detail-photo {
  position: relative;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.preview-trigger {
  padding: 0;
}

.latest-alarm-thumb,
.alarm-thumb {
  display: block;
  aspect-ratio: 16 / 9;
}

.latest-alarm-thumb img,
.alarm-thumb img,
.alarm-detail-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.latest-alarm-thumb.is-empty,
.alarm-thumb.is-empty {
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 12px;
}

.latest-alarm-cell-thumb .latest-alarm-thumb {
  width: 100%;
  height: 100%;
  min-height: 100%;
}

.image-preview-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: 24px;
}

.image-preview-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.72);
  backdrop-filter: blur(8px);
}

.image-preview-dialog {
  position: relative;
  z-index: 1;
  width: min(1180px, 100%);
  max-height: calc(100vh - 48px);
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: 24px;
  background: color-mix(in srgb, var(--surface-strong) 90%, transparent);
  box-shadow: var(--shadow-lg);
}

.image-preview-header,
.image-preview-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.image-preview-actions .btn,
.image-preview-actions a.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.image-preview-stage {
  min-height: 0;
  max-height: calc(100vh - 180px);
  overflow: auto;
  border-radius: 18px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at top right, rgba(79, 141, 247, 0.08), transparent 28%),
    linear-gradient(180deg, rgba(5, 10, 18, 0.96), rgba(10, 18, 30, 0.92));
}

.image-preview-stage img {
  width: 100%;
  height: auto;
  max-height: calc(100vh - 220px);
  object-fit: contain;
  display: block;
  margin: 0 auto;
}

.raw-payload-dialog {
  width: min(980px, calc(100vw - 32px));
}

.raw-payload-meta {
  margin-bottom: 12px;
}

.raw-payload-content {
  margin: 0;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(2, 6, 23, 0.72);
  color: #dbeafe;
  font-size: 12px;
  line-height: 1.55;
  overflow: auto;
  max-height: calc(100vh - 220px);
  white-space: pre-wrap;
  word-break: break-word;
}

.session-workbench {
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
}

.session-side {
  display: grid;
  gap: 16px;
}

.player-actions {
  gap: 8px;
}

.row-card,
.info-row {
  padding: 14px 16px;
}

.row-card {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr) auto;
  gap: 12px;
  align-items: center;
}

.row-card.is-selected,
.alarm-card.is-selected {
  border-color: var(--line-strong);
  background:
    linear-gradient(90deg, rgba(79, 141, 247, 0.1), rgba(79, 141, 247, 0.03) 18%, rgba(255, 255, 255, 0.01) 100%),
    var(--surface);
  box-shadow:
    inset 0 0 0 1px rgba(79, 141, 247, 0.18),
    0 0 0 1px rgba(79, 141, 247, 0.08),
    0 16px 36px rgba(15, 23, 42, 0.18);
}

.alarm-card.is-selected::before {
  background: linear-gradient(180deg, var(--accent), var(--primary));
  box-shadow: 0 0 18px rgba(79, 141, 247, 0.35);
}

.alarm-card.is-selected .alarm-thumb {
  border-color: rgba(79, 141, 247, 0.42);
  box-shadow: 0 0 0 1px rgba(79, 141, 247, 0.22);
}

.alarm-card.is-selected h3 {
  color: #ffffff;
}

.alarm-card.is-selected .row-meta,
.alarm-card.is-selected p {
  color: #c9d9f5;
}

.alarm-card.is-selected .badge.muted {
  border-color: rgba(96, 165, 250, 0.32);
  background: rgba(79, 141, 247, 0.12);
}

.compact .row-card {
  grid-template-columns: minmax(0, 1fr) auto;
  padding: 12px 14px;
}

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

.compact-info-grid .info-row {
  display: grid;
  gap: 6px;
  align-items: start;
}

.row-meta,
.latest-alarm-card p,
.workorder-column p,
.tts-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 13px;
}

.pill,
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.pill.online {
  background: rgba(34, 197, 94, 0.14);
  color: var(--success);
}

.pill.offline,
.badge.danger {
  background: rgba(248, 113, 113, 0.14);
  color: var(--danger);
}

.pill.pending,
.badge.warning {
  background: rgba(245, 158, 11, 0.14);
  color: var(--warning);
}

.badge {
  background: rgba(79, 141, 247, 0.14);
  color: var(--primary);
}

.badge.muted {
  background: rgba(148, 163, 184, 0.14);
  color: var(--muted);
}

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

.pager {
  justify-content: center;
}

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

.pager-jump {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.pager-input {
  width: 84px;
  min-height: 34px;
  text-align: center;
}

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

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.5);
  z-index: 40;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 24px);
  min-width: 260px;
  max-width: min(90vw, 560px);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
  z-index: 120;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1440px) {
  .chart-grid,
  .cockpit-grid,
  .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1280px) {
  .login-shell,
  .cockpit-layout,
  .device-layout,
  .alarm-workbench,
  .session-workbench,
  .settings-grid,
  .tts-config-layout,
  .tts-editor-grid,
  .settings-field-grid,
  .session-summary {
    grid-template-columns: 1fr;
  }

  .alarm-card {
    grid-template-columns: 1fr;
  }

  .summary-strip,
  .latest-alarm-card {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .workorder-card,
  .settings-field-grid,
  .settings-field-grid.compact {
    grid-template-columns: 1fr;
  }

  .latest-alarm-cell-thumb .latest-alarm-thumb {
    aspect-ratio: 16 / 9;
  }

  .alarm-card-toolbar,
  .alarm-detail-grid,
  .alarm-detail-toolbar {
    grid-template-columns: 1fr;
  }

  .alarm-detail-wide {
    grid-column: span 1;
  }
}

@media (max-width: 1080px) {
  .app-layout {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .sidebar {
    position: fixed;
    inset: 16px auto 16px 16px;
    width: min(320px, calc(100vw - 32px));
    transform: translateX(calc(-100% - 20px));
    z-index: 50;
    transition: transform 220ms ease;
  }

  .sidebar.is-open {
    transform: translateX(0);
  }

  .sidebar-toggle {
    display: inline-flex;
    align-items: center;
  }
}

@media (max-width: 900px) {
  .shell-topbar,
  .page-header,
  .panel-header,
  .row-card,
  .permission-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .topbar-actions,
  .panel-actions,
  .quick-actions,
  .tts-row,
  .workflow-strip,
  .alarm-toolbar,
  .login-options {
    flex-direction: column;
    align-items: stretch;
  }

  .chart-grid,
  .runtime-grid,
  .cockpit-grid,
  .role-grid,
  .compact-info-grid {
    grid-template-columns: 1fr;
  }

  .user-box,
  .info-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .login-screen,
  .app-layout {
    padding: 14px;
  }

  .player-stage {
    height: 420px;
  }

  .image-preview-modal {
    padding: 12px;
  }

  .image-preview-dialog {
    max-height: calc(100vh - 24px);
    padding: 14px;
  }

  .image-preview-header,
  .image-preview-actions {
    flex-wrap: wrap;
  }


  .pie-ring {
    width: 150px;
    height: 150px;
  }
}