/* ========================================
   LeeGlass - Komari Theme
   极简玻璃拟态监控主题 · 设计灵感 leeyee.hk
   Design system inspired by shadcn/ui
   ======================================== */

/* === Design Tokens - Light Theme === */
:root {
  --radius: 0.625rem;
  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);

  --background: oklch(0.98 0.002 240);
  --foreground: oklch(0.18 0.01 240);

  --primary: oklch(0.21 0.01 240);
  --primary-foreground: oklch(0.985 0 0);

  --secondary: oklch(0.965 0.003 240);
  --secondary-foreground: oklch(0.21 0.01 240);
  --muted: oklch(0.965 0.003 240);
  --muted-foreground: oklch(0.55 0.012 240);
  --accent: oklch(0.965 0.003 240);
  --accent-foreground: oklch(0.21 0.01 240);

  --border: oklch(0.9 0.004 240);
  --ring: oklch(0.55 0.012 240);

  --code-bg: oklch(0.955 0.003 240);
  --selection-bg: oklch(0.55 0.012 240 / 0.18);

  /* Status & metrics */
  --ok: oklch(0.68 0.17 155);
  --warn: oklch(0.72 0.15 80);
  --crit: oklch(0.6 0.2 25);
  --net-up: oklch(0.65 0.13 215);
  --net-down: oklch(0.68 0.15 160);
  --chart-line: oklch(0.45 0.02 240);

  /* Glass morphism */
  --bg-grid-color: oklch(0.82 0.005 240 / 0.4);
  --glass-bg: oklch(1 0 0 / 0.32);
  --glass-bg-hover: oklch(1 0 0 / 0.5);
  --glass-border: oklch(0 0 0 / 0.08);
  --glass-border-hover: oklch(0 0 0 / 0.15);
  --glass-blur: blur(32px) saturate(200%) brightness(1.04);
  --glass-edge: inset 0 1px 0 oklch(1 0 0 / 0.5);
  --glass-shadow: 0 8px 32px oklch(0 0 0 / 0.05), 0 2px 8px oklch(0 0 0 / 0.04);
  --glass-shadow-hover: 0 12px 36px oklch(0 0 0 / 0.08), 0 4px 12px oklch(0 0 0 / 0.05);

  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.2s;
}

/* === Design Tokens - Dark Theme === */
html.dark {
  --background: oklch(0.16 0.008 240);
  --foreground: oklch(0.92 0.004 240);

  --primary: oklch(0.92 0.004 240);
  --primary-foreground: oklch(0.205 0.008 240);

  --secondary: oklch(0.27 0.008 240);
  --secondary-foreground: oklch(0.92 0.004 240);
  --muted: oklch(0.27 0.008 240);
  --muted-foreground: oklch(0.7 0.01 240);
  --accent: oklch(0.27 0.008 240);
  --accent-foreground: oklch(0.92 0.004 240);

  --border: oklch(1 0 0 / 0.1);
  --ring: oklch(0.55 0.012 240);

  --code-bg: oklch(1 0 0 / 0.1);
  --selection-bg: oklch(0.7 0.01 240 / 0.28);

  --ok: oklch(0.72 0.17 155);
  --warn: oklch(0.78 0.15 80);
  --crit: oklch(0.68 0.2 25);
  --net-up: oklch(0.75 0.12 215);
  --net-down: oklch(0.75 0.14 160);
  --chart-line: oklch(0.75 0.01 240);

  --bg-grid-color: oklch(1 0 0 / 0.035);
  --glass-bg: oklch(0.205 0.008 240 / 0.45);
  --glass-bg-hover: oklch(0.205 0.008 240 / 0.62);
  --glass-border: oklch(1 0 0 / 0.09);
  --glass-border-hover: oklch(1 0 0 / 0.16);
  --glass-blur: blur(32px) saturate(180%) brightness(1.02);
  --glass-edge: inset 0 1px 0 oklch(1 0 0 / 0.06);
  --glass-shadow: 0 8px 32px oklch(0 0 0 / 0.45), 0 2px 8px oklch(0 0 0 / 0.3);
  --glass-shadow-hover: 0 12px 36px oklch(0 0 0 / 0.55), 0 4px 12px oklch(0 0 0 / 0.35);
}

/* === Reset & Base === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:focus { outline: none; }

:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

::selection {
  background: var(--selection-bg);
  color: var(--foreground);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  color: var(--foreground);
  background-color: var(--background);
  background-image:
    linear-gradient(var(--bg-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid-color) 1px, transparent 1px);
  background-size: 20px 20px;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted-foreground); }
::-webkit-scrollbar-track { background: transparent; }

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 0.75rem 0;
}

/* === Shared glass surfaces === */
header,
.stats-card,
.node-card,
.detail-card,
.chart-card,
footer {
  background-color: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-edge), var(--glass-shadow);
}

/* === Header & Footer === */
header,
footer {
  width: calc(100% - 2rem);
  max-width: 880px;
  margin: 0 auto;
}

header {
  position: sticky;
  top: 0.75rem;
  z-index: 100;
}

.header-inner,
.footer-inner {
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
}

.header-inner { justify-content: space-between; }
.footer-inner { justify-content: center; }

.logo a {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--foreground);
  text-decoration: none;
  letter-spacing: -0.3px;
  transition: opacity var(--duration) var(--ease);
}

.logo a:hover { opacity: 0.8; }

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav { display: flex; gap: 0.25rem; }

nav a {
  text-decoration: none;
  color: var(--muted-foreground);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.375rem 0.625rem;
  border-radius: var(--radius-md);
  transition: color var(--duration) var(--ease), background-color var(--duration) var(--ease);
}

nav a:hover,
nav a.active {
  color: var(--accent-foreground);
  background-color: var(--accent);
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted-foreground);
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  user-select: none;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted-foreground);
  transition: background var(--duration) var(--ease);
}

.live-badge.connected .live-dot {
  background: var(--ok);
  animation: pulse 2s var(--ease) infinite;
}

.live-badge.connected { color: var(--foreground); }

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 oklch(0.68 0.17 155 / 0.45); }
  70% { box-shadow: 0 0 0 6px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.icon-btn,
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius-md);
  background: none;
  color: var(--muted-foreground);
  cursor: pointer;
  transition: color var(--duration) var(--ease), background-color var(--duration) var(--ease), transform 0.1s var(--ease);
}

.icon-btn:hover,
.theme-toggle:hover {
  color: var(--accent-foreground);
  background-color: var(--accent);
}

.icon-btn:active,
.theme-toggle:active { transform: scale(0.94); }

.icon-btn svg,
.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle .icon-moon { display: none; }
html.dark .theme-toggle .icon-sun { display: none; }
html.dark .theme-toggle .icon-moon { display: block; }

/* === Main Content === */
main {
  flex: 1;
  max-width: 880px;
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.page-header { margin-bottom: 1.75rem; }

.page-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--foreground);
  text-wrap: balance;
}

.page-subtitle {
  font-size: 0.9rem;
  color: var(--muted-foreground);
  margin-top: 0.35rem;
}

/* === Stats Overview === */
.stats-card {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}

.stat-item { min-width: 0; }

.stat-label {
  font-size: 0.78rem;
  color: var(--muted-foreground);
  margin-bottom: 0.2rem;
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stat-value small {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted-foreground);
}

/* === Group Tabs === */
.group-tabs {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
  margin-bottom: 1.25rem;
  scrollbar-width: none;
}

.group-tabs::-webkit-scrollbar { display: none; }

.tab-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--secondary);
  color: var(--secondary-foreground);
  font-size: 0.83rem;
  font-family: inherit;
  cursor: pointer;
  transition: color var(--duration) var(--ease), background-color var(--duration) var(--ease), border-color var(--duration) var(--ease);
}

.tab-btn:hover {
  color: var(--accent-foreground);
  background-color: var(--accent);
  border-color: var(--glass-border-hover);
}

.tab-btn.active {
  color: var(--primary-foreground);
  background-color: var(--primary);
  border-color: var(--primary);
  font-weight: 600;
}

/* === Node List & Cards === */
.node-list {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.node-card {
  padding: 1.35rem 1.6rem;
  cursor: pointer;
  transition:
    border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease),
    background-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}

.node-card:hover {
  border-color: var(--glass-border-hover);
  background-color: var(--glass-bg-hover);
  box-shadow: var(--glass-edge), var(--glass-shadow-hover);
  transform: translateY(-2px);
}

.node-card.offline {
  opacity: 0.6;
}

.node-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.15rem;
}

.status-dot {
  flex-shrink: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--muted-foreground);
}

.status-dot.online {
  background: var(--ok);
  animation: pulse 2s var(--ease) infinite;
}

.status-dot.offline { background: var(--crit); }
.status-dot.unknown { background: var(--muted-foreground); }

.node-name {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--foreground);
  line-height: 1.4;
}

.tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  color: var(--secondary-foreground);
  background: var(--secondary);
  padding: 0.1rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-weight: 500;
  line-height: 1.7;
  white-space: nowrap;
}

.tag-ok { color: var(--ok); }
.tag-warn { color: var(--warn); }
.tag-crit { color: var(--crit); }

.node-sub {
  font-size: 0.82rem;
  color: var(--muted-foreground);
  margin-bottom: 1rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* === Metrics === */
.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem 1.25rem;
}

.metric { min-width: 0; }

.metric-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.8rem;
  margin-bottom: 0.3rem;
}

.metric-top .m-label { color: var(--muted-foreground); }

.metric-top .m-value {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--foreground);
}

.bar {
  height: 6px;
  border-radius: 999px;
  background: var(--secondary);
  border: 1px solid var(--border);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--primary);
  width: 0%;
  transition: width 0.6s var(--ease), background-color 0.3s var(--ease);
}

.bar-fill.warn { background: var(--warn); }
.bar-fill.crit { background: var(--crit); }

.metric-sub {
  font-size: 0.72rem;
  color: var(--muted-foreground);
  margin-top: 0.25rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* === Node Card Footer === */
.node-foot {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--muted-foreground);
  font-variant-numeric: tabular-nums;
}

.node-foot .net-up { color: var(--net-up); font-weight: 600; }
.node-foot .net-down { color: var(--net-down); font-weight: 600; }

.node-foot .foot-msg {
  color: var(--warn);
  width: 100%;
  font-size: 0.78rem;
}

/* === Loading & Empty States === */
.loading-state,
.empty-state {
  text-align: center;
  padding: 4rem 0;
  color: var(--muted-foreground);
  font-size: 0.95rem;
}

.empty-state a { color: var(--foreground); }

@keyframes shimmer {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

.skeleton-card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  height: 170px;
  background: linear-gradient(90deg, var(--glass-bg) 25%, var(--glass-bg-hover) 50%, var(--glass-bg) 75%);
  background-size: 800px 100%;
  animation: shimmer 1.6s infinite linear;
}

/* === Detail Page === */
.detail-page { animation: fadeIn 0.3s var(--ease); }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted-foreground);
  text-decoration: none;
  padding: 0.375rem 0.625rem;
  margin: 0 0 1rem -0.625rem;
  border-radius: var(--radius-md);
  transition: color var(--duration) var(--ease), background-color var(--duration) var(--ease);
}

.back-link:hover {
  color: var(--accent-foreground);
  background-color: var(--accent);
}

.detail-card {
  padding: 1.75rem 2rem;
  margin-bottom: 1.25rem;
}

.detail-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.detail-head h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.35;
}

.detail-section-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted-foreground);
  margin: 1.5rem 0 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.detail-section-title:first-of-type { margin-top: 0; }

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.7rem 1.5rem;
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  font-size: 0.86rem;
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--border);
}

.info-item .i-label { color: var(--muted-foreground); flex-shrink: 0; }

.info-item .i-value {
  color: var(--foreground);
  font-weight: 500;
  text-align: right;
  word-break: break-all;
  font-variant-numeric: tabular-nums;
}

.live-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem 1.25rem;
}

.live-metrics .span2 { grid-column: span 2; }

.net-tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.net-tile {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--secondary);
  padding: 0.7rem 0.9rem;
  min-width: 0;
}

.net-tile .t-label {
  font-size: 0.72rem;
  color: var(--muted-foreground);
  margin-bottom: 0.15rem;
}

.net-tile .t-value {
  font-size: 0.98rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.net-tile .t-value.up { color: var(--net-up); }
.net-tile .t-value.down { color: var(--net-down); }

/* === Charts === */
.chart-card {
  padding: 1.4rem 1.6rem 1.1rem;
  margin-bottom: 1.25rem;
}

.chart-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.chart-title {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.2px;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.range-btns {
  display: flex;
  gap: 0.3rem;
}

.range-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 26px;
  padding: 0 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--secondary);
  color: var(--secondary-foreground);
  font-size: 0.75rem;
  font-family: inherit;
  cursor: pointer;
  transition: color var(--duration) var(--ease), background-color var(--duration) var(--ease), border-color var(--duration) var(--ease);
}

.range-btn:hover {
  color: var(--accent-foreground);
  background-color: var(--accent);
}

.range-btn.active {
  color: var(--primary-foreground);
  background-color: var(--primary);
  border-color: var(--primary);
  font-weight: 600;
}

.chart-wrap {
  position: relative;
  width: 100%;
}

.chart-wrap svg {
  display: block;
  width: 100%;
  height: auto;
}

.chart-no-data {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 120px;
  color: var(--muted-foreground);
  font-size: 0.85rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

.chart-vline {
  position: absolute;
  top: 0;
  width: 1px;
  background: var(--muted-foreground);
  opacity: 0;
  pointer-events: none;
}

.chart-dot {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--background);
  transform: translate(-50%, -50%);
  opacity: 0;
  pointer-events: none;
}

.chart-tip {
  position: absolute;
  z-index: 10;
  min-width: 120px;
  max-width: 260px;
  background: var(--glass-bg-hover);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border-hover);
  border-radius: var(--radius-md);
  box-shadow: var(--glass-shadow-hover);
  padding: 0.45rem 0.65rem;
  font-size: 0.72rem;
  line-height: 1.6;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, 0);
  transition: opacity 0.12s var(--ease);
  font-variant-numeric: tabular-nums;
}

.chart-tip .tip-time {
  color: var(--muted-foreground);
  margin-bottom: 0.1rem;
}

.chart-tip .tip-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
}

.chart-tip .tip-val {
  margin-left: auto;
  font-weight: 600;
  padding-left: 0.75rem;
}

/* === Footer === */
footer p {
  font-size: 0.82rem;
  color: var(--muted-foreground);
}

footer a {
  color: var(--muted-foreground);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--duration) var(--ease);
}

footer a:hover { color: var(--foreground); }

/* === Responsive === */
@media (max-width: 640px) {
  main { padding: 1.75rem 1rem 3rem; }

  .header-inner,
  .footer-inner { padding: 0 1rem; }

  .live-badge #live-badge-text { display: none; }
  .live-badge { padding: 0.2rem 0.45rem; }

  .stats-card { grid-template-columns: repeat(2, 1fr); padding: 1.1rem 1.25rem; }

  .node-card { padding: 1.15rem 1.2rem; }
  .metrics { grid-template-columns: 1fr; gap: 0.75rem; }

  .detail-card { padding: 1.25rem 1.2rem; }
  .detail-head h1 { font-size: 1.25rem; }
  .info-grid { grid-template-columns: 1fr; }
  .live-metrics { grid-template-columns: repeat(2, 1fr); }
  .net-tiles { grid-template-columns: repeat(2, 1fr); }

  .page-header h2 { font-size: 1.35rem; }
}

/* === Motion preferences === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}