:root {
  --bg: #0b1021;
  --card: #11172b;
  --panel: #0f1425;
  --text: #eef2ff;
  --muted: #a5b1d6;
  --accent: linear-gradient(135deg, #53f3ff, #7c8cff, #b14cff);
  --shadow: 0 15px 40px rgba(0, 0, 0, 0.35);
  font-family: "Noto Sans KR", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at 20% 20%, rgba(124, 140, 255, 0.08), transparent),
    radial-gradient(circle at 80% 0%, rgba(83, 243, 255, 0.12), transparent), var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.hero {
  position: relative;
  padding: 64px 24px 32px;
  overflow: hidden;
  background: linear-gradient(120deg, rgba(124, 140, 255, 0.18), rgba(83, 243, 255, 0.08));
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(177, 76, 255, 0.28), transparent 30%),
    radial-gradient(circle at 80% 0%, rgba(83, 243, 255, 0.3), transparent 35%);
  filter: blur(40px);
}

.hero__content {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
}

.hero__content h1 {
  margin: 12px 0 6px;
  font-size: 32px;
}

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

.hero__badge {
  display: inline-flex;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--accent);
  color: #0a0d16;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  box-shadow: var(--shadow);
}

.hero__nav {
  position: relative;
  max-width: 1100px;
  margin: 24px auto 0;
  display: flex;
  gap: 12px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.18);
  padding: 10px;
  backdrop-filter: blur(12px);
}

.hero__nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 12px 16px;
  border-radius: 10px;
  transition: 0.2s ease;
}

.hero__nav a.active,
.hero__nav a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.section {
  margin-bottom: 40px;
}

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

.refresh-note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  font-size: 12px;
  margin: 0 0 4px;
}

h2 {
  margin: 0;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  margin-top: 16px;
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card,
.panel {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(83, 243, 255, 0.3);
}

.card__header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.badge {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--panel);
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--muted);
}

.card__body {
  margin-top: 12px;
}

.card__cta {
  margin-top: 12px;
  color: #8f9bff;
  font-weight: 600;
}

.data-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.data-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--panel);
  border-radius: 10px;
  color: var(--muted);
}

.data-list strong {
  color: var(--text);
}

.timestamp {
  color: var(--muted);
  font-size: 12px;
  margin-top: 8px;
}

.empty {
  color: var(--muted);
  padding: 8px 0;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-weight: 600;
}

.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin: 0;
}

.stat-grid dt {
  color: var(--muted);
  margin-bottom: 4px;
}

.stat-grid dd {
  margin: 0;
  font-weight: 700;
  font-size: 20px;
}
.stat-grid .clickable-metric {
  cursor: pointer;
  color: #bde4ff;
}
.stat-grid .clickable-metric:focus-visible {
  outline: 2px solid rgba(83, 243, 255, 0.6);
  outline-offset: 3px;
  border-radius: 6px;
}
.stat-grid .clickable-metric:hover {
    color: #e5f4ff;
  }

.stat-grid dt {
    display: flex;
    align-items: center;
    gap: 6px;
  }

.metric-icon {
    font-size: 14px;
    opacity: 0.9;
  }

.stat-grid .unit,
.prediction-grid .unit {
    color: var(--muted);
    font-weight: 500;
    font-size: 14px;
    margin-left: 6px;
  }

  .chart-shell {
    background: linear-gradient(135deg, rgba(83, 243, 255, 0.06), rgba(17, 23, 43, 0.9));
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
  padding: 12px;
  min-height: 260px;
}

.chart-shell canvas {
  width: 100% !important;
  height: 320px !important;
}

.chart-hint {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13px;
}

.prediction-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.prediction-card {
  background: radial-gradient(circle at 20% 20%, rgba(83, 243, 255, 0.18), rgba(12, 20, 37, 0.92));
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 12px;
  min-height: 180px;
}

.footer {
  text-align: center;
  padding: 24px;
  color: var(--muted);
}

.breadcrumb a {
  color: #8f9bff;
  text-decoration: none;
  font-weight: 600;
}

.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
  align-items: start;
}

.sidebar {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 24px;
}

.sidebar__title {
  font-weight: 700;
  margin-bottom: 12px;
}

.sidebar__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar__item {
  width: 100%;
  text-align: left;
  padding: 12px;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.sidebar__item:hover,
.sidebar__item.active {
  border-color: rgba(83, 243, 255, 0.4);
  transform: translateX(2px);
}

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

.sidebar__item .mac {
  font-weight: 700;
}

.sidebar__meta {
  margin-top: 6px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
}

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

.detail-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.detail-panel {
  display: none;
  flex-direction: column;
  gap: 12px;
}

.detail-panel.active {
  display: flex;
}

.section--narrow {
  max-width: 520px;
  margin: 0 auto;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

.form input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--panel);
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: rgba(83, 243, 255, 0.4);
}

.btn--primary {
  background: var(--accent);
  color: #0a0d16;
  border-color: transparent;
}

.alert {
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 10px;
}

.alert--error {
  background: rgba(255, 99, 132, 0.15);
  border: 1px solid rgba(255, 99, 132, 0.4);
  color: #ffc1c8;
}

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

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}