/* ==========================================================================
   janmalte.de - Minimalistisches, schnelles Sensor Dashboard
   Reines, natives CSS3 Design-System (Zero Frameworks)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- CSS Root Variablen & Theming --- */
:root {
  /* Helles Design */
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-translucent: rgba(255, 255, 255, 0.88);
  --bg-interactive: #f1f5f9;
  --bg-interactive-hover: #e2e8f0;

  --border-subtle: #e2e8f0;
  --border-focus: #3b82f6;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --temp-color: #ef4444;
  --temp-bg-subtle: rgba(239, 68, 68, 0.08);

  --humidity-color: #0284c7;
  --humidity-bg-subtle: rgba(2, 132, 199, 0.08);

  --dew-color: #059669;
  --dew-bg-subtle: rgba(5, 150, 105, 0.08);

  --accent-primary: #2563eb;
  --status-online: #10b981;
  --status-offline: #ef4444;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Dunkles Design */
body.dark-mode {
  --bg-base: #090d16;
  --bg-surface: #111827;
  --bg-surface-translucent: rgba(17, 24, 39, 0.88);
  --bg-interactive: #1f293d;
  --bg-interactive-hover: #29354f;

  --border-subtle: rgba(255, 255, 255, 0.09);
  --border-focus: #60a5fa;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --temp-color: #f87171;
  --temp-bg-subtle: rgba(248, 113, 113, 0.12);

  --humidity-color: #38bdf8;
  --humidity-bg-subtle: rgba(56, 189, 248, 0.12);

  --dew-color: #34d399;
  --dew-bg-subtle: rgba(52, 211, 153, 0.12);

  --accent-primary: #3b82f6;

  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 14px 0 rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 28px 0 rgba(0, 0, 0, 0.65);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* --- Layout Container --- */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

main.container {
  padding-bottom: 3.5rem;
}

/* --- Navigation & Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-surface-translucent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  user-select: none;
}

.brand-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--temp-color) 0%, var(--humidity-color) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Live Status Badge */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  background-color: var(--bg-interactive);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

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

/* Online State (<= 15 Min) */
.status-pill.status-online {
  color: var(--text-secondary);
  border-color: rgba(16, 185, 129, 0.35);
}

.status-pill.status-online .status-dot {
  background-color: var(--status-online);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-ring-green 2s infinite;
}

@keyframes pulse-ring-green {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Offline State (> 15 Min) */
.status-pill.status-offline {
  color: #ef4444;
  background-color: rgba(239, 68, 68, 0.08);
  border-color: rgba(239, 68, 68, 0.35);
}

.status-pill.status-offline .status-dot {
  background-color: var(--status-offline);
  box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
  animation: pulse-ring-red 2s infinite;
}

@keyframes pulse-ring-red {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6); }
  70% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.header-actions {
  display: flex;
  align-items: center;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-interactive);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 1.15rem;
}

.icon-btn:hover {
  background-color: var(--bg-interactive-hover);
}

/* --- Hero & Dashboard Header --- */
.dashboard-hero {
  padding: 2.25rem 0 1.25rem;
}

.hero-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.hero-titles h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.2;
}

.hero-titles p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.35rem;
}

.meta-timestamp {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.meta-timestamp svg {
  color: var(--accent-primary);
  flex-shrink: 0;
}

/* --- Quick Metric Cards Grid --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.metric-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.45rem;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.metric-card.card-temp::before {
  background: linear-gradient(90deg, var(--temp-color), #fb7185);
}

.metric-card.card-humidity::before {
  background: linear-gradient(90deg, var(--humidity-color), #38bdf8);
}

.metric-card.card-dew::before {
  background: linear-gradient(90deg, var(--dew-color), #34d399);
}

.metric-card.card-avg::before {
  background: linear-gradient(90deg, #6366f1, #a855f7);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.card-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card-icon-badge {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}

.card-temp .card-icon-badge {
  background-color: var(--temp-bg-subtle);
  color: var(--temp-color);
}

.card-humidity .card-icon-badge {
  background-color: var(--humidity-bg-subtle);
  color: var(--humidity-color);
}

.card-dew .card-icon-badge {
  background-color: var(--dew-bg-subtle);
  color: var(--dew-color);
}

.card-avg .card-icon-badge {
  background-color: rgba(99, 102, 241, 0.1);
  color: #6366f1;
}

.metric-value-row {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}

.metric-value {
  font-size: 2.35rem;
  font-weight: 800;
  font-family: var(--font-sans);
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.1;
}

.metric-unit {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-muted);
}

.metric-subtext {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.badge-comfort {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
}

.comfort-optimal {
  background-color: rgba(16, 185, 129, 0.15);
  color: #10b981;
}

.comfort-moderate {
  background-color: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}

/* --- Chart Panel & Controls --- */
.chart-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 2rem;
}

.chart-panel-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.chart-title-group h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.chart-title-group p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Range Filter Pills */
.filter-pills {
  display: inline-flex;
  background-color: var(--bg-interactive);
  padding: 0.3rem;
  border-radius: var(--radius-md);
  gap: 0.25rem;
  border: 1px solid var(--border-subtle);
}

.filter-btn {
  padding: 0.45rem 0.95rem;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
}

.filter-btn:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.08);
}

.filter-btn.active {
  background-color: var(--accent-primary);
  color: #ffffff;
}

/* Chart Canvas Wrapper */
.chart-wrapper {
  position: relative;
  width: 100%;
  height: 440px;
  margin-bottom: 1.25rem;
}

#myChart {
  width: 100% !important;
  height: 100% !important;
}

/* Chart Loading Overlay */
.chart-loading {
  position: absolute;
  inset: 0;
  background-color: var(--bg-surface-translucent);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  border-radius: var(--radius-md);
  z-index: 10;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.chart-loading.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Period Analytics Bar --- */
.period-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.period-stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.65rem 0.85rem;
  background-color: var(--bg-interactive);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.period-stat-label {
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.period-stat-val {
  font-size: 1.05rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.period-stat-val.temp {
  color: var(--temp-color);
}

.period-stat-val.humidity {
  color: var(--humidity-color);
}

/* --- Responsive Layout --- */
@media (max-width: 768px) {
  .hero-titles h1 {
    font-size: 1.6rem;
  }

  .metric-value {
    font-size: 1.95rem;
  }

  .chart-wrapper {
    height: 340px;
  }

  .filter-pills {
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
  }

  .filter-btn {
    padding: 0.4rem 0.65rem;
    font-size: 0.78rem;
  }

  .header-inner {
    height: 3.75rem;
  }
}

@media (max-width: 480px) {
  .hero-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .meta-timestamp {
    width: 100%;
    justify-content: center;
  }

  .chart-panel {
    padding: 1rem;
  }

  .chart-wrapper {
    height: 300px;
  }
}