@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

:root {
  /* Colors from DESIGN.md */
  --color-canvas: #f5f5f5;
  --color-paper: #ffffff;
  --color-surface-alt: #fafafa;
  --color-ink: #0a0a0a;
  --color-ink-soft: #171717;
  --color-mid-gray: #737373;
  --color-hairline: #e5e5e5;
  --color-ember: #e7000b;
  --color-teal: #14b8a6; /* Example color for param cards based on screenshots */
  --color-pink: #ec4899;
  --color-purple: #a855f7;

  /* Typography */
  --font-onest: 'Onest', 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  
  /* Shadows */
  --shadow-subtle: 0px 0px 0px 1px rgba(23,23,23,0.05), 0px 1px 3px 0px rgba(0,0,0,0.1), 0px 1px 2px -1px rgba(0,0,0,0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-onest);
  background-color: var(--color-canvas);
  color: var(--color-ink);
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 268px;
  background-color: var(--color-surface-alt);
  border-right: 1px solid var(--color-hairline);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 24px 24px 16px;
}

.logo-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}

.logo-subtitle {
  font-size: 12px;
  color: var(--color-mid-gray);
}

.nav-menu {
  padding: 12px;
  flex-grow: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  cursor: pointer;
  margin-bottom: 4px;
  transition: all 0.2s ease;
}

.nav-item i {
  color: var(--color-mid-gray);
  font-size: 16px;
}

.nav-item:hover {
  background-color: var(--color-canvas);
}

.nav-item.active {
  background-color: var(--color-ink);
  color: var(--color-paper);
}

.nav-item.active i {
  color: var(--color-paper);
}

/* Internal Sensor Selector in Sidebar */
.sensor-selector {
  display: none; /* Shown only on specific tabs */
  padding: 16px 12px;
  border-top: 1px solid var(--color-hairline);
}

.sensor-selector-title {
  font-size: 12px;
  text-transform: uppercase;
  color: var(--color-mid-gray);
  letter-spacing: 0.6px;
  margin-bottom: 12px;
  padding-left: 12px;
}

.sensor-group {
  margin-bottom: 12px;
}

.sensor-group-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-ink);
  padding: 4px 12px;
  display: flex;
  justify-content: space-between;
}

.sensor-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 18px;
  font-size: 13px;
  border: 1px solid transparent;
  cursor: pointer;
  margin-bottom: 4px;
}

.sensor-item.selected {
  background-color: var(--color-paper);
  border-color: var(--color-ink);
}

.sensor-color-dot {
  width: 4px;
  height: 14px;
  border-radius: 2px;
}

/* Main Content Area */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 24px 48px;
}

/* Tabs */
.tab-content {
  display: none;
  flex-direction: column;
  gap: 24px;
}

.tab-content.active {
  display: flex;
}

/* Typography */
.page-title {
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.75px;
  margin-bottom: 4px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--color-mid-gray);
  margin-bottom: 24px;
}

/* Cards */
.card {
  background-color: var(--color-paper);
  border: 1px solid var(--color-hairline);
  border-radius: 24px;
  box-shadow: var(--shadow-subtle);
  padding: 20px;
}

/* Main Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.stat-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 120px;
}

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--color-mid-gray);
  letter-spacing: 0.6px;
}

.stat-value {
  font-size: 48px;
  font-weight: 600;
  letter-spacing: -2.4px;
  color: var(--color-ink);
}

.stat-card.alert .stat-value {
  color: var(--color-ember);
}

/* Sensor Sections */
.sensor-section {
  background-color: var(--color-paper);
  border: 1px solid var(--color-hairline);
  border-radius: 24px;
  box-shadow: var(--shadow-subtle);
  padding: 24px;
  margin-bottom: 24px;
}

.sensor-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.sensor-header-color {
  width: 4px;
  height: 24px;
  border-radius: 2px;
}

.sensor-header-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
}

.status-badge {
  background-color: var(--color-canvas);
  color: var(--color-ink-soft);
  font-size: 12px;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-badge::before {
  content: '●';
  font-size: 10px;
}

/* Param Grid */
.param-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.param-card {
  border: 1px solid var(--color-hairline);
  border-radius: 16px;
  padding: 16px;
  position: relative;
  overflow: hidden;
}

.param-card-accent {
  position: absolute;
  bottom: 0;
  left: 16px;
  width: 40px;
  height: 3px;
  border-radius: 1.5px;
}

.param-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.param-icon {
  color: var(--color-mid-gray);
  font-size: 14px;
}

.param-title {
  font-size: 12px;
  text-transform: uppercase;
  color: var(--color-mid-gray);
}

.param-value {
  font-size: 24px;
  font-weight: 600;
}

.param-unit {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-mid-gray);
}

/* Charts Tab */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.chart-card {
  padding: 16px;
  height: 280px;
  display: flex;
  flex-direction: column;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-size: 14px;
  font-weight: 500;
}

.chart-container {
  flex: 1;
  position: relative;
  width: 100%;
}

/* Custom table for main dashboard */
.sensors-table {
  width: 100%;
  border-collapse: collapse;
}

.sensors-table th {
  text-align: left;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--color-mid-gray);
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-hairline);
  font-weight: 500;
}

.sensors-table td {
  padding: 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--color-hairline);
}

.sensors-table tr:last-child td {
  border-bottom: none;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: 1fr 1fr;
  }
  .param-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .charts-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}