:root {
  /* Brand colors */
  --brand-green-dark: #5f9b62;
  --brand-green-dark-50: #5f9b6250;
  --brand-green: #92c594;
  --brand-green-light: #d4edda;
  --brand-bg: #f8faf8;
  --brand-gray-light: #e5e5e5;
  --brand-gray: #808080;
  --brand-gray-dark: #4d4d4d;
  --brand-black-95: #0d0d0d;

  /* Skeleton colors (for compatibility) */
  --skeleton-primary: #33C3F0;
  --skeleton-primary-hover: #1EAEDB;
  --skeleton-text: #222;
  --skeleton-links: #1EAEDB;
  --skeleton-links-hover: #0FA0CE;
  --skeleton-border: #bbb;
  --skeleton-border-focus: #888;
  --skeleton-border-primary: #33C3F0;
  --skeleton-border-light: #E1E1E1;
  --skeleton-input-border: #D1D1D1;
  --skeleton-code-background: #F1F1F1;

  /* Shadow and transparency colors */
  --shadow-green-15: rgba(111, 191, 115, 0.15);
  --shadow-green-20: rgba(111, 191, 115, 0.2);
  --shadow-green-10: rgba(111, 191, 115, 0.1);
}

/* =========================================
   General Layout & Body
   ========================================= */
body {
  overflow-y: auto;
  background-color: var(--brand-bg);
}

body::-webkit-scrollbar {
  width: 12px;
}

body::-webkit-scrollbar-thumb {
  background-color: var(--brand-green);
  border-radius: 10px;
}

body::-webkit-scrollbar-track {
  background-color: var(--brand-green-light);
}

.container {
  min-height: calc(100vh - 4em);
  margin-bottom: 2em;
}

@media (min-width: 600px) {
  .container {
    margin: 20px auto;
    padding: 20px;
  }
}

/* =========================================
   Header & Navbar
   ========================================= */
.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 3px solid var(--brand-green);
}

.header-left {
  flex: 0 0 auto;
  color: var(--brand-black-95);
  margin: 0;
  padding: 0;
  font-size: 4.4rem;
  font-weight: 300;
  letter-spacing: -0.05em;
}

.header-left a {
  text-decoration: none;
  color: inherit;
}

.header-left a:hover {
  color: var(--brand-green-dark);
}

.header-center {
  flex: 1 1 auto;
  margin: 0;
  padding: 0;
  color: var(--brand-gray);
  position: relative;
  top: 2px;
  font-size: 2.1rem;
  font-weight: 300;
}

.header-right {
  flex: 0 0 auto;
  display: flex;
  gap: 0.5rem;
  align-items: flex-end; 
}

.navbar {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.5rem;
}

.navbar a.nav-button {
  text-decoration: none;
}

.separator {
  width: 1px;
  background-color: var(--brand-gray-light);
  margin: 0 2px;
}

.nav-button {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.3rem;
  font-family: "Raleway", "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif;
  width: 46px; 
  height: 32px; 
  justify-content: center; 
}

.nav-button img {
  width: 24px;
  height: 24px;
  margin-bottom: 2px;
}

.nav-button small {
  font-size: 0.7rem;
  color: var(--brand-gray);
  line-height: 1;
}

.nav-button.active {
  box-shadow: 0 0 6px 1px var(--brand-green-dark-50);
  border-radius: 8px;
  color: var(--brand-green-dark);
  border: 1px solid var(--brand-green);
}

.nav-button.active img {
  filter: invert(41%) sepia(45%) saturate(498%) hue-rotate(84deg) brightness(93%) contrast(91%);
}

.nav-button.active small {
  color: var(--brand-green-dark);
}

@media screen and (max-width: 768px) {
  .subtitle-pre,
  .header-center {
    display: none;
  }

  .header-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.1rem;
  }

  .header-right {
    width: 100%;
    justify-content: center;
  }
}

/* =========================================
   Headings & Text Content
   ========================================= */
h1 {
  font-size: 1.4em;
  font-weight: bold;
  color: var(--brand-green);
  margin-bottom: 1.4rem;
}

h2 {
  font-size: 1.2em;
  font-weight: bold;
  color: var(--brand-green);
  margin-bottom: 1.2rem;
  padding-top: 2.5rem;
}

h3 {
  font-size: 1em;
  font-weight: bold;
  color: var(--brand-green-dark);
  margin-bottom: 1rem;
  padding-top: 2rem;
}

.text-content {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
  line-height: 1.6;
  text-align: justify;
}

.text-content h3 {
  color: var(--brand-gray-dark);
  margin-bottom: 1rem;
}

.text-content p {
  margin-bottom: 1rem;
  color: var(--brand-gray);
  font-size: 1.1em;
}

@media (max-width: 600px) {
  .text-content {
    padding: 0 0.5rem;
    margin: 1rem auto;
  }
}

/* =========================================
   Buttons & Controls
   ========================================= */
.button-group {
  margin: 10px 0;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center; /* Ensure vertical alignment */
}

.button-cluster {
  display: flex;
  gap: 3px;
  align-items: center;
  /* Make clusters cohesive blocks */
  flex-wrap: nowrap;
  /* Reset container styles */
  margin: 0;
  padding: 0;
  border: none;
}

/* Containers for specific button groups - Simplified: rely on .button-cluster */
#toggle-buttons-timeframe,
#toggle-buttons-metric,
#toggle-buttons-online {
  /* Inherits display:flex from .button-cluster if applied, or defaults */
}

.vertical-separator {
  border-left: 1px solid var(--brand-gray-light);
  height: 30px;
  margin: 0 6px;
}

/* Base button styles for .button-group context */
.button-group .button {
  font-size: 1.2rem;
  border: 1px solid var(--brand-green-light);
  border-radius: 4px;
  background-color: transparent;
  color: var(--brand-gray-dark);
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 300;
  margin: 0; /* Removing individual margins, using gap instead */
  box-sizing: border-box; /* Critical for consistent sizing */
  
  /* Flex centering for content */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

/* Button States */
.button-group .button:hover {
  background-color: var(--brand-green-light);
  border-color: var(--brand-green);
  color: var(--brand-gray-dark);
}

.button-group .button.active {
  background-color: var(--brand-green-light);
  color: var(--brand-green-dark);
  border-color: var(--brand-green);
  font-weight: 600;
}

.button-group .button[disabled] {
  background-color: transparent;
  color: var(--brand-green-light);
  border-color: var(--brand-green-light);
  cursor: not-allowed;
  opacity: 0.7;
  font-weight: 300;
}

/* Specific Button Variants */

/* 1. Square Timeframe Buttons (44px) */
#toggle-buttons-timeframe .button {
  width: 44px;
  height: 44px;
  padding: 0;
  margin: 0;
}

/* 2. Rectangular Metric/Online Buttons (80x44px - Height matched to timeframe) */
#toggle-buttons-metric .button,
#toggle-buttons-online .button {
  width: 80px;
  height: 44px; /* Increased from 40px to 44px to match timeframe buttons */
  padding: 0;
  margin: 0;
}

/* 3. Room Select (Matches Timeframe Buttons - 44px) */
#room-filter .room-select {
  width: 250px;
  height: 44px; /* Matches timeframe buttons height */
  line-height: normal; /* Let flexbox handle alignment */
  box-sizing: border-box; /* Include padding/border in height */
  padding: 0 30px 0 15px;
  margin: 0;
  
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--brand-gray-dark);
  border: 1px solid var(--brand-green-light);
  background-color: transparent;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  
  /* Custom arrow */
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23808080' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
}

/* Reusing hover/focus states from .button-group .button where possible */
#room-filter .room-select:hover {
  background-color: var(--brand-green-light);
  border-color: var(--brand-green);
  color: var(--brand-gray-dark);
}

#room-filter .room-select:focus {
  outline: none;
  border-color: var(--brand-green);
}

#room-filter .room-select option {
  background-color: var(--brand-bg);
  color: var(--brand-gray-dark);
}

/* =========================================
   Charts & Tables
   ========================================= */
.room-title-wrapper {
  background-color: var(--brand-green-light);
  border-radius: 25px;
  width: 100%;
  text-align: center;
  display: table;
  padding: 0.5rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.room-title {
  color: var(--brand-green-dark);
  display: table-cell;
  vertical-align: middle;
  padding: 0;
}

#chart-content {
  width: 100%;
  padding: 0;
  margin: 0;
}

#chart-content .chart-container {
  padding-left: 0;
  padding-right: 0;
  margin-left: 0;
  margin-right: 0;
  width: 100%;
  box-sizing: border-box;
}

#chart .plotly,
#chart .plotly .main-svg,
#chart .js-plotly-plot,
#chart .plot-container,
#chart {
  width: 100% !important;
  max-width: 100% !important;
}

#chart {
  display: block !important;
  overflow: hidden !important;
}

#chart .plotly {
  margin-left: auto !important;
  margin-right: auto !important;
}

.ytitle {
  font-family: "Raleway", "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
  font-size: 14px !important;
  color: var(--brand-green-dark) !important;
  font-weight: bold !important;
}

.ytick text {
  font-family: "Raleway", "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
  font-size: 11px !important;
  visibility: visible !important;
}

.plot-container .plot-area {
  margin: 0 10px !important;
}

@media (max-width: 768px) {
  #chart-content .chart-container {
    padding: 0 5px !important;
  }
}

/* =========================================
   Tables (Sensors)
   ========================================= */
.sensor-table-container {
  margin: 0;
  display: flex;
  justify-content: flex-start;
}

.sensor-table {
  width: auto;
  min-width: 400px;
  max-width: 800px;
  margin-right: auto; 
  border-collapse: collapse;
  font-size: 0.9em;
}

.sensor-table th,
.sensor-table td {
  padding: 2px 16px;
}

.sensor-table th {
  background-color: var(--brand-green);
  color: var(--brand-bg);
  padding: 4px 8px;
  text-align: center;
  font-family: 'Consolas', 'Monaco', monospace;
  font-weight: bold;
}

.sensor-table td {
  padding: 2px 8px;
  white-space: nowrap;
}

.sensor-table .center {
  text-align: center;
}

.sensor-table .mono {
  font-family: 'Consolas', 'Monaco', monospace;
}

.sensor-table tbody tr:nth-child(even) {
  background-color: var(--brand-green-light);
}

.sensor-table .room-cell {
  background-color: var(--brand-green);
  color: white;
  font-weight: bold;
  text-align: left;
  vertical-align: middle;
  font-family: 'Consolas', 'Monaco', monospace;
}

.room-header {
  background-color: var(--brand-green);
  color: var(--brand-bg);
  font-weight: bold;
  text-align: left;
}

.room-header td {
  padding: 4px 8px;
}

/* =========================================
   Utilities & Misc
   ========================================= */
.htmx-indicator {
  display: none;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
  display: block;
}

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 12px;
  background: linear-gradient(
    to right,
    var(--brand-bg),
    var(--brand-green-light),
    var(--brand-green),
    var(--brand-green-dark),
    var(--brand-green),
    var(--brand-green-light),
    var(--brand-bg)
  );
  background-size: 200% 100%;
  animation: loading-gradient 2s ease infinite;
  z-index: 9999;
}

@keyframes loading-gradient {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.math-block {
  overflow-x: auto;
  padding: 1rem 0;
  text-align: center;
  font-size: 1.2em;
}

/* Footer alignment fix */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--brand-green-light);
  color: var(--brand-gray-dark);
  text-align: center;
  padding: 0;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.1em;
  font-weight: bold;
  line-height: 2em;
  height: 2em;
}

.footer-text {
  font-size: 0.8em;
  color: var(--brand-gray);
  font-style: italic;
}

.footer-text a {
  color: var(--brand-green);
}