@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap");

/* Default (Dark) Theme Variables */
:root {
  --bg-color: #1a1a2e;
  --card-bg-color: #272c43;
  --glow-color: #00d2ff;
  --text-color: #e0e0e0;
  --accent-color: #e94560;
  --shadow-color: rgba(0, 0, 0, 0.4);
  --border-color: rgba(255, 255, 255, 0.1);
}

/* Light Theme Variables */
.light-theme {
  --bg-color: #f0f4f8;
  --card-bg-color: #ffffff;
  --glow-color: #007bff;
  --text-color: #333333;
  --accent-color: #d13054;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --border-color: rgba(0, 0, 0, 0.1);
}

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.dashboard-container {
  width: 95%;
  max-width: 1200px;
  position: relative;
}

.dashboard-header {
  text-align: center;
  margin-bottom: 40px;
}

.dashboard-header h1 {
  font-size: clamp(2em, 5vw, 3.5em);
  font-weight: 600;
  letter-spacing: 2px;
  background: linear-gradient(90deg, var(--glow-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.theme-toggle-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 10px 15px;
  border: none;
  background-color: var(--card-bg-color);
  color: var(--text-color);
  border-radius: 50px;
  cursor: pointer;
  font-size: 1em;
  box-shadow: 0 0 10px var(--shadow-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.theme-toggle-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 15px var(--shadow-color);
}

.connection-status {
  text-align: center;
  padding: 10px;
  border-radius: 10px;
  margin-bottom: 20px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.connected {
  background-color: rgba(0, 255, 110, 0.2);
  color: #00ff6e;
  box-shadow: 0 0 10px rgba(0, 255, 110, 0.3);
}

.disconnected {
  background-color: rgba(255, 99, 132, 0.2);
  color: #ff6384;
  box-shadow: 0 0 10px rgba(255, 99, 132, 0.3);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  grid-template-areas:
    "fan-control"
    "temp-panel"
    "air-quality-panel"
    "charging-panel"
    "log-panel";
}

.fan-control {
  grid-area: fan-control;
}
.temp-panel {
  grid-area: temp-panel;
}
.air-quality-panel {
  grid-area: air-quality-panel;
}
.charging-panel {
  grid-area: charging-panel;
}
.log-panel {
  grid-area: log-panel;
}

.panel {
  background-color: var(--card-bg-color);
  padding: 25px;
  border-radius: 15px;
  box-shadow: 0 0 20px var(--shadow-color);
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  backdrop-filter: blur(10px);
}

.panel:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 30px var(--shadow-color);
}

.panel h2 {
  font-size: 1.2em;
  font-weight: 400;
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 10px;
  margin-bottom: 15px;
  width: 100%;
}

.data-display {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}

.data-display p {
  font-size: 2.5em;
  font-weight: 600;
  color: var(--glow-color);
  text-shadow: 0 0 10px rgba(0, 210, 255, 0.5);
  transition: color 0.3s ease-in-out;
  margin: 0;
}

.status-indicator {
  font-size: 1.5em;
  font-weight: 600;
  padding: 8px 15px;
  border-radius: 25px;
  display: inline-block;
  color: #fff;
  background-color: #666;
  transition: all 0.3s ease-in-out;
  border: 2px solid transparent;
}

#fan-status.active {
  background-color: var(--glow-color);
  box-shadow: 0 0 15px var(--glow-color);
  border-color: var(--glow-color);
}

#socket-status.active {
  background-color: #00ff6e;
  box-shadow: 0 0 15px #00ff6e;
  border-color: #00ff6e;
}

.toggle-btn {
  background-color: var(--accent-color);
  color: #fff;
  border: none;
  padding: 12px 25px;
  border-radius: 25px;
  cursor: pointer;
  font-size: 1em;
  font-weight: 600;
  transition: all 0.3s ease;
  margin-top: 15px;
  box-shadow: 0 4px 15px rgba(233, 69, 96, 0.3);
}

.toggle-btn:hover:not(:disabled) {
  background-color: #ff6384;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(233, 69, 96, 0.4);
}

.toggle-btn:disabled {
  background-color: #666;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.log-content {
  max-height: 250px;
  overflow-y: auto;
  width: 100%;
  text-align: left;
  border-radius: 10px;
  background-color: rgba(0, 0, 0, 0.1);
  padding: 10px;
}

.log-content::-webkit-scrollbar {
  width: 6px;
}

.log-content::-webkit-scrollbar-track {
  background: var(--card-bg-color);
  border-radius: 3px;
}

.log-content::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: 3px;
}

.log-entry {
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.2s ease;
}

.log-entry:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 5px;
  padding-left: 5px;
}

.log-entry:last-child {
  border-bottom: none;
}

.timestamp {
  font-weight: 600;
  font-size: 0.9em;
}

.log-charging .log-content .log-entry .timestamp {
    color: var(--glow-color); 
}@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap");

/* Default (Dark) Theme Variables */
:root {
  --bg-color: #12121e; /* Deep dark background */
  --card-bg-color: #1e1e30; /* Slightly lighter card background */
  --glow-color: #00bcd4; /* Brighter, professional cyan/blue */
  --text-color: #e0e0e0;
  --accent-color: #ff5722; /* Warm accent color (e.g., orange/red) */
  --shadow-color: rgba(0, 0, 0, 0.6);
  --border-color: rgba(255, 255, 255, 0.15);
  --transition-speed: 0.4s; /* Smoother transitions */
}

/* Light Theme Variables */
.light-theme {
  --bg-color: #f5f7fa;
  --card-bg-color: #ffffff;
  --glow-color: #1976d2;
  --text-color: #333333;
  --accent-color: #e64a19;
  --shadow-color: rgba(0, 0, 0, 0.15);
  --border-color: rgba(0, 0, 0, 0.1);
}

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  transition: background-color var(--transition-speed) ease,
    color var(--transition-speed) ease;
}

/* --- LOGIN CONTAINER STYLES (Modernized & Responsive) --- */
.auth-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  
  /* Modern styling */
  background-color: var(--card-bg-color);
  padding: 40px 30px;
  border-radius: 12px; /* Subtle rounding */
  box-shadow: 0 10px 30px var(--shadow-color);
  width: 90%;
  max-width: 400px;
}

.auth-container h2 {
  font-size: 1.8em;
  color: var(--glow-color);
  margin-bottom: 20px;
  text-align: center;
}

.auth-container input {
  width: 100%;
  padding: 14px 15px; /* Increased padding for better tap targets */
  border: 1px solid var(--border-color);
  border-radius: 8px; 
  background-color: var(--bg-color);
  color: var(--text-color);
  font-size: 1em;
  transition: all 0.3s ease;
}

.auth-container input:focus {
  outline: none;
  border-color: var(--glow-color);
  box-shadow: 0 0 8px rgba(0, 188, 212, 0.5); 
}

#login-btn {
  width: 100%;
  margin-top: 10px;
  padding: 14px;
  border: none;
  border-radius: 8px;
  background-color: var(--accent-color);
  color: #fff;
  font-size: 1.1em;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

#login-btn:hover {
  background-color: #ff7043; /* Lighter shade on hover */
  transform: translateY(-1px);
}

.auth-error {
  color: var(--accent-color);
  font-size: 0.9em;
  font-weight: 400;
  margin-top: 5px;
}
/* --- END LOGIN CONTAINER STYLES --- */


.dashboard-container {
  width: 100%;
  max-width: 1200px;
  position: relative;
}

.dashboard-header {
  text-align: center;
  margin-bottom: 40px;
  position: relative; /* Container for absolute buttons */
}

.dashboard-header h1 {
  font-size: clamp(2em, 5vw, 3.5em);
  font-weight: 700; /* Bolder header */
  letter-spacing: 2px;
  background: linear-gradient(90deg, var(--glow-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
}

.theme-toggle-btn {
  position: absolute;
  top: 50%; /* Center vertically with header text */
  transform: translateY(-50%);
  right: 0;
  padding: 8px 12px;
  border: none;
  background-color: var(--bg-color);
  color: var(--text-color);
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.9em;
  box-shadow: 0 0 10px var(--shadow-color);
  transition: all var(--transition-speed) ease;
}

/* Adjusting logout button position */
#logout-btn {
  right: 100px; /* Move based on theme button size */
}

.theme-toggle-btn:hover {
  background-color: var(--accent-color);
  transform: translateY(-50%) scale(1.05);
  box-shadow: 0 0 15px rgba(255, 87, 34, 0.4);
}

.connection-status {
  text-align: center;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 25px;
  font-weight: 600;
  font-size: 1em;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
}

.connected {
  background-color: rgba(0, 255, 110, 0.1);
  color: #00ff6e;
  box-shadow: 0 0 10px rgba(0, 255, 110, 0.3);
}

.disconnected {
  background-color: rgba(255, 87, 34, 0.1); /* Using the accent color for disconnect */
  color: var(--accent-color);
  box-shadow: 0 0 10px rgba(255, 87, 34, 0.3);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); /* Min size increased */
  gap: 25px;
  /* Grid areas defined for smaller screens (mobile/tablet) */
  grid-template-areas:
    "fan-control"
    "temp-panel"
    "air-quality-panel"
    "charging-panel"
    "log-panel";
}

/* Panel Styling Refinement (Professional Look) */
.panel {
  background-color: var(--card-bg-color);
  padding: 30px; /* Increased padding */
  border-radius: 12px;
  box-shadow: 0 5px 20px var(--shadow-color); /* Softer shadow */
  border: 1px solid var(--border-color);
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.panel:hover {
  transform: translateY(-3px); /* Subtle lift */
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
}

.panel h2 {
  font-size: 1.1em;
  font-weight: 600;
  color: var(--text-color);
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 10px;
  margin-bottom: 20px;
  width: 100%;
}

.data-display {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}

.data-display p {
  font-size: clamp(2.5em, 5vw, 3.5em); /* Responsive font scaling */
  font-weight: 700;
  color: var(--glow-color);
  text-shadow: 0 0 15px rgba(0, 188, 212, 0.4);
  margin: 0;
}

.status-indicator {
  font-size: 1.4em;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: 25px;
  display: inline-block;
  color: #fff;
  background-color: #666;
  transition: all 0.3s ease-in-out;
  border: 2px solid transparent;
}

#fan-status.active {
  background-color: var(--glow-color);
  box-shadow: 0 0 15px var(--glow-color);
  border-color: var(--glow-color);
}

#socket-status.active {
  background-color: #00ff6e;
  box-shadow: 0 0 15px #00ff6e;
  border-color: #00ff6e;
}

.toggle-btn {
  background-color: var(--accent-color);
  color: #fff;
  border: none;
  padding: 12px 25px;
  border-radius: 8px; /* Squared corners for buttons */
  cursor: pointer;
  font-size: 1em;
  font-weight: 600;
  transition: all 0.3s ease;
  margin-top: 15px;
  box-shadow: 0 4px 15px rgba(255, 87, 34, 0.4);
}

.toggle-btn:hover:not(:disabled) {
  background-color: #ff7043;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 87, 34, 0.6);
}

.toggle-btn:disabled {
  background-color: #4a4a4a;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.mode-indicator {
  font-size: 0.9em;
  margin-top: 10px;
  opacity: 0.7;
}

/* Log Panel Refinements */
.log-content {
  max-height: 300px; /* Increased max height */
  overflow-y: auto;
  width: 100%;
  text-align: left;
  border-radius: 8px;
  background-color: var(--bg-color); /* Use a darker background for logs */
  padding: 10px;
}

/* Log Scrollbar */
.log-content::-webkit-scrollbar {
  width: 6px;
}

.log-content::-webkit-scrollbar-track {
  background: var(--bg-color);
}

.log-content::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: 3px;
}

.log-entry {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05); /* Lighter border */
  transition: background-color 0.2s ease;
}

.log-entry:hover {
  background-color: rgba(255, 255, 255, 0.03);
  border-radius: 5px;
  padding-left: 5px;
}

.timestamp {
  font-weight: 700;
  font-size: 0.95em;
}

.log-content .log-entry .timestamp {
    color: var(--glow-color); /* Charging status color */
}

.log-content .log-entry.log-finished {
   opacity: 0.8; 
}

.log-content .log-entry.log-finished .timestamp {
   color: var(--accent-color); /* Finished status color */
}

/* --- RESPONSIVE DESIGN ENHANCEMENTS --- */

/* Desktop/Large Screens (>= 1024px) - Ensure 4 columns */
@media (min-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: repeat(4, 1fr);
    grid-template-areas:
      "fan-control temp-panel air-quality-panel charging-panel"
      "log-panel log-panel log-panel log-panel";
  }
}

/* Tablet Screens (768px to 1023px) - Optimized for 3 columns */
@media (min-width: 768px) and (max-width: 1023px) {
    .dashboard-grid {
        grid-template-columns: repeat(3, 1fr);
        grid-template-areas:
            "fan-control temp-panel charging-panel"
            "air-quality-panel air-quality-panel air-quality-panel"
            "log-panel log-panel log-panel";
        gap: 20px;
    }
    /* Move the Air Quality panel to its own full row for clarity */
    .air-quality-panel {
        grid-area: air-quality-panel;
    }
}

/* Mobile Screens (< 768px) - Stacked vertically */
@media (max-width: 767px) {
  
  .dashboard-header {
      margin-bottom: 20px;
      padding-top: 50px; /* Space for buttons */
      text-align: left;
  }
    
  .dashboard-header h1 {
      font-size: 2em;
  }
    
  /* Reposition buttons for mobile header */
  .theme-toggle-btn, #logout-btn {
      position: fixed;
      top: 10px;
      transform: none;
      right: auto;
      z-index: 100;
  }
    
  .theme-toggle-btn {
      left: 10px;
      right: auto;
  }
  #logout-btn {
      right: 10px;
      left: auto;
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: 15px;
    grid-template-areas:
      "fan-control"
      "charging-panel"
      "temp-panel"
      "air-quality-panel"
      "log-panel";
  }
    
  .panel {
      padding: 25px;
  }
    
  .data-display p {
      font-size: 2.5em;
  }
}

/* --- ANIMATIONS (Kept for professional flair) --- */
@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 1;
  }
}

.loading {
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes success {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

.success-animation {
  animation: success 0.3s ease-in-out;
}

.log-content .log-entry.log-finished {
   opacity: 0.7; 
}

.log-content .log-entry.log-finished .timestamp {
   color: var(--accent-color); 
}

.log-content .log-entry.log-finished:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 5px;
    padding-left: 5px;
    opacity: 1; 
}

@media (min-width: 768px) {
  .dashboard-grid {
    grid-template-columns: repeat(4, 1fr);
    grid-template-areas:
      "fan-control temp-panel air-quality-panel charging-panel"
      "log-panel log-panel log-panel log-panel";
  }
}

@media (max-width: 768px) {
  /* Stack charts vertically on smaller screens */
  .history-charts-wrapper {
    flex-direction: column;
    height: auto;
    max-height: none;
  }
  .chart-container {
    height: 250px; /* Give a fixed height when stacked */
  }
}

@media (max-width: 480px) {
  .dashboard-container {
    width: 100%;
    padding: 0 10px;
  }

  .panel {
    padding: 20px;
  }

  .data-display p {
    font-size: 2em;
  }

  .theme-toggle-btn {
    position: relative;
    top: auto;
    right: auto;
    margin: 10px auto;
    display: block;
  }
}

/* Loading Animation */
@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 1;
  }
}

.loading {
  animation: pulse 1.5s ease-in-out infinite;
}

/* Success Animation */
@keyframes success {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

.success-animation {
  animation: success 0.3s ease-in-out;
}