/* CSS Variables for Theme */
:root {
  --bg-primary: #f5f7fa;
  --bg-secondary: #ffffff;
  --text-primary: #2d3436;
  --text-secondary: #636e72;
  --accent-color: #0396FF;
  --accent-color-dark: #0D47A1;
  --border-color: #e1e8ed;
  --shadow-color: rgba(0,0,0,0.1);
  --hover-bg: #f8f9fa;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --accent-color: #2196F3;
  --border-color: #2d2d2d;
  --shadow-color: rgba(0,0,0,0.3);
  --hover-bg: #2d2d2d;
}

/* RESET & BASE STYLES */
* { box-sizing: border-box; }
body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}
/* TOP NAV */
.top-nav {
  width: 100%;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-color-dark));
  padding: 15px 25px;
  box-shadow: 0 4px 12px var(--shadow-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.top-nav .logo {
  font-size: 22px;
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}
.top-nav .actions { display: flex; gap: 12px; }
.top-nav .actions a,
.top-nav .actions button {
  color: #fff;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  font-size: 15px;
  border-radius: 8px;
  padding: 10px 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  gap: 6px;
}
.top-nav .actions a:hover,
.top-nav .actions button:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
/* CONTAINER LAYOUT */
.container { display: flex; flex: 1; overflow: hidden; }
/* SIDEBAR */
.sidebar {
  width: 320px;
  background: var(--bg-secondary);
  padding: 20px;
  overflow-y: auto;
  flex-shrink: 0;
  border-right: 1px solid var(--border-color);
  box-shadow: 2px 0 10px var(--shadow-color);
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.sidebar h2 {
  text-align: center;
  margin-top: 0;
  color: var(--text-primary); /* Use theme color */
  font-weight: 600;
  font-size: 1.4em;
  margin-bottom: 20px;
}
.sidebar input[type="text"] {
  width: 100%;
  padding: 12px 15px;
  margin-bottom: 15px;
  border-radius: 10px;
  border: 1px solid var(--border-color); /* Use theme color */
  background: var(--bg-primary); /* Use theme color */
  color: var(--text-primary); /* Use theme color */
  font-size: 14px;
  transition: all 0.3s ease;
}
.sidebar input[type="text"]:focus {
  border-color: var(--accent-color); /* Use theme color */
  box-shadow: 0 0 0 3px rgba(3,150,255,0.1);
  outline: none;
}
.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
}
.sidebar ul li {
  padding: 12px 15px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  background: var(--bg-secondary);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sidebar ul li:hover { background: var(--hover-bg); } /* Use theme hover */

/* زر الحذف للأجهزة (للمسؤول فقط) */
.delete-btn {
  color: #fff;
  background: #d9534f;
  border: none;
  border-radius: 3px;
  padding: 2px 5px;
  margin-left: 10px;
  cursor: pointer;
  font-size: 12px;
}
.edit-btn {
  color: #fff;
  background: #f0ad4e;
  border: none;
  border-radius: 3px;
  padding: 2px 5px;
  margin-left: 10px;
  cursor: pointer;
  font-size: 12px;
}
/* MAIN CONTENT */
.main-content {
  flex: 1;
  padding: 15px;
  background: var(--bg-primary); /* Use theme color */
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease;
}
/* CONTROLS */
.controls {
  background: var(--bg-secondary); /* Use theme color */
  padding: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  align-items: center;
  justify-content: center;
  border-radius: 15px;
  box-shadow: 0 8px 16px var(--shadow-color);
  position: sticky;
  top: 20px; /* Adjusted for potential top-nav height */
  z-index: 990; /* Lower than top-nav */
  margin: 0 20px 20px 20px;
  /* backdrop-filter: blur(10px); */ /* May cause performance issues, optional */
  border: 1px solid var(--border-color); /* Use theme color */
  color: var(--text-primary);
}
.controls select, .controls input {
  padding: 12px 15px;
  font-size: 15px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary); /* Lighter background for inputs */
  color: var(--text-primary);
  max-width: 200px;
  transition: all 0.3s ease;
}
.controls select:focus, .controls input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(3,150,255,0.1);
  outline: none;
}
.controls button {
  padding: 12px 20px;
  font-size: 15px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-color-dark));
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.controls button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}
#selectedDeviceContainer { color: var(--text-primary); margin: 10px; text-align: center; }
/* MAP SECTION */
#map {
  height: 600px; width: 90%; margin: 0 auto 20px auto;
  border-radius: 10px; box-shadow: 0 0 10px var(--shadow-color);
  border: 1px solid var(--border-color);
}
/* LOGS SECTION */
.logs {
  width: 90%;
  margin: 30px auto;
  padding: 25px;
  background: var(--bg-secondary);
  border-radius: 15px;
  box-shadow: 0 10px 20px var(--shadow-color);
  border: 1px solid var(--border-color);
}
.logs h2 {
  margin: 0 0 20px 0;
  text-align: center;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.5em;
}
.logs-controls {
  text-align: center;
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  background: var(--bg-primary); /* Lighter background */
  padding: 15px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
}
.logs-controls label {
  display: inline-flex;
  align-items: center;
  font-weight: 500;
  color: var(--text-primary);
}
.logs-controls input[type="text"] {
  width: 220px;
  padding: 12px 15px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary); /* Match main bg */
  color: var(--text-primary);
  transition: all 0.3s ease;
}
.logs-controls input[type="text"]:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(3,150,255,0.1);
  outline: none;
}
.logs table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 15px;
}
.logs th {
  background: var(--bg-primary); /* Lighter for header */
  color: var(--text-primary);
  font-weight: 600;
  padding: 15px;
  text-align: center;
  border-bottom: 2px solid var(--border-color);
  position: sticky;
  top: 0; /* If logs table scrolls independently */
}
.logs td {
  padding: 12px 15px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: background 0.3s ease;
}
.logs tr:hover td {
  background: var(--hover-bg);
  color: var(--text-primary);
}
.logs th.sortable {
  cursor: pointer;
  transition: all 0.3s ease;
}
.logs th.sortable:hover {
  background: var(--hover-bg);
  color: var(--accent-color);
}
.logs th.sortable::after {
  content: '⌄';
  display: inline-block;
  margin-left: 5px;
  transition: transform 0.3s ease;
}
.logs th.sortable.sorted-asc::after {
  transform: rotate(180deg);
}
/* ANALYTICS SECTION */
#analytics {
  width: 90%;
  max-width: 1200px;
  margin: 30px auto;
  background: var(--bg-secondary);
  padding: 25px;
  border-radius: 15px;
  box-shadow: 0 10px 20px var(--shadow-color);
  text-align: center;
  border: 1px solid var(--border-color);
}
#analytics h2 {
  margin: 0 0 20px 0;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.5em;
}
#analytics .chart-container {
  background: var(--bg-primary); /* Lighter for chart bg */
  padding: 15px;
  border-radius: 10px;
  margin-top: 20px;
  border: 1px solid var(--border-color);
}
#analytics p {
    color: var(--text-secondary);
}
canvas {
    background-color: var(--bg-secondary); /* Ensure canvas bg matches */
    border-radius: 8px;
}

/* TOAST NOTIFICATIONS */
#toastContainer {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.toast {
  background: linear-gradient(135deg, var(--accent-color), var(--accent-color-dark));
  color: #fff;
  padding: 12px 20px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  animation: fadein 0.5s, fadeout 0.5s 3.5s;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255,255,255,0.1);
}
.toast::before {
  content: '🔔';
  font-size: 1.2em;
}
@keyframes fadein { from { opacity: 0; transform: translateX(100%); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeout { from { opacity: 1; transform: translateX(0); } to { opacity: 0; transform: translateX(100%); } }

/* SMALL SCREENS */
@media (max-width: 768px) {
  .container { flex-direction: column; }
  .sidebar { width: 100%; order: 2; max-height: 300px; border-right: none; border-top: 1px solid var(--border-color); }
  .main-content { width: 100%; order: 1; }
  .controls { position: static; margin: 15px; width: auto; }
  #map { width: calc(100% - 30px); margin-left: 15px; margin-right: 15px; }
  .logs, #analytics { width: calc(100% - 30px); margin-left: 15px; margin-right: 15px;}
  .top-nav .logo { font-size: 18px; }
  .top-nav .actions a, .top-nav .actions button { font-size: 13px; padding: 8px 12px; }
}
/* ستايل خاص لعنصر المجموعة */
.group-header {
  background-color: var(--bg-primary); /* Lighter than item bg */
  font-weight: 600;
  cursor: pointer;
  position: relative;
  padding: 15px;
  border-radius: 10px;
  margin-bottom: 5px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--border-color);
}
.group-header:hover {
  background-color: var(--hover-bg);
  transform: translateX(-2px);
}
.group-header:after {
  content: '▼';
  font-size: 14px;
  color: var(--accent-color);
  transition: transform 0.3s ease;
}
.group-header.active:after {
  transform: rotate(180deg);
}
.group-devices {
  display: none;
  background-color: var(--bg-secondary); /* Main bg for items */
  border-radius: 8px;
  margin: 5px 0 10px 0;
  overflow: hidden;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
  border: 1px solid var(--border-color);
}
.group-devices li {
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  padding: 12px 15px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.group-devices li:hover {
  background-color: var(--hover-bg);
  padding-left: 20px;
}
.group-devices li:last-child {
  border-bottom: none;
}
.delete-btn, .edit-btn {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.3s ease;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.delete-btn {
  background: #ff4757;
  color: #fff;
}
.edit-btn {
  background: #ffa502;
  color: #fff;
}
.delete-btn:hover, .edit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Loading Overlay Styles */
#loadingOverlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  display: none; /* Hidden by default */
  justify-content: center;
  align-items: center;
  z-index: 10000; /* Very high z-index */
}

.spinner {
  border: 8px solid #f3f3f3; /* Light grey */
  border-top: 8px solid var(--accent-color); /* Blue */
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Sidebar forms styling */
.sidebar form {
    background-color: var(--bg-primary);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}
.sidebar form h3, .sidebar form h4 {
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--text-primary);
}
.sidebar form label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-secondary);
}
.sidebar form input[type="text"],
.sidebar form select {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
}
.sidebar form button[type="submit"] {
    width: 100%;
    padding: 10px 15px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s ease;
}
.sidebar form button[type="submit"]:hover {
    background-color: var(--accent-color-dark);
}