:root {
  --primary-color: #FF6600;
  --primary-dark: #e65c00;
  --secondary-color: #034ea2;
  --secondary-light: #00a9ec;
  --success-color: #51b848;
  --danger-color: #f37021;
  --bg-light: #f9f9f9;
  --text-dark: #333;
  --border-light: #eee;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.2);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  color: var(--text-dark);
  min-height: 100vh;
}

/* ==================== HEADER ====================*/
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, #d8f9ffde 0%, #e8f5ff 100%);
  padding: 15px 30px;
  color: var(--text-dark);
  position: relative;
  box-shadow: var(--shadow-md);
  border-bottom: 5px solid var(--primary-color);
}

header img {
  height: 75px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  transition: transform var(--transition-normal);
}

header img:hover {
  transform: scale(1.05);
}

header .banner {
  left: 50%;
  font-size: 30px;
  font-weight: 700;
  background: linear-gradient(135deg, #00a9ec, #0088cc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  letter-spacing: 0.5px;
}

header .banner:nth-of-type(2) {
  font-size: 22px;
  font-weight: 600;
  margin-top: 8px;
}

/* ==================== NAVIGATION ====================*/
.nav-bar {
  position: sticky;
  top: 0px;
  z-index: 110;
  display: flex;
  justify-content: flex-end;
  background: linear-gradient(90deg, #f5a623, #ff9800);
  border-top: 2px solid var(--primary-color);
  border-bottom: 3px solid var(--primary-color);
  box-shadow: 0 4px 15px rgba(255, 102, 0, 0.3);
}

.nav-bar button {
  width: 165px;
  background: linear-gradient(180deg, #ffffff, #f5f5f5);
  color: var(--text-dark);
  border: 2px solid var(--primary-color);
  padding: 12px 20px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-bar button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), #ff8533);
  transition: left var(--transition-normal);
  z-index: -1;
}

.nav-bar button:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 102, 0, 0.4);
}

.nav-bar button:hover::before {
  left: 0;
}

.nav-bar button.active-nav {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: #fff;
  border-color: #ffaa33;
  box-shadow: 0 0 20px rgba(255, 102, 0, 0.6), inset 0 0 10px rgba(255, 255, 255, 0.1);
  text-shadow: 0 0 10px rgba(255, 102, 0, 0.5);
}

/* ==================== LOGO LINK ====================*/
.logo-link {
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: transform var(--transition-normal);
}

.logo-link:hover {
  transform: scale(1.05);
}

.logo-link img {
  height: 75px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* ==================== HEADINGS ====================*/
h1 {
  position: sticky;
  top: 56px;
  z-index: 100;
  text-align: left;
  color: #ffffff;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  padding: 20px 80px;
  margin: 0;
  font-size: 25px;
  font-weight: 700;
  box-shadow: var(--shadow-md);
  letter-spacing: 0.5px;
}

h3 {
  color: var(--primary-color);
  font-weight: 700;
  margin: 20px 0 15px 0;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ==================== CONTROLS ====================*/
.controls {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  justify-items: center;
  padding: 20px 15px;
  background: linear-gradient(180deg, #ffffff 0%, #f8f8f8 100%);
  border-bottom: 2px solid var(--border-light);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 122px;
  z-index: 95;
}

.controls input,
.controls select {
  padding: 10px 14px;
  font-size: 14px;
  border: 2px solid var(--border-light);
  border-radius: 6px;
  background: #ffffff;
  color: var(--text-dark);
  transition: all var(--transition-normal);
  font-weight: 500;
  width: 100%;
}

.controls input:focus,
.controls select:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.2);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.controls button {
  padding: 10px 24px;
  font-size: 14px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  width: 100%;
}

.controls button::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width var(--transition-normal), height var(--transition-normal);
}

.controls button:hover {
  background: linear-gradient(135deg, var(--primary-dark), #d94f00);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.controls button:hover::after {
  width: 300px;
  height: 300px;
}

/* ==================== TABLE ====================*/
table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
  border-radius: 0;
  overflow: visible;
  margin: 0;
  margin-bottom: 30px;
  box-shadow: var(--shadow-md);
  animation: slideUp 0.5s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

th,
td {
  padding: 14px 12px;
  border: 1px solid var(--border-light);
  text-align: center;
  font-weight: 500;
  transition: all var(--transition-normal);
}

th {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: #fff;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.5px;
  user-select: none;
  position: sticky;
  top: 217px;
  z-index: 80;
}

th:hover {
  background: linear-gradient(135deg, var(--primary-dark), #d94f00);
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.2);
}

tr {
  transition: all var(--transition-fast);
}

tr:hover {
  background: linear-gradient(90deg, transparent, rgba(255, 102, 0, 0.08), transparent);
  box-shadow: inset 0 0 10px rgba(255, 102, 0, 0.1);
}

tbody tr {
  animation: fadeIn 0.3s ease forwards;
}

tbody tr:nth-child(even) {
  background-color: #fafafa;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ==================== DASHBOARD CONTROLS (CONTROL BOARD) ====================*/
#sectionBangDieuKhien > div {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 25px;
  margin: 30px 40px;
  padding: 0;
}

.dashboard-controls {
  background: linear-gradient(135deg, #ffffff, #f8f9fa);
  border: 3px solid var(--primary-color);
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15), 0 0 20px rgba(255, 102, 0, 0.15);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex !important;
  flex-direction: column !important;
  justify-content: center !important;
  align-items: center !important;
  gap: 0 !important;
  margin: 0 !important;
}

.dashboard-controls::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  animation: scanlines 2s ease-in-out infinite;
}

@keyframes scanlines {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.dashboard-controls:hover {
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2), 0 0 30px rgba(255, 102, 0, 0.3);
  transform: translateY(-5px);
}

.dashboard-controls h3 {
  color: var(--primary-color);
  margin: 0 0 20px 0;
  font-size: 20px;
  text-shadow: 0 0 10px rgba(255, 102, 0, 0.2);
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 15px;
  width: 100%;
  text-align: center;
}

.dashboard-controls > div {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.dashboard-controls > div > div:first-child {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.dashboard-controls > div > div:first-child > div:first-child {
  background: linear-gradient(135deg, rgba(255, 102, 0, 0.1), rgba(230, 92, 0, 0.05));
  border: 2px solid var(--primary-color);
  border-radius: 8px;
  padding: 15px 25px;
  text-align: center;
  width: 100%;
}

.dashboard-controls > div > div:first-child > div:first-child > div:first-child {
  color: var(--primary-color);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 1px;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.dashboard-controls img {
  border: 3px solid var(--primary-color);
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255, 102, 0, 0.08), rgba(230, 92, 0, 0.05));
  padding: 8px;
  box-shadow: 0 0 15px rgba(255, 102, 0, 0.2), inset 0 0 10px rgba(255, 102, 0, 0.05);
  transition: all var(--transition-normal);
  width: 120px;
  height: 120px;
}

.dashboard-controls img:hover {
  box-shadow: 0 0 25px rgba(255, 102, 0, 0.4), inset 0 0 15px rgba(255, 102, 0, 0.1);
  transform: scale(1.08);
}

.dashboard-controls button {
  padding: 14px 40px;
  font-size: 15px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: #fff;
  border: 2px solid var(--primary-color);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: 0 6px 20px rgba(255, 102, 0, 0.25);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  width: 100%;
}

.dashboard-controls button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.dashboard-controls button:hover {
  background: linear-gradient(135deg, var(--primary-dark), #d94f00);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(255, 102, 0, 0.4);
  text-shadow: 0 0 10px rgba(255, 102, 0, 0.5);
}

.dashboard-controls button:hover::before {
  left: 100%;
}

.dashboard-controls button:active {
  transform: translateY(-1px);
}

/* ==================== STATE LABELS ====================*/
#servoStateLabel,
#autoStateLabel {
  display: inline-block;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: #ffffff;
  font-weight: 700;
  font-size: 16px;
  border-radius: 8px;
  box-shadow: 0 6px 20px rgba(255, 102, 0, 0.25);
  min-width: 100px;
  text-align: center;
  transition: all var(--transition-normal);
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 2px solid var(--primary-color);
}

#servoStateLabel:hover,
#autoStateLabel:hover {
  transform: scale(1.1);
  box-shadow: 0 10px 30px rgba(255, 102, 0, 0.4);
  text-shadow: 0 0 10px rgba(255, 102, 0, 0.5);
}

/* ==================== SECTION STYLES ====================*/
#sectionHoSoTau {
  position: relative;
  animation: fadeIn 0.5s ease;
}

#sectionPhanTich,
#sectionBangDieuKhien {
  animation: fadeIn 0.5s ease;
}

/* ==================== MQTT STATUS SECTION ====================*/
.mqtt-status-section {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(245, 247, 250, 0.95));
  border-radius: 10px;
  padding: 15px 20px;
  margin-bottom: 25px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  border: 2px solid rgba(81, 184, 72, 0.2);
}

.mqtt-status-indicator {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: #2c3e50;
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #f39c12;
  animation: pulse 2s infinite;
  display: inline-block;
}

.status-dot.connected {
  background-color: #51b848;
  animation: none;
}

.status-dot.disconnected {
  background-color: #e74c3c;
  animation: none;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ==================== STATION CONTROLS CONTAINER ====================*/
#stationControlsContainer {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 20px;
  margin-bottom: 25px;
}

.station-control-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  border-left: 5px solid var(--primary-color);
  transition: all 0.3s ease;
}

.station-control-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.station-control-card h3 {
  color: var(--primary-color);
  margin-bottom: 20px;
  font-size: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 2px solid rgba(255, 102, 0, 0.2);
  padding-bottom: 10px;
}

.control-section {
  background: rgba(245, 247, 250, 0.5);
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 15px;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.control-section:last-child {
  margin-bottom: 0;
}

.control-section h4 {
  color: #2c3e50;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  font-weight: 600;
}

.control-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding: 10px;
  background: white;
  border-radius: 6px;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.control-status-label {
  font-size: 13px;
  color: #555;
}

.status-badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.status-badge.open {
  background-color: rgba(81, 184, 72, 0.2);
  color: #51b848;
}

.status-badge.closed {
  background-color: rgba(243, 156, 18, 0.2);
  color: #f39c12;
}

.control-button {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--primary-color), #ff8c00);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 14px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.control-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 102, 0, 0.3);
}

.control-button:active {
  transform: translateY(0);
}

.control-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==================== ANALYSIS SECTION ====================*/
.analysis-main-container {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 30px;
  margin: 20px auto;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
}

.analysis-filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 15px;
  margin-bottom: 30px;
  padding: 20px;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.filter-group {
  display: flex;
  flex-direction: column;
}

.filter-group label {
  font-weight: 600;
  margin-bottom: 8px;
  color: #2c3e50;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-group select,
.filter-group input[type="date"] {
  padding: 10px 12px;
  border: 2px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  transition: all 0.3s ease;
  background: white;
}

.filter-group select:hover,
.filter-group input[type="date"]:hover {
  border-color: var(--primary-color);
  box-shadow: 0 2px 8px rgba(255, 102, 0, 0.15);
}

.filter-group select:focus,
.filter-group input[type="date"]:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.1);
}

.btn-apply-filters {
  grid-column: 1 / -1;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--primary-color), #ff8c00);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 14px;
  text-transform: uppercase;
}

.btn-apply-filters:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 102, 0, 0.3);
}

.btn-apply-filters:active {
  transform: translateY(0);
}

.analysis-main-chart {
  background: white;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  margin-bottom: 30px;
}

.analysis-main-chart canvas {
  max-height: 400px;
}

/* ==================== DATA LOADING SECTION ====================*/
.data-loading-section {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(245, 247, 250, 0.95));
  border-radius: 10px;
  padding: 15px 20px;
  margin-bottom: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  border: 2px solid rgba(255, 102, 0, 0.2);
}

.data-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

#dataLoadingStatus {
  font-size: 14px;
  color: #2c3e50;
  font-weight: 500;
}

#dataCountDisplay {
  color: var(--primary-color);
  font-size: 16px;
}

.btn-load-more {
  padding: 10px 20px;
  background: linear-gradient(135deg, #51b848, #3a9230);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 13px;
  text-transform: uppercase;
  white-space: nowrap;
}

.btn-load-more:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(81, 184, 72, 0.3);
}

.btn-load-more:active {
  transform: translateY(0);
}

.btn-load-more:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ==================== STATION CHARTS SECTION ====================*/
.station-charts-section {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 30px;
  margin: 20px auto;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
}

.station-charts-section h2 {
  color: var(--primary-color);
  margin-bottom: 25px;
  font-size: 22px;
}

.station-charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(600px, 1fr));
  gap: 25px;
}

.station-chart-card {
  background: white;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border-left: 5px solid var(--primary-color);
}

.station-chart-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.station-chart-card h3 {
  color: #2c3e50;
  margin-bottom: 20px;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 2px solid rgba(255, 102, 0, 0.2);
  padding-bottom: 10px;
}

.station-chart-card canvas {
  max-height: 250px;
  margin-bottom: 20px;
}

.station-chart-subgrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.station-chart-item {
  background: rgba(245, 247, 250, 0.5);
  border-radius: 8px;
  padding: 10px;
  overflow: hidden;
}

.station-chart-item h4 {
  color: var(--primary-color);
  font-size: 13px;
  margin-bottom: 8px;
  text-transform: uppercase;
  font-weight: 600;
}

.station-chart-item canvas {
  max-height: 180px;
  margin: 0;
}

.chart-wrapper {
  position: relative !important;
  width: 100% !important;
  height: 250px !important;
  overflow: visible !important;
}
}

canvas {
  border-radius: 8px;
  transition: transform var(--transition-normal);
}

canvas:hover {
  transform: scale(1.01);
}

/* ==================== STATION SETTINGS FORM ====================*/
.station-settings-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: max-height var(--transition-normal), opacity var(--transition-normal);
  overflow: hidden;
  opacity: 1;
  animation: slideDown 0.3s ease;
  padding: 25px;
  background: white;
}

.station-settings-form.hidden {
  display: none;
  opacity: 0;
  max-height: 0;
  padding: 0;
}

.station-settings-form label {
  font-weight: 700;
  color: var(--primary-color);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.station-settings-form input[type="number"] {
  padding: 12px 14px;
  font-size: 14px;
  border-radius: 6px;
  border: 2px solid #ddd;
  background: #f9f9f9;
  color: var(--text-dark);
  transition: all var(--transition-normal);
  font-weight: 500;
}

.station-settings-form input[type="number"]::placeholder {
  color: rgba(0, 0, 0, 0.3);
}

.station-settings-form input[type="number"]:hover {
  border-color: var(--primary-color);
  background: white;
}

.station-settings-form input[type="number"]:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.15);
  border-color: var(--primary-color);
  background: white;
}

.station-settings-form button[type="submit"] {
  background: linear-gradient(135deg, var(--primary-color), #ff8c00);
  color: white;
  border: none;
  padding: 12px 30px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: 0 6px 20px rgba(255, 102, 0, 0.25);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  align-self: flex-start;
  white-space: nowrap;
}

.station-settings-form button[type="submit"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.station-settings-form button[type="submit"]:hover {
  background: linear-gradient(135deg, #ff8c00, var(--primary-color));
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 102, 0, 0.35);
}

.station-settings-form button[type="submit"]:hover::before {
  left: 100%;
}

.station-settings-form button[type="submit"]:active {
  transform: translateY(0);
}

/* ==================== COLLAPSIBLE CONTAINER ====================*/
.collapsible-container {
  background: linear-gradient(135deg, #ffffff 0%, #f5f7fa 100%);
  border: 2px solid var(--primary-color);
  border-radius: 12px;
  padding: 0;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1), 0 0 20px rgba(255, 102, 0, 0.1);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  margin-top: 25px;
}

.collapsible-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  animation: none;
}

.collapsible-container:hover {
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15), 0 0 30px rgba(255, 102, 0, 0.2);
  transform: translateY(-3px);
}

.toggle-form-btn {
  width: 100%;
  background: linear-gradient(135deg, var(--primary-color) 0%, #ff8c00 100%);
  color: white;
  border: none;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 10px 10px 0 0;
  cursor: pointer;
  margin-bottom: 0;
  transition: all var(--transition-normal);
  box-shadow: none;
  letter-spacing: 1px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toggle-form-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.toggle-form-btn:hover {
  background: linear-gradient(135deg, #ff8c00 0%, var(--primary-color) 100%);
  padding-left: 25px;
}

.toggle-form-btn::after {
  content: '▼';
  font-size: 12px;
  transition: transform 0.3s ease;
}

/* ==================== SETTINGS FORM ====================*/
#settingsForm {
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: max-height var(--transition-normal), opacity var(--transition-normal);
  overflow: hidden;
  opacity: 1;
  animation: slideDown 0.3s ease;
  padding: 25px;
  background: white;
}

@keyframes slideDown {
  from {
    opacity: 0;
    max-height: 0;
  }
  to {
    opacity: 1;
    max-height: 1000px;
  }
}

#settingsForm.hidden {
  display: none;
  opacity: 0;
  max-height: 0;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.settings-group {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

#settingsForm label {
  font-weight: 700;
  color: var(--primary-color);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

#settingsForm input[type="number"] {
  padding: 12px 14px;
  font-size: 14px;
  border-radius: 6px;
  border: 2px solid #ddd;
  background: #f9f9f9;
  color: var(--text-dark);
  transition: all var(--transition-normal);
  font-weight: 500;
}

#settingsForm input[type="number"]::placeholder {
  color: rgba(0, 0, 0, 0.3);
}

#settingsForm input[type="number"]:hover {
  border-color: var(--primary-color);
  background: white;
}

#settingsForm input[type="number"]:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.15);
  border-color: var(--primary-color);
  background: white;
}

#settingsForm button[type="submit"] {
  background: linear-gradient(135deg, var(--primary-color), #ff8c00);
  color: white;
  border: none;
  padding: 12px 30px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: 0 6px 20px rgba(255, 102, 0, 0.25);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  align-self: flex-start;
  white-space: nowrap;
}

#settingsForm button[type="submit"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

#settingsForm button[type="submit"]:hover {
  background: linear-gradient(135deg, #ff8c00, var(--primary-color));
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 102, 0, 0.35);
}

#settingsForm button[type="submit"]:hover::before {
  left: 100%;
}

#settingsForm button[type="submit"]:active {
  transform: translateY(0);
}

/* ==================== GENERAL TRANSITIONS ====================*/
button,
select,
input[type="text"],
input[type="date"],
input[type="time"] {
  transition: all var(--transition-normal);
}

/* ==================== FOCUS STATES ====================*/
.controls input:focus,
.controls select:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.2);
  border-color: var(--primary-color);
}

/* ==================== RESPONSIVE DESIGN ====================*/
@media (max-width: 1024px) {
  header {
    padding: 10px 20px;
    flex-direction: column;
    text-align: center;
    gap: 15px;
  }

  h1 {
    padding: 15px 40px;
    font-size: 22px;
  }

  .controls {
    gap: 8px;
    padding: 15px;
  }

  .controls input,
  .controls select,
  .controls button {
    min-width: 120px;
  }

  #sectionPhanTich > div {
    padding: 20px;
  }

  #sectionBangDieuKhien > div {
    grid-template-columns: 1fr;
    margin: 20px;
  }
}

@media (max-width: 768px) {
  .nav-bar {
    flex-direction: column;
  }

  .nav-bar button {
    width: 100%;
    border-right: none;
    border-left: 2px solid var(--primary-color);
  }

  h1 {
    padding: 12px 20px;
    font-size: 20px;
  }

  header .banner {
    font-size: 24px;
  }

  header .banner:nth-of-type(2) {
    font-size: 18px;
  }

  .controls {
    flex-direction: column;
    padding: 15px;
  }

  .controls input,
  .controls select,
  .controls button {
    width: 100%;
  }

  table {
    font-size: 12px;
  }

  th,
  td {
    padding: 8px 6px;
  }

  .dashboard-controls {
    padding: 20px !important;
  }

  .collapsible-container {
    padding: 20px;
    margin: 15px;
  }

  .station-charts-grid {
    grid-template-columns: 1fr;
  }

  .station-chart-subgrid {
    grid-template-columns: 1fr;
  }

  .station-chart-item {
    padding: 8px;
  }

  .chart-wrapper {
    height: 200px !important;
  }

  .station-control-card {
    padding: 15px;
  }

  .station-settings-form {
    padding: 15px;
  }

  .station-settings-form button[type="submit"] {
    padding: 10px 20px;
    font-size: 13px;
  }

  #sectionPhanTich > div {
    padding: 15px;
    margin: 15px;
  }
}

@media (max-width: 480px) {

  h1 {
    padding: 10px 15px;
    font-size: 18px;
  }

  header .banner {
    font-size: 20px;
  }

  header .banner:nth-of-type(2) {
    font-size: 16px;
  }

  table {
    font-size: 11px;
  }

  th,
  td {
    padding: 6px 4px;
  }

  .controls {
    padding: 10px;
    gap: 5px;
  }

  #servoStateLabel,
  #autoStateLabel {
    padding: 8px 12px;
    font-size: 14px;
  }

  .dashboard-controls {
    padding: 15px !important;
  }

  .dashboard-controls img {
    width: 100px;
    height: 100px;
  }
}
/* ==================== AI AGENT WIDGET ====================*/
.ai-agent-widget {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 380px;
  height: 500px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  z-index: 300;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  overflow: hidden;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ai-agent-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid #667eea;
}

.ai-agent-title {
  font-weight: 600;
  font-size: 16px;
}

.ai-toggle-btn {
  background: transparent;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease;
}

.ai-toggle-btn:hover {
  transform: scale(1.1);
}

.ai-toggle-btn.minimized {
  transform: rotate(180deg);
}

.ai-chat-container {
  flex: 1;
  overflow-y: auto;
  padding: 15px;
  background: #f8f9fa;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ai-messages {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ai-message {
  display: flex;
  flex-direction: column;
  animation: messageAppear 0.3s ease;
}

@keyframes messageAppear {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ai-message.user {
  align-items: flex-end;
}

.ai-message.ai {
  align-items: flex-start;
}

.ai-message-content {
  max-width: 85%;
  padding: 10px 12px;
  border-radius: 8px;
  word-wrap: break-word;
  font-size: 14px;
  line-height: 1.4;
}

.ai-message.user .ai-message-content {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-bottom-right-radius: 2px;
}

.ai-message.ai .ai-message-content {
  background: white;
  color: #333;
  border: 1px solid #e0e0e0;
  border-bottom-left-radius: 2px;
}

.ai-loading {
  display: flex;
  justify-content: center;
  padding: 10px;
}

.ai-spinner {
  border: 3px solid #f3f3f3;
  border-top: 3px solid #667eea;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  animation: spin 0.8s linear infinite;
}

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

.ai-input-section {
  display: flex;
  gap: 8px;
  padding: 12px;
  background: white;
  border-top: 1px solid #e0e0e0;
}

.ai-input {
  flex: 1;
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  transition: border-color 0.2s ease;
}

.ai-input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.ai-input:disabled {
  background: #f5f5f5;
  color: #999;
  cursor: not-allowed;
}

.ai-send-btn {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 0.2s ease;
}

.ai-send-btn:hover:not(:disabled) {
  transform: translateY(-2px);
}

.ai-send-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.ai-status {
  padding: 8px 12px;
  background: #f0f0f0;
  font-size: 12px;
  color: #666;
  border-top: 1px solid #e0e0e0;
  text-align: center;
}

.ai-status.ready {
  background: #e8f5e9;
  color: #2e7d32;
}

.ai-status.error {
  background: #ffebee;
  color: #c62828;
}

.ai-status.loading {
  background: #f3e5f5;
  color: #6a1b9a;
}

/* Scrollbar styling */
.ai-chat-container::-webkit-scrollbar {
  width: 6px;
}

.ai-chat-container::-webkit-scrollbar-track {
  background: transparent;
}

.ai-chat-container::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 3px;
}

.ai-chat-container::-webkit-scrollbar-thumb:hover {
  background: #999;
}

/* Minimized state */
.ai-agent-widget.minimized {
  height: auto;
}

.ai-agent-widget.minimized .ai-chat-container,
.ai-agent-widget.minimized .ai-input-section {
  display: none;
}

@media (max-width: 768px) {
  .ai-agent-widget {
    width: 320px;
    height: 400px;
    bottom: 10px;
    right: 10px;
  }
  
  .ai-message-content {
    max-width: 90%;
  }
}