/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* Page Header */
.page-header {
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #1e3a8a;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 600;
    color: #1e3a8a;
    margin: 0 0 5px 0;
}

.page-header p {
    font-size: 16px;
    color: #666;
    margin: 0;
}

/* Content Area */
.content-area {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr ));
    gap: 10px;
    margin-bottom: 20px;
}

/* Stat Cards */
.stat-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-left: 4px solid #1e3a8a;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.stat-card.success {
    border-left-color: #10b981;
}

.stat-card.danger {
    border-left-color: #ef4444;
}

.stat-card.warning {
    border-left-color: #f59e0b;
}

.stat-card.info {
    border-left-color: #3b82f6;
}

.stat-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.stat-card-title {
    font-size: 14px;
    font-weight: 500;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card-value {
    font-size: 32px;
    font-weight: 700;
    color: #1e3a8a;
    margin-top: 5px;
}

.stat-card-icon {
    font-size: 32px;
    opacity: 0.7;
}

.stat-card-footer {
    font-size: 12px;
    color: #999;
    margin-top: 10px;
}

/* Device Grid */
.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

/* Device Cards */
.device-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-left: 4px solid #1e3a8a;
    transition: all 0.3s ease;
}

.device-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.device-card.online {
    border-left-color: #10b981;
}

.device-card.offline {
    border-left-color: #ef4444;
    opacity: 0.8;
}

.device-card.warning {
    border-left-color: #f59e0b;
}

.device-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.device-name {
    font-size: 18px;
    font-weight: 600;
    color: #1e3a8a;
}

.device-status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.device-status-badge.online {
    background: #d1fae5;
    color: #065f46;
}

.device-status-badge.offline {
    background: #fee2e2;
    color: #991b1b;
}

/* Device Info */
.device-info {
    margin-bottom: 15px;
}

.device-info-item {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    font-size: 13px;
}

.device-info-label {
    color: #666;
    font-weight: 500;
}

.device-info-value {
    color: #333;
    font-weight: 600;
}

/* Temperature Display */
.temperature-display {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    margin: 15px 0;
}

.temperature-value {
    font-size: 28px;
    font-weight: 700;
}

.temperature-label {
    font-size: 12px;
    opacity: 0.9;
    margin-top: 5px;
}

/* Volume Bar */
.volume-bar {
    margin: 15px 0;
}

.volume-bar-label {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: #666;
    margin-bottom: 8px;
}

.volume-progress {
    width: 100%;
    height: 20px;
    background: #e5e7eb;
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.volume-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981 0%, #059669 100%);
    border-radius: 10px;
    transition: width 0.5s ease;
}

/* Component Status */
.component-status {
    display: flex;
    gap: 8px;
    margin: 15px 0;
    flex-wrap: wrap;
}

.component-badge {
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.component-badge.active {
    background: #d1fae5;
    color: #065f46;
}

.component-badge.inactive {
    background: #f3f4f6;
    color: #6b7280;
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.data-table th {
    background: #1e3a8a;
    color: white;
    padding: 12px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid #e5e7eb;
    font-size: 14px;
}

.data-table tr:hover {
    background: #f9fafb;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #1e3a8a;
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: #1e3a8a;
    color: white;
}

.btn-primary:hover {
    background: #1e40af;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: #6b7280;
    color: white;
}

.btn-secondary:hover {
    background: #4b5563;
}

.btn-success {
    background: #10b981;
    color: white;
}

.btn-success:hover {
    background: #059669;
}

.btn-danger {
    background: #ef4444;
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
    display: block;
}

/* Alerts */
.alert {
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: #d1fae5;
    border-color: #10b981;
    color: #065f46;
}

.alert-danger {
    background: #fee2e2;
    border-color: #ef4444;
    color: #991b1b;
}

.alert-warning {
    background: #fef3c7;
    border-color: #f59e0b;
    color: #92400e;
}

.alert-info {
    background: #dbeafe;
    border-color: #3b82f6;
    color: #1e40af;
}

/* Loading Spinner */
.spinner-border {
    width: 2rem;
    height: 2rem;
    border: 0.25em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border 0.75s linear infinite;
}

@keyframes spinner-border {
    to { transform: rotate(360deg); }
}

/* Text Utilities */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-muted {
    color: #6b7280;
}

/* Spacing Utilities */
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

/* Responsive */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .device-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header h1 {
        font-size: 24px;
    }
}

/* Page Container */
.page-container {
    display: flex;
    min-height: 100vh;
    background-color: #f5f5f5;
}

.main-content {
    flex: 1;
    padding: 20px;
    margin-left: 250px;
    transition: margin-left 0.3s ease;
}

@media (max-width: 768px) {
    .main-content {
        margin-left: 0;
    }
}

/* Navigation Menu */
.nav-menu {
    width: 250px;
    background: linear-gradient(180deg, #1e3a8a 0%, #1e40af 100%);
    color: white;
    height: 100vh;
    position: fixed;
    padding:10px;
    left: 0px;
    top:175px;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0,0,0,0.2);
    z-index: 1000;
}

.nav-menu-header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.nav-menu-logo {
    font-size: 48px;
    margin-bottom: 10px;
}

.nav-menu-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}

.nav-menu-subtitle {
    font-size: 12px;
    opacity: 0.8;
    margin: 5px 0 0 0;
}

.nav-menu-items {
    padding: 20px 0;
}

.nav-item {
    display: block;
    padding: 12px 20px;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255,255,255,0.1);
    border-left-color: white;
    padding-left: 25px;
    color: white;
}

.nav-item.active {
    background: rgba(255,255,255,0.15);
    border-left-color: white;
    font-weight: 600;
}

.nav-item-icon {
    margin-right: 10px;
    font-size: 18px;
}

/* Sidebar (alias for nav-menu) */
.sidebar {
    width: 250px;
    background: linear-gradient(180deg, #1e3a8a 0%, #1e40af 100%);
    color: white;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
}

.sidebar-header {
    padding: 10px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo {
    font-size: 48px;
    margin-bottom: 10px;
}

.sidebar-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    background: #1e3a8a;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-menu {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .nav-menu.open {
        transform: translateX(0);
    }

    .menu-toggle {
        display: block;
    }
    .sidebar {
        width: 70px;
    }

    .nav-text {
        display: none; /* Hide text, show only icons */
    }

    .nav-icon {
        margin-right: 0;
    }
}

/* Visually Hidden (for accessibility) */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}