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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --border-color: #bdc3c7;
    --shadow: 0 2px 5px rgba(0,0,0,0.1);
    --border-radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background-color: #f5f6fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    margin-bottom: 1px;
}

header h1 {
    font-size: 1.5rem;
    text-align: center;
}

/* Navigation */
.main-nav ul {
    list-style: none;
    display: flex;
    background: white;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.main-nav li {
    flex: 1;
    text-align: center;
    border-right: 1px solid var(--border-color);
}

.main-nav li:last-child {
    border-right: none;
}

.main-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 15px 10px;
    color: var(--dark-text);
    text-decoration: none;
    transition: background-color 0.3s;
}

.main-nav li.active a {
    background-color: var(--secondary-color);
    color: white;
}

.main-nav li:not(.active) a:hover {
    background-color: var(--light-bg);
}

.main-nav .icon {
    width: 24px;
    height: 24px;
    margin-bottom: 5px;
}

.main-nav .icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

/* Main Content */
main {
    flex: 1;
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    margin: 20px 0;
    box-shadow: var(--shadow);
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.home-icon {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--primary-color);
    padding: 10px 20px;
    border-radius: var(--border-radius);
    transition: background-color 0.3s;
}

.home-icon:hover {
    background-color: var(--light-bg);
}

.home-icon .icon {
    width: 32px;
    height: 32px;
    margin-bottom: 5px;
}

.home-icon .icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

/* Dashboard Cards */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.card {
    background: var(--light-bg);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.card ul {
    list-style: none;
}

.card li {
    margin-bottom: 10px;
}

.card a {
    color: var(--secondary-color);
    text-decoration: none;
}

.card a:hover {
    text-decoration: underline;
}

/* Filters */
.filters {
    margin: 20px 0;
    padding: 15px;
    background: var(--light-bg);
    border-radius: var(--border-radius);
}

.filter-form {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: flex-end;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.filter-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    font-size: 0.9rem;
}

.filter-group select,
.filter-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.btn-filter {
    padding: 10px 20px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.btn-filter:hover {
    background: #2980b9;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    margin: 20px 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover {
    background: var(--light-bg);
}

.data-table tr.unacknowledged {
    background-color: rgba(231, 76, 60, 0.1);
    font-weight: bold;
}

.data-table tr.unacknowledged:hover {
    background-color: rgba(231, 76, 60, 0.15);
}

.no-data {
    text-align: center;
    color: #999;
    padding: 40px !important;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.alert.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Statistics */
.chart-container {
    position: relative;
    height: 400px;
    margin: 20px 0;
}

.stats-summary {
    margin-top: 30px;
}

.stats-summary h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--light-bg);
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
}

.stat-card h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--secondary-color);
}

/* Forms */
.settings-form-container {
    max-width: 600px;
    margin: 0 auto;
}

.settings-form {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--primary-color);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-group input:disabled {
    background: var(--light-bg);
    cursor: not-allowed;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #666;
    font-size: 0.8rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: normal;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 30px;
}

.btn-primary,
.btn-secondary {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    flex: 1;
}

.btn-primary {
    background: var(--secondary-color);
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-secondary {
    background: var(--light-bg);
    color: var(--dark-text);
}

.btn-secondary:hover {
    background: var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .main-nav ul {
        flex-direction: column;
    }
    
    .main-nav li {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .main-nav li:last-child {
        border-bottom: none;
    }
    
    .main-nav a {
        flex-direction: row;
        gap: 10px;
    }
    
    .main-nav .icon {
        margin-bottom: 0;
    }
    
    .filter-form {
        flex-direction: column;
    }
    
    .filter-group {
        width: 100%;
    }
    
    .btn-filter {
        width: 100%;
    }
    
    .data-table th,
    .data-table td {
        padding: 8px 10px;
        font-size: 0.9rem;
    }
    
    .chart-container {
        height: 300px;
    }
    
    .summary-cards {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.2rem;
    }
    
    .data-table {
        font-size: 0.85rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 6px 8px;
    }
    
    .chart-container {
        height: 250px;
    }
}