:root {
    --primary-color: #2c3e50;
    --primary-dark: #2980b9;
    --secondary-color: #3498db;
    --background-color: #ecf0f1;
    --text-color: #34495e;
    --card-background: #ffffff;
    --border-radius: 8px;
    --box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --header-height: 40px;
    --sidebar-width: 170px;
    --border-color: #dddddd;
}

.dark-mode {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #34495e;
    --background-color: #1a1a1a;
    --text-color: #f4f4f4;
    --card-background: #2c2c2c;
    --border-color: #555555;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    transition: var(--transition);
    font-size: 14px;
}

/* Header and Sidebar Styles */
#header {
    height: var(--header-height);
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    box-shadow: var(--box-shadow);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

#menu-toggle {
    cursor: pointer;
    font-size: 20px;
}

#sidebar {
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background-color: var(--primary-color);
    position: fixed;
    top: var(--header-height);
    left: calc(var(--sidebar-width) * -1);
    transition: left 0.3s ease;
    z-index: 999;
    box-shadow: var(--box-shadow);
    overflow-y: auto;
}

#sidebar.open {
    left: 0;
}

#sidebar-content {
    padding: 15px;
}

.sidebar-btn {
    display: block;
    width: 100%;
    margin-bottom: 4px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    text-align: left;
    transition: background-color 0.3s ease;
    text-decoration: none;
    font-size: 14px;
    padding: 8px 12px;
}

.sidebar-btn:hover {
    background-color: var(--primary-dark);
}

/* Main Content Styles */
.content {
    margin-left: 0;
    padding: 15px;
    transition: margin-left 0.3s ease;
    margin-top: var(--header-height);
}

.container {
    display: grid;
    gap: 15px;
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--card-background);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* Application Specific Styles */
h1, h2, h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

h1 {
    font-size: 28px;
    text-align: center;
}

h2 {
    font-size: 20px;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
    margin-top: 30px;
}

h3 {
    font-size: 18px;
    color: var(--secondary-color);
}

select, input {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    font-size: 16px;
    background-color: var(--card-background);
    color: var(--text-color);
}

.info-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(3, 1fr);
}

.info-card {
    background-color: var(--card-background);
    border-left: 5px solid var(--secondary-color);
    padding: 15px;
    border-radius: 5px;
    box-shadow: var(--box-shadow);
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    font-size: 14px;
}

th, td {
    border: 1px solid var(--border-color);
    padding: 10px;
    text-align: left;
}

th {
    background-color: var(--secondary-color);
    color: white;
}

.hidden {
    display: none;
}

/* Enhanced Popup Styles from Template */
.popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--card-background);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    z-index: 1001;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.popup.active {
    display: block;
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.popup-content {
    margin-bottom: 20px;
}

.popup h2 {
    margin-bottom: 15px;
    color: var(--primary-color);
    font-size: 24px;
}

.close-popup {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.close-popup:hover {
    color: var(--primary-color);
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.overlay.active {
    display: block;
    opacity: 1;
}

.input-group {
    margin-bottom: 12px;
}

.input-group label {
    display: block;
    margin-bottom: 4px;
    font-weight: bold;
}

textarea {
    resize: vertical;
    min-height: 80px;
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    background-color: var(--card-background);
    color: var(--text-color);
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-toggle {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: 0.4s;
    border-radius: 24px;
}

.slider-toggle:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .slider-toggle {
    background-color: var(--primary-color);
}

input:checked + .slider-toggle:before {
    transform: translateX(26px);
}

button[type="submit"] {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 12px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
    width: 100%;
}

button[type="submit"]:hover {
    background-color: var(--primary-dark);
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
        grid-template-columns: 1fr;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 24px;
    }

    .popup {
        padding: 20px;
        width: 95%;
    }
}