/* ===== Base Styles ===== */
:root {
    --primary-color: #4a6fa5;
    --primary-light: #6a8cc9;
    --primary-dark: #345284;
    --accent-color: #ff9800;
    --accent-light: #ffb74d;
    --accent-dark: #f57c00;
    --text-dark: #333;
    --text-light: #f8f9fa;
    --bg-light: #f8f9fa;
    --bg-dark: #212529;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --border-radius: 8px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-light);
}

/* === Page Header === */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 3rem 0;
    margin-bottom: 2rem;
    text-align: left; /* Changed from center to left */
}
.page-header h1 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-align: left; /* Ensure left alignment */
}
.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 800px; /* Increased from 600px */
    text-align: left; /* Ensure left alignment */
}

/* ===== Layout & Container ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

section {
    margin-bottom: 2rem;
}

/* ===== Cards ===== */
.card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.card-header {
    background-color: var(--gray-100);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.25rem;
    color: var(--primary-dark);
    margin: 0;
}

.card-body {
    padding: 1.5rem;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
}

.form-text {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    margin: -0.5rem;
}

.form-row .form-group {
    flex: 1;
    padding: 0.5rem;
    min-width: 200px;
}

.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '▼';
    font-size: 0.8rem;
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
    pointer-events: none;
}

select.form-control {
    appearance: none;
    padding-right: 2.5rem;
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

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

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

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

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--gray-400);
    color: var(--gray-700);
}

.btn-outline:hover {
    background-color: var(--gray-100);
    border-color: var(--gray-500);
}

/* ===== Chart Section ===== */
.visualization {
    margin-top: 2rem;
}

.chart-container {
    width: 100%;
    height: 400px;
    position: relative;
}

/* Info Button */
.chart-info {
    display: flex;
    align-items: center;
}

.info-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: transform 0.2s ease;
}

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

.info-icon {
    font-size: 1.2rem;
}

/* Tooltip */
.tooltip {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 500px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.tooltip.active {
    opacity: 1;
    visibility: visible;
}

.tooltip-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
    background-color: var(--primary-light);
    color: white;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

.tooltip-header h3 {
    font-size: 1.1rem;
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    color: white;
    cursor: pointer;
}

.tooltip-content {
    padding: 1.5rem;
    max-height: 300px;
    overflow-y: auto;
}

.tooltip-content p {
    margin-bottom: 1rem;
}

.tooltip-content ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

/* ===== Analysis Section ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-item {
    background-color: var(--gray-100);
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.analysis-text {
    background-color: var(--gray-100);
    padding: 1.25rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

/* ===== Resources Section ===== */
.resources-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .resources-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.resource-item {
    background-color: var(--gray-100);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-color);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.resource-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--accent-dark);
}

.resource-item p {
    color: var(--gray-700);
    margin-bottom: 1rem;
    flex-grow: 1;
}

.resource-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.resource-link:hover {
    color: var(--primary-dark);
}

.arrow {
    margin-left: 0.25rem;
    transition: transform 0.2s ease;
}

.resource-link:hover .arrow {
    transform: translateX(3px);
    color: var(--primary-dark);
}

/* ===== Utilities ===== */
.hidden {
    display: none;
}

/* ===== Responsive Adjustments ===== */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }

    nav li {
        margin: 0.5rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .chart-container {
        height: 300px;
    }
}