/* Global Styles */
:root {
    --primary-color: #2c3e50;      /* Dark blue-gray */
    --secondary-color: #34495e;    /* Darker blue-gray */
    --accent-color: #3498db;       /* Professional blue */
    --light-color: #f8f9fa;        /* Light gray/white */
    --dark-color: #2c3e50;         /* Dark blue-gray (same as primary) */
    --success-color: #27ae60;      /* Professional green */
    --info-color: #3498db;         /* Professional blue (same as accent) */
    --warning-color: #f39c12;      /* Professional amber */
    --danger-color: #e74c3c;       /* Professional red */
}

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

/* Navigation Styles */
.navbar-brand {
    font-size: 1.5rem;
    letter-spacing: 1px;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: #fff;
}

.navbar-dark .navbar-nav .nav-link.active {
    color: #fff;
    border-bottom: 2px solid #fff;
}

/* Hero Section */
.hero-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--light-color) 0%, #e9ecef 100%);
}

.hero-section h1 {
    color: var(--dark-color);
    font-weight: 700;
}

.hero-section p {
    color: #495057;
    font-size: 1.1rem;
}

/* Features Section */
.features .card {
    border: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-radius: 0.5rem;
}

.features .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
}

/* Calculator Section */
.calculator .card {
    border: none;
    border-radius: 0.5rem;
    overflow: hidden;
}

.calculator .card-header {
    background-color: var(--primary-color);
    padding: 1rem 1.5rem;
}

.calculator .form-label {
    font-weight: 500;
    color: #495057;
}

.calculator .btn-primary {
    padding: 0.75rem 2rem;
    font-weight: 600;
}

/* Insights Section */
.insights h3 {
    color: var(--primary-color);
    font-weight: 600;
}

.insights ul {
    padding-left: 1.25rem;
}

.insights li {
    margin-bottom: 0.5rem;
}

/* FAQ Section */
.faq .accordion-button:not(.collapsed) {
    background-color: var(--light-color);
    color: var(--primary-color);
    font-weight: 600;
}

.faq .accordion-button:focus {
    box-shadow: none;
    border-color: rgba(0, 0, 0, 0.125);
}

.faq .accordion-item {
    border-radius: 0.25rem;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

/* Footer Styles */
.footer {
    background-color: var(--dark-color);
}

.footer h3 {
    margin-bottom: 1.25rem;
    font-weight: 600;
}

.footer a {
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.footer a:hover {
    opacity: 0.8;
}

.footer .social-icons a {
    font-size: 1.25rem;
}

.footer hr {
    opacity: 0.1;
}

/* Results Card */
#resultsCard {
    transition: all 0.3s ease;
}

#resultsCard .card-header {
    background: linear-gradient(135deg, #4cc9f0 0%, #4895ef 100%);
}

/* Responsive Tweaks */
@media (max-width: 768px) {
    .hero-section {
        padding: 3rem 0;
        text-align: center;
    }

    .hero-section img {
        margin-top: 2rem;
    }

    .features .card {
        margin-bottom: 1.5rem;
    }
}

/* Chart Styling */
canvas {
    max-width: 100%;
    height: auto !important;
}

/* Custom Animation Classes */
.fade-in {
    animation: fadeIn 1s ease;
}

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

.slide-up {
    animation: slideUp 0.5s ease;
}

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