/* Global Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --text-color: #333;
    --border-radius: 5px;
    --box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f8f9fa;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

h1, h2, h3, h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

p {
    margin-bottom: 1rem;
}

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

a:hover {
    text-decoration: underline;
}

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

.btn:hover {
    background-color: #2980b9;
    text-decoration: none;
}

.section {
    padding: 3rem 0;
    border-bottom: 1px solid #e6e6e6;
}

/* Header Styles */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: white;
}

header h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--light-color);
}

header .subtitle {
    font-size: 1.2rem;
    color: var(--light-color);
    opacity: 0.8;
}

/* Navigation Styles */
nav {
    background-color: white;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav ul {
    display: flex;
    list-style: none;
    overflow-x: auto;
}

nav li {
    flex: 0 0 auto;
}

nav a {
    display: block;
    padding: 1rem;
    color: var(--primary-color);
    font-weight: 500;
    transition: all 0.3s;
}

nav a:hover, nav a.active {
    background-color: var(--light-color);
    color: var(--secondary-color);
    text-decoration: none;
}

/* Card Styles */
.card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.highlight-card {
    border-left: 4px solid var(--secondary-color);
}

.card-content {
    font-size: 1.1rem;
}

/* Stats Container */
.stats-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-box {
    flex: 1;
    min-width: 200px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    text-align: center;
}

.stat-box.highlight {
    background-color: var(--secondary-color);
    color: white;
}

.stat-box.highlight h3 {
    color: white;
}

.stat {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 1rem 0;
}

/* Info Columns */
.info-columns {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin: 2rem 0;
}

.column {
    flex: 1;
    min-width: 250px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
}

.column h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
}

.column ul {
    margin-left: 1.5rem;
}

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

/* Benefit Cards */
.benefit-card {
    display: flex;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.benefit-card .icon {
    flex: 0 0 80px;
    height: 80px;
    background-color: var(--light-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1.5rem;
}

.benefit-card .icon i {
    font-size: 2rem;
    color: var(--secondary-color);
}

.benefit-card .content {
    flex: 1;
}

.benefit-card h3 {
    margin-bottom: 0.5rem;
}

/* Tabs */
.tabs {
    display: flex;
    margin-bottom: 1rem;
    overflow-x: auto;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--light-color);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s;
}

.tab-btn:first-child {
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

.tab-btn:last-child {
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

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

.tab-content {
    display: none;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
}

.tab-content.active {
    display: block;
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.grid-item {
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.grid-item h4 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

/* Calculator */
.calculator-container {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.calculator-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.input-group input, .input-group select {
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.calculator-results {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.result-card {
    flex: 1;
    min-width: 250px;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.result-card.highlight-card {
    background-color: var(--secondary-color);
    color: white;
}

.result-card.highlight-card h3 {
    color: white;
}

.result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.result-item.highlight {
    font-weight: bold;
    font-size: 1.1rem;
}

.savings-summary {
    margin-top: 2rem;
    text-align: center;
}

.savings-amount {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--success-color);
    margin: 1rem 0;
}

.savings-projection {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1.2rem;
}

/* Considerations */
.considerations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.consideration-item {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
}

.consideration-item .icon {
    width: 60px;
    height: 60px;
    background-color: var(--light-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.consideration-item .icon i {
    font-size: 1.5rem;
    color: var(--warning-color);
}

/* Recommendations */
.recommendations-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.recommendation {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
}

.recommendation h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.conclusion-card {
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 2rem;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    header h2 {
        font-size: 1.5rem;
    }
    
    .benefit-card {
        flex-direction: column;
        text-align: center;
    }
    
    .benefit-card .icon {
        margin-right: 0;
        margin-bottom: 1rem;
    }
    
    .calculator-inputs {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .stats-container, .info-columns {
        flex-direction: column;
    }
    
    .consideration-item, .recommendation {
        text-align: center;
    }
    
    .consideration-item .icon {
        margin: 0 auto 1rem;
    }
    
    .recommendation h3 {
        justify-content: center;
    }
}