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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #059669;
    --background-color: #ffffff;
    --surface-color: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 10px 15px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 8rem 1rem 4rem;
    max-width: 1200px;
    margin: 0 auto;
    min-height: 80vh;
    align-items: center;
}

.hero-content {
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: var(--shadow-medium);
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.hero-image img {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 1rem;
    box-shadow: var(--shadow-large);
}

/* Features Section */
.features {
    padding: 4rem 0;
    background: var(--surface-color);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-large);
}

.feature-icon {
    width: 4rem;
    height: 4rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
}

/* Gallery Section */
.gallery {
    padding: 4rem 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.gallery-item {
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* Calculator Section */
.calculator-section {
    padding: 4rem 0;
    background: var(--surface-color);
}

.calculator-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-large);
}

.calculator-form {
    margin-bottom: 2rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

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

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.calculate-button {
    width: 100%;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.calculate-button:hover {
    background: var(--primary-dark);
}

.calculate-button:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
}

/* Results */
.results-container {
    border-top: 2px solid var(--border-color);
    padding-top: 2rem;
}

.result-card {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 1rem;
}

.result-amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.result-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.result-details p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.result-details span {
    font-weight: 600;
    color: var(--text-primary);
}

.result-disclaimer {
    background: #fef3c7;
    padding: 1rem;
    border-radius: var(--border-radius);
    border-left: 4px solid #f59e0b;
}

.result-disclaimer p {
    color: #92400e;
    font-size: 0.9rem;
}

/* Contact Section */
.contact-section {
    padding: 4rem 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.contact-info p {
    margin-bottom: 2rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.contact-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-primary);
}

.contact-feature i {
    color: var(--accent-color);
    font-size: 1.2rem;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-large);
}

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 0.2rem;
}

.checkbox-group label {
    font-weight: normal;
    margin-bottom: 0;
    font-size: 0.9rem;
}

.submit-button {
    width: 100%;
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.submit-button:hover {
    background: #047857;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0 2rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-brand i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.footer-links p {
    margin-bottom: 1rem;
    color: #cbd5e1;
}

.footer-disclaimer {
    font-size: 0.9rem;
    line-height: 1.5;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #9ca3af;
}

.footer-bottom a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* Success Message */
.success-message {
    background: #dcfce7;
    color: #166534;
    padding: 1rem;
    border-radius: var(--border-radius);
    border-left: 4px solid #22c55e;
    margin-bottom: 1rem;
    display: none;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .nav-link {
        font-size: 0.9rem;
    }
    
    .calculator-container,
    .contact-form {
        padding: 1.5rem;
    }
    
    .result-amount {
        font-size: 2.5rem;
    }
    
    .result-details {
        grid-template-columns: 1fr;
    }
}

/* Tablet and Desktop */
@media (min-width: 768px) {
    .hero {
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }
    
    .hero-content {
        text-align: left;
    }
    
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr 1.5fr;
    }
    
    .contact-features {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
    
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading states */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}