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

:root {
    /* Color System */
    --primary-50: #e0f2fe;
    --primary-100: #b3e5fc;
    --primary-500: #1976d2;
    --primary-600: #1565c0;
    --primary-700: #0d47a1;
    
    --secondary-50: #e8f5e8;
    --secondary-100: #c8e6c9;
    --secondary-500: #2e7d32;
    --secondary-600: #1b5e20;
    --secondary-700: #1b5e20;
    
    --accent-50: #e0f2f1;
    --accent-100: #b2dfdb;
    --accent-500: #00695c;
    --accent-600: #004d40;
    --accent-700: #00251a;
    
    --neutral-50: #fafafa;
    --neutral-100: #f5f5f5;
    --neutral-200: #e5e5e5;
    --neutral-300: #d4d4d4;
    --neutral-400: #a3a3a3;
    --neutral-500: #737373;
    --neutral-600: #525252;
    --neutral-700: #404040;
    --neutral-800: #262626;
    --neutral-900: #171717;
    
    --success-500: #16a34a;
    --warning-500: #ea580c;
    --error-500: #dc2626;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --line-height-body: 1.5;
    --line-height-heading: 1.2;
    
    /* Spacing System (8px base) */
    --space-1: 0.5rem;
    --space-2: 1rem;
    --space-3: 1.5rem;
    --space-4: 2rem;
    --space-5: 2.5rem;
    --space-6: 3rem;
    --space-8: 4rem;
    --space-10: 5rem;
    --space-12: 6rem;
    --space-16: 8rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-body);
    color: var(--neutral-700);
    background-color: var(--neutral-50);
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--neutral-200);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: var(--primary-600);
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.logo-icon {
    width: 40px;
    height: 40px;
    transition: transform 0.3s ease;
}

.logo-icon:hover {
    transform: rotate(10deg) scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-6);
}

.nav-link {
    text-decoration: none;
    color: var(--neutral-600);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-600);
}

.nav-link:hover::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-600);
    border-radius: var(--radius-sm);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--neutral-600);
    transition: all 0.3s ease;
    border-radius: var(--radius-sm);
}

/* Hero Section */
.hero {
    padding: calc(70px + var(--space-16)) var(--space-4) var(--space-16);
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--accent-50) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: var(--line-height-heading);
    color: var(--neutral-900);
    margin-bottom: var(--space-4);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--neutral-600);
    margin-bottom: var(--space-6);
    line-height: var(--line-height-body);
}

.hero-buttons {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.btn {
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-600);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--primary-700);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: white;
    color: var(--primary-600);
    border: 2px solid var(--primary-600);
}

.btn-secondary:hover {
    background: var(--primary-600);
    color: white;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-600);
    border: 2px solid var(--primary-600);
}

.btn-outline:hover {
    background: var(--primary-600);
    color: white;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-card {
    position: absolute;
    background: white;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    animation: float 3s ease-in-out infinite;
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 60%;
    right: 15%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20%;
    left: 25%;
    animation-delay: 2s;
}

.card-icon {
    font-size: 1.5rem;
}

.card-text {
    font-weight: 600;
    color: var(--neutral-700);
    font-size: 0.875rem;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: var(--space-3);
    line-height: var(--line-height-heading);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--neutral-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Products Section */
.products {
    padding: var(--space-16) 0;
    background: white;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--space-8);
}

.product-card {
    background: var(--neutral-50);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    border: 1px solid var(--neutral-200);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.product-icon {
    margin-bottom: var(--space-4);
}

.icon-circle {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: var(--space-4);
}

.product-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: var(--space-3);
}

.product-description {
    color: var(--neutral-600);
    margin-bottom: var(--space-4);
    line-height: var(--line-height-body);
}

.product-features {
    list-style: none;
}

.product-features li {
    padding: var(--space-2) 0;
    color: var(--neutral-700);
    position: relative;
    padding-left: var(--space-4);
}

.product-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-600);
    font-weight: 700;
}

.product-badge {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: var(--accent-500);
    color: white;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
}

/* Pricing Section */
.pricing {
    padding: var(--space-16) 0;
    background: var(--neutral-100);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    border: 2px solid var(--neutral-200);
    transition: all 0.3s ease;
    position: relative;
    text-align: center;
}

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

.pricing-card.featured {
    border-color: var(--primary-500);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-4px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-600);
    color: white;
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-header {
    margin-bottom: var(--space-6);
}

.pricing-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: var(--space-3);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.currency {
    font-size: 1.5rem;
    color: var(--neutral-600);
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--neutral-900);
}

.period {
    font-size: 1rem;
    color: var(--neutral-600);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--space-6);
    text-align: left;
}

.pricing-features li {
    padding: var(--space-2) 0;
    color: var(--neutral-700);
    border-bottom: 1px solid var(--neutral-100);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* Contact Section */
.contact {
    padding: var(--space-16) 0;
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.contact-info {
    padding: var(--space-4);
}

.contact-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: var(--space-6);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
    padding: var(--space-4);
    background: var(--neutral-50);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: var(--primary-50);
    transform: translateX(8px);
}

.contact-icon {
    font-size: 1.5rem;
    min-width: 40px;
}

.contact-details h4 {
    font-weight: 600;
    color: var(--neutral-900);
    margin-bottom: var(--space-1);
}

.contact-details p {
    color: var(--neutral-600);
}

/* Contact Form */
.contact-form {
    background: var(--neutral-50);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border: 1px solid var(--neutral-200);
}

.form-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: var(--space-6);
    text-align: center;
}

.form-group {
    margin-bottom: var(--space-4);
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--neutral-700);
    margin-bottom: var(--space-1);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-3);
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--neutral-900);
    color: var(--neutral-300);
    padding: var(--space-12) 0 var(--space-4);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: var(--space-3);
    font-weight: 600;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--space-2);
}

.footer-section a {
    color: var(--neutral-300);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--primary-400);
}

.footer-bottom {
    border-top: 1px solid var(--neutral-700);
    padding-top: var(--space-4);
    text-align: center;
    color: var(--neutral-400);
}

/* Mobile Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: var(--space-4) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-6);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        height: 300px;
    }

    .floating-card {
        position: relative;
        margin: var(--space-2);
        display: none;
    }

    .card-1 {
        display: flex;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-4px);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-6);
        text-align: center;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero {
        padding-top: calc(70px + var(--space-8));
        padding-bottom: var(--space-8);
        min-height: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-3);
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: var(--space-2) var(--space-4);
        font-size: 0.875rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }
}

/* Tablet Styles */
@media (min-width: 769px) and (max-width: 1024px) {
    .hero-container {
        gap: var(--space-6);
    }

    .hero-title {
        font-size: 3rem;
    }

    .products-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Form Validation States */
.form-group input.error,
.form-group textarea.error {
    border-color: var(--error-500);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group input.success,
.form-group textarea.success {
    border-color: var(--success-500);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.error-message {
    color: var(--error-500);
    font-size: 0.875rem;
    margin-top: var(--space-1);
}

.success-message {
    color: var(--success-500);
    font-size: 0.875rem;
    margin-top: var(--space-1);
}

/* Loading State */
.btn.loading {
    opacity: 0.7;
    cursor: not-allowed;
    position: relative;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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