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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --nav-bg: rgba(255, 255, 255, 0.95);
}

/* Dark mode colors */
[data-theme="dark"] {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #10b981;
    --text-dark: #f9fafb;
    --text-light: #d1d5db;
    --bg-light: #1f2937;
    --bg-white: #111827;
    --border-color: #374151;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    --nav-bg: rgba(17, 24, 39, 0.95);
}

/* Auto dark mode based on system preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --primary-color: #3b82f6;
        --primary-dark: #2563eb;
        --secondary-color: #10b981;
        --text-dark: #f9fafb;
        --text-light: #d1d5db;
        --bg-light: #1f2937;
        --bg-white: #111827;
        --border-color: #374151;
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
        --nav-bg: rgba(17, 24, 39, 0.95);
    }
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    transition: background-color 0.3s ease, color 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 40px;
    width: auto;
    transition: filter 0.3s ease;
}

/* Invert logo in dark mode */
[data-theme="dark"] .logo-img {
    filter: brightness(0) invert(1);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .logo-img {
        filter: brightness(0) invert(1);
    }
}

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

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: background-color 0.3s ease;
    color: var(--text-dark);
}

.theme-toggle:hover {
    background-color: var(--bg-light);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

/* Auto theme based on system preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .sun-icon {
        display: block;
    }
    
    :root:not([data-theme="light"]) .moon-icon {
        display: none;
    }
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 90vh;
    display: flex;
    align-items: center;
    transition: background 0.3s ease;
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #4c1d95 0%, #581c87 100%);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .hero {
        background: linear-gradient(135deg, #4c1d95 0%, #581c87 100%);
    }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

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

.hero-graphic {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: var(--bg-white);
    color: var(--text-dark);
    padding: 20px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    font-weight: 600;
    font-size: 1.1rem;
    animation: float 3s ease-in-out infinite;
    transition: background-color 0.3s ease, color 0.3s ease;
    border: 1px solid var(--border-color);
}

/* Ensure floating cards have proper contrast in dark mode */
[data-theme="dark"] .floating-card {
    background: var(--bg-white);
    color: var(--text-dark);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .floating-card {
        background: var(--bg-white);
        color: var(--text-dark);
    }
}

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

.card-2 {
    top: 50%;
    right: 10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 15%;
    left: 20%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
}

.lead {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* About Section */
.about {
    background-color: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-card {
    background: var(--bg-white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.stat-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

/* Product Section */
.product {
    background-color: var(--bg-white);
}

.product-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.feature-card {
    background: var(--bg-white);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
}

.product-cta {
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 40px;
    border-radius: 16px;
    color: white !important;
    transition: background 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.product-cta h3 {
    color: white !important;
    font-size: 2rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.product-cta .cta-subtitle,
.product-cta .cta-web-link {
    color: rgba(255, 255, 255, 0.95) !important;
}

[data-theme="dark"] .product-cta {
    background: linear-gradient(135deg, #4c1d95 0%, #581c87 100%);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .product-cta {
        background: linear-gradient(135deg, #4c1d95 0%, #581c87 100%);
    }
}

.product-cta h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta-subtitle {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.cta-web-link {
    font-size: 1rem;
    opacity: 0.9;
}

.cta-web-link a {
    color: white !important;
    text-decoration: underline;
    font-weight: 600;
    transition: opacity 0.3s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.cta-web-link a:hover {
    opacity: 0.8;
}

.btn-download {
    background: white;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
}

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

/* Values Section */
.values {
    background-color: var(--bg-light);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.value-card {
    background: var(--bg-white);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.value-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.value-card p {
    color: var(--text-light);
    line-height: 1.7;
}

.difference-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 40px;
    border-radius: 16px;
    color: white !important;
    text-align: center;
    transition: background 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.difference-section h3 {
    color: white !important;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.difference-section .lead {
    color: rgba(255, 255, 255, 0.95) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .difference-section {
    background: linear-gradient(135deg, #4c1d95 0%, #581c87 100%);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .difference-section {
        background: linear-gradient(135deg, #4c1d95 0%, #581c87 100%);
    }
}

.difference-section h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

/* Contact Section */
.contact {
    background-color: var(--bg-white);
}

.contact-content-centered {
    max-width: 900px;
    margin: 0 auto;
}

.contact-info-centered {
    text-align: center;
}

.contact-info-centered h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.contact-description {
    margin-bottom: 3rem;
    line-height: 1.8;
    color: var(--text-light);
    font-size: 1.1rem;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 2rem;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 10px;
    padding: 30px 20px;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-size: 1.1rem;
}

.contact-item p {
    color: var(--text-light);
    margin: 0;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
    font-weight: 500;
}

.contact-item a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Footer */
.footer {
    background-color: #1f2937;
    color: white;
    padding: 60px 0 30px;
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .footer {
    background-color: #0f172a;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .footer {
        background-color: #0f172a;
    }
}

.footer-logo {
    height: 50px;
    width: auto;
    margin-bottom: 1rem;
    filter: brightness(0) invert(1);
    transition: filter 0.3s ease;
}

/* Footer logo is already white, no need to change in dark mode */

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 1rem;
}

.social-link {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease, transform 0.3s ease;
    display: inline-block;
}

.social-link:hover {
    color: white;
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero-container,
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .hero-graphic {
        height: 300px;
    }

    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .logo-img {
        height: 32px;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 20px;
    }

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

    .hamburger {
        display: flex;
    }
    
    .theme-toggle {
        padding: 6px;
    }
    
    .theme-toggle svg {
        width: 20px;
        height: 20px;
    }

    .hero {
        padding: 100px 0 60px;
    }

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

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

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .features-grid,
    .values-grid {
        grid-template-columns: 1fr;
    }

    .download-buttons {
        flex-direction: column;
    }

    .contact-methods {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .logo-img {
        height: 28px;
    }

    .logo-text {
        font-size: 1rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .feature-card,
    .value-card,
    .stat-card {
        padding: 30px 20px;
    }

    .footer-logo {
        height: 40px;
    }
}