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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
}

.section-description {
    font-size: 1.125rem;
    color: #666;
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* Header and Navigation */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: #667eea;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

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

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #667eea;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #667eea;
    transition: width 0.3s ease;
}

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.btn-download {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(17, 153, 142, 0.4);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(17, 153, 142, 0.6);
}

.btn-disabled {
    background: #e0e0e0;
    color: #999;
    cursor: not-allowed;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-app-showcase {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    justify-content: center;
}

.hero-app-icon {
    width: 80px;
    height: 80px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: float 3s ease-in-out infinite;
}

.app-badges {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
}

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

.hero-description {
    font-size: 1.25rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
}

.stat-label {
    font-size: 0.875rem;
    color: #666;
    margin-top: 0.25rem;
}

/* Phone Mockup */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: #333;
    border-radius: 30px;
    padding: 20px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #667eea, #764ba2);
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

.app-preview {
    padding: 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.app-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.app-icon-small {
    width: 24px;
    height: 24px;
    border-radius: 4px;
}

.app-title {
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
}

.camera-view {
    width: 200px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    margin-bottom: 2rem;
    position: relative;
    backdrop-filter: blur(10px);
}

.color-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.2);
    padding: 1rem 1.5rem;
    border-radius: 25px;
    color: white;
    font-weight: 600;
}

.color-circle {
    width: 30px;
    height: 30px;
    background: #4285f4;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(66, 133, 244, 0.5);
}

/* Features Section */
.features {
    padding: 80px 0;
    background: white;
}

.section-header {
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

.feature-description {
    color: #666;
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 80px 0;
    background: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-description {
    font-size: 1.125rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.tech-stack,
.colorblind-types {
    margin-bottom: 2rem;
}

.tech-stack h3,
.colorblind-types h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-item {
    background: #667eea;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.types-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.type-item {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    font-size: 0.875rem;
}

.performance-metrics {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.performance-metrics h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #333;
}

.metric {
    margin-bottom: 1.5rem;
}

.metric-label {
    font-size: 0.875rem;
    color: #666;
    margin-bottom: 0.5rem;
    display: block;
}

.metric-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.metric-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.metric-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: #667eea;
}

/* Download Section */
.download {
    padding: 80px 0;
    background: white;
}

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

.download-description {
    font-size: 1.125rem;
    color: #666;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.download-features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.download-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #11998e;
    font-weight: 500;
}

.download-feature i {
    color: #11998e;
}

.download-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.download-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
}

.download-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 2.5rem;
    position: relative;
    overflow: hidden;
}

.download-app-icon {
    width: 50px;
    height: 50px;
    border-radius: 8px;
}

.download-details h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #333;
}

.download-details p {
    color: #666;
    margin-bottom: 0.25rem;
}

.requirements {
    font-size: 0.875rem;
    color: #999;
    margin-bottom: 1.5rem !important;
}

.installation-guide {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.installation-guide h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
    text-align: center;
}

.installation-guide ol {
    color: #666;
    line-height: 1.8;
}

.installation-guide li {
    margin-bottom: 0.5rem;
}

.installation-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1.5rem;
}

.option-column {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
}

.option-column h4 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.option-column ol {
    margin-bottom: 1rem;
}

.option-note {
    font-size: 0.875rem;
    font-weight: 600;
    margin: 0;
    padding: 0.5rem;
    border-radius: 5px;
    text-align: center;
}

.option-column:first-child .option-note {
    background: #d4edda;
    color: #155724;
}

.option-column:last-child .option-note {
    background: #fff3cd;
    color: #856404;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #667eea;
}

.footer-description {
    color: #bdc3c7;
    line-height: 1.6;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #667eea;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: #34495e;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #667eea;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        text-align: center;
        padding: 2rem 0;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

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

    .hero-app-showcase {
        flex-direction: column;
        gap: 1rem;
    }

    .app-badges {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

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

    .types-grid {
        grid-template-columns: 1fr;
    }

    .download-buttons {
        grid-template-columns: 1fr;
    }
    
    .installation-options {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .phone-mockup {
        width: 250px;
        height: 500px;
    }

    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .tech-items {
        justify-content: center;
    }

    .download-features {
        flex-direction: column;
        align-items: center;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.download-card {
    animation: fadeInUp 0.6s ease forwards;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.nav-link:focus,
.social-link:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}