/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #1e293b;
    background: linear-gradient(135deg, #e6fffa 0%, #f0f9ff 50%, #f8fafc 100%);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(34, 197, 94, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(6, 182, 212, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Glass morphism utility class */
.glass-card {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 8px 32px rgba(6, 182, 212, 0.15), 0 4px 16px rgba(34, 197, 94, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(6, 182, 212, 0.25), 0 8px 24px rgba(34, 197, 94, 0.15);
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.35);
}

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

/* Navigation */
.nav-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(6, 182, 212, 0.1);
    box-shadow: 0 2px 20px rgba(6, 182, 212, 0.1);
}

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

.logo h2 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(45deg, #059669, #0891b2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: #475569;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: #059669;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(45deg, #059669, #0891b2);
    transition: width 0.3s ease;
}

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

.nav-links a.active {
    color: #059669;
    font-weight: 600;
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: #475569;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 6rem;
    background: #ffffff;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.7;
    animation: float 8s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(34, 197, 94, 0.3) 0%, rgba(16, 185, 129, 0.1) 100%);
    top: 10%;
    left: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.4) 0%, rgba(14, 165, 233, 0.2) 100%);
    top: 60%;
    right: -5%;
    animation-delay: 2s;
}

.orb-3 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(52, 211, 153, 0.3) 0%, rgba(34, 197, 94, 0.1) 100%);
    bottom: -20%;
    left: 50%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(20px, -20px) rotate(90deg); }
    50% { transform: translate(-10px, 10px) rotate(180deg); }
    75% { transform: translate(-20px, -10px) rotate(270deg); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-card {
    padding: 3rem;
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: #1e293b;
}

.highlight {
    background: linear-gradient(45deg, #059669, #0891b2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    line-height: 1.6;
    color: #64748b;
    margin-bottom: 2.5rem;
}

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

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    border-radius: 50px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(45deg, #059669, #0891b2);
    color: #ffffff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(5, 150, 105, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.6);
    color: #475569;
    border: 1px solid rgba(6, 182, 212, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
    border-color: rgba(5, 150, 105, 0.5);
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
}

.app-demo-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 15px;
    object-fit: cover;
}



/* Section Styles */
section {
    padding: 8rem 0;
}

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

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #1e293b, #475569);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    background: rgba(255, 255, 255, 0.3);
}

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

.feature-card {
    padding: 2.5rem;
    text-align: center;
    position: relative;
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(45deg, #059669, #0891b2);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* SVG Icon Styling */
.feature-icon svg {
    width: 50px;
    height: 50px;
    transition: all 0.3s ease;
    filter: drop-shadow(0 2px 4px rgba(255, 255, 255, 0.2));
}

.feature-card:hover .feature-icon svg {
    transform: scale(1.1);
    filter: drop-shadow(0 4px 8px rgba(255, 255, 255, 0.3));
}

/* Individual icon animations */
.icon-ai-response {
    animation: pulse 2s ease-in-out infinite;
}

.icon-lip-movement {
    animation: bounce 3s ease-in-out infinite;
}

.icon-scoring {
    animation: glow 2.5s ease-in-out infinite;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.feature-highlight {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(5, 150, 105, 0.1);
    border: 1px solid rgba(5, 150, 105, 0.3);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #059669;
}

/* How It Works Section */
.steps-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

/* Responsive grid for steps */
@media (max-width: 1200px) {
    .steps-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem 3rem;
    }
}

@media (max-width: 768px) {
    .steps-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

.step-card {
    padding: 2rem;
    text-align: center;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

/* Add connecting lines between steps (desktop only) */
@media (min-width: 1201px) {
    .step-card:not(:last-child)::after {
        content: '→';
        position: absolute;
        right: -2rem;
        top: 50%;
        transform: translateY(-50%);
        font-size: 1.5rem;
        color: rgba(5, 150, 105, 0.3);
        z-index: 1;
    }
}

@media (min-width: 769px) and (max-width: 1200px) {
    .step-card:nth-child(odd):not(:nth-child(3))::after {
        content: '→';
        position: absolute;
        right: -3rem;
        top: 50%;
        transform: translateY(-50%);
        font-size: 1.5rem;
        color: rgba(5, 150, 105, 0.3);
        z-index: 1;
    }
    
    .step-card:nth-child(2)::after {
        content: '↓';
        position: absolute;
        bottom: -1.5rem;
        left: 50%;
        transform: translateX(-50%);
        font-size: 1.5rem;
        color: rgba(5, 150, 105, 0.3);
        z-index: 1;
    }
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #059669, #0891b2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 auto 1.5rem;
}

.step-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.step-content p {
    color: #64748b;
    line-height: 1.6;
}

/* About Section */
.about {
    background: rgba(255, 255, 255, 0.2);
}

.about-card {
    padding: 3rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-card p {
    font-size: 1.1rem;
    color: #64748b;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(45deg, #059669, #0891b2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #64748b;
    font-size: 0.9rem;
}

/* Contact Section */
.contact-card {
    padding: 3rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.download-section, .contact-info {
    text-align: center;
}

.download-section h3, .contact-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.download-section p, .contact-info p {
    color: #64748b;
    margin-bottom: 2rem;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 15px;
    color: #475569;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-download:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
    border-color: rgba(5, 150, 105, 0.5);
}

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

.download-text {
    font-size: 0.8rem;
    color: #64748b;
}

.download-store {
    font-size: 1rem;
    font-weight: 600;
}

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

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: center;
}

.contact-icon {
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(6, 182, 212, 0.2);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

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

.footer-section h3, .footer-section h4 {
    margin-bottom: 1rem;
    color: #1e293b;
}

.footer-section p {
    color: #64748b;
    line-height: 1.6;
}

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

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

.footer-section ul li a {
    color: #64748b;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #059669;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(6, 182, 212, 0.2);
}

.footer-bottom p {
    color: #94a3b8;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid rgba(255, 255, 255, 0.6);
        border-radius: 0 0 25px 25px;
        box-shadow: 
            0 10px 40px rgba(6, 182, 212, 0.2),
            0 4px 20px rgba(34, 197, 94, 0.1);
        flex-direction: column;
        padding: 2.5rem 2rem 2rem;
        gap: 1rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1002;
        max-height: 70vh;
        overflow-y: auto;
    }
    
    .nav-links.mobile-active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: all;
        animation: slideInDown 0.4s ease-out;
    }
    
    .nav-links a {
        padding: 1rem 1.5rem;
        border-radius: 15px;
        text-align: center;
        font-weight: 500;
        font-size: 1rem;
        background: rgba(255, 255, 255, 0.7);
        border: 1px solid rgba(6, 182, 212, 0.3);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        position: relative;
        overflow: hidden;
        margin: 0.25rem 0;
    }
    
    .nav-links a::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(5, 150, 105, 0.1), transparent);
        transition: left 0.5s ease;
    }
    
    .nav-links a:hover {
        background: rgba(5, 150, 105, 0.15);
        border-color: rgba(5, 150, 105, 0.5);
        transform: translateY(-3px) scale(1.02);
        box-shadow: 0 6px 20px rgba(5, 150, 105, 0.2);
        color: #047857;
    }
    
    .nav-links a:hover::before {
        left: 100%;
    }
    
    .nav-links a:active {
        transform: translateY(-1px) scale(1);
        transition: transform 0.1s ease;
    }
    
    .hamburger {
        display: flex;
        z-index: 1003;
        position: relative;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
        background: linear-gradient(45deg, #059669, #0891b2);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
        transform: scale(0);
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
        background: linear-gradient(45deg, #059669, #0891b2);
    }
    
    .mobile-menu-open {
        overflow: hidden;
    }
    
    /* Mobile menu animations */
    @keyframes slideInDown {
        from {
            transform: translateY(-100%);
            opacity: 0;
        }
        to {
            transform: translateY(0);
            opacity: 1;
        }
    }
    
    /* Add staggered animation to menu items */
    .nav-links.mobile-active a {
        animation: fadeInUp 0.4s ease-out backwards;
    }
    
    .nav-links.mobile-active a:nth-child(1) { animation-delay: 0.1s; }
    .nav-links.mobile-active a:nth-child(2) { animation-delay: 0.15s; }
    .nav-links.mobile-active a:nth-child(3) { animation-delay: 0.2s; }
    .nav-links.mobile-active a:nth-child(4) { animation-delay: 0.25s; }
    .nav-links.mobile-active a:nth-child(5) { animation-delay: 0.3s; }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-card {
        padding: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .contact-card {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .nav-content {
        padding: 0 1rem;
    }
    
    .hero-card {
        padding: 1.5rem;
    }
    
    .feature-card, .step-card, .about-card, .contact-card {
        padding: 1.5rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}

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

/* Focus styles for accessibility */
button:focus,
a:focus {
    outline: 2px solid #059669;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .glass-card {
        background: rgba(255, 255, 255, 0.8);
        border: 2px solid rgba(5, 150, 105, 0.8);
    }
    
    .btn-primary {
        background: #059669;
        color: #ffffff;
    }
    
    .btn-secondary {
        background: #ffffff;
        border: 2px solid #059669;
        color: #059669;
    }
}

/* Loading animation for better UX */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Feature icon animations */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-8px);
    }
    60% {
        transform: translateY(-4px);
    }
}

@keyframes glow {
    0%, 100% {
        filter: drop-shadow(0 2px 4px rgba(255, 255, 255, 0.2));
    }
    50% {
        filter: drop-shadow(0 2px 8px rgba(255, 255, 255, 0.4)) drop-shadow(0 0 12px rgba(5, 150, 105, 0.3));
    }
}

.glass-card {
    animation: fadeInUp 0.6s ease-out forwards;
}

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

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.3);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, #059669, #0891b2);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, #047857, #0e7490);
}