:root {
    --bg-color: #050507;
    --surface-color: #0f1014;
    --surface-glass: rgba(20, 22, 28, 0.6);
    --primary-color: #00f2ff;
    --secondary-color: #0055ff;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --gradient-main: linear-gradient(135deg, #00f2ff 0%, #0055ff 100%);
    --glow: 0 0 20px rgba(0, 242, 255, 0.3);
    --font-main: 'Outfit', sans-serif;
    --nav-height: 80px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Utilities */
.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    padding: 12px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: var(--glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(0, 242, 255, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    padding: 12px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.glass {
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    z-index: 1000;
    background: rgba(5, 5, 7, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
}

.nav-links a:not(.btn-primary) {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:not(.btn-primary):hover {
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 120px 5% 50px;
    position: relative;
    overflow: hidden;
}

/* Background Glows */
.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 85, 255, 0.2) 0%, rgba(0,0,0,0) 70%);
    border-radius: 50%;
    z-index: -1;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 242, 255, 0.15) 0%, rgba(0,0,0,0) 70%);
    border-radius: 50%;
    z-index: -1;
}

.hero-content {
    max-width: 600px;
    z-index: 1;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 242, 255, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid rgba(0, 242, 255, 0.2);
}

.hero h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 24px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.stats {
    display: flex;
    gap: 50px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Hero Visual - CSS Purifier Model */
.hero-visual {
    position: relative;
    width: 500px;
    height: 600px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.purifier-glow {
    position: absolute;
    width: 300px;
    height: 500px;
    background: var(--gradient-main);
    filter: blur(80px);
    opacity: 0.4;
    border-radius: 100px;
    animation: pulse 4s infinite ease-in-out;
}

.purifier-model {
    position: relative;
    width: 280px;
    height: 520px;
    background: linear-gradient(135deg, #2a2d35 0%, #1a1c22 100%);
    border-radius: 60px;
    box-shadow: 
        -20px 20px 60px rgba(0,0,0,0.5),
        inset 2px 2px 2px rgba(255,255,255,0.1),
        inset -2px -2px 20px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    z-index: 2;
    transform: perspective(1000px) rotateY(-10deg);
    transition: transform 0.5s ease;
}

.purifier-model:hover {
    transform: perspective(1000px) rotateY(0deg);
}

.purifier-grill {
    width: 100%;
    height: 70%;
    background-image: radial-gradient(rgba(0,0,0,0.5) 2px, transparent 2px);
    background-size: 10px 10px;
    border-radius: 40px;
    margin-top: 20px;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.8);
}

.purifier-display {
    margin-top: 30px;
    width: 100px;
    height: 100px;
    background: #000;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 2px solid rgba(255,255,255,0.1);
    box-shadow: 0 0 15px rgba(0, 242, 255, 0.2);
}

.aqi-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.aqi-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--primary-color);
}

/* Features Section */
.features {
    padding: 100px 5%;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 16px;
}

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

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 40px 30px;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 242, 255, 0.3);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 24px;
    display: inline-block;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Technology Section */
.technology {
    padding: 100px 5%;
    background: linear-gradient(to bottom, var(--bg-color), #08090c);
}

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

.tech-image {
    position: relative;
    height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

.layer {
    width: 300px;
    height: 60px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin: -10px 0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-secondary);
    transform: rotateX(45deg) rotateZ(-10deg);
    transition: all 0.5s ease;
    backdrop-filter: blur(5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.tech-image:hover .layer {
    margin: 10px 0;
    transform: rotateX(45deg) rotateZ(0deg);
    background: rgba(0, 242, 255, 0.05);
    border-color: rgba(0, 242, 255, 0.3);
    color: var(--text-primary);
}

.tech-content h2 {
    font-size: 3rem;
    margin-bottom: 40px;
}

.tech-list {
    list-style: none;
}

.tech-list li {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.check-icon {
    width: 32px;
    height: 32px;
    background: rgba(0, 242, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.tech-list strong {
    display: block;
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.tech-list p {
    color: var(--text-secondary);
}

/* CTA Section */
.cta-section {
    padding: 100px 5%;
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 80px 40px;
    background: radial-gradient(circle at center, rgba(20, 22, 28, 0.8) 0%, rgba(10, 10, 12, 0.8) 100%);
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.cta-content p {
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.email-form {
    display: flex;
    gap: 10px;
    max-width: 500px;
    margin: 0 auto;
}

.email-form input {
    flex: 1;
    padding: 12px 24px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    font-family: var(--font-main);
    outline: none;
}

.email-form input:focus {
    border-color: var(--primary-color);
}

/* Footer */
footer {
    padding: 80px 5% 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 16px;
}

.footer-links {
    display: flex;
    gap: 80px;
    flex-wrap: wrap;
}

.link-group h4 {
    margin-bottom: 24px;
    font-size: 1.1rem;
}

.link-group a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Animations */
@keyframes pulse {
    0% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.05); }
    100% { opacity: 0.4; transform: scale(1); }
}

/* Responsive */
@media (max-width: 968px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 100px;
    }

    .hero-content {
        margin-bottom: 60px;
    }

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

    .stats {
        justify-content: center;
    }

    .tech-container {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 3rem;
    }
    
    .email-form {
        flex-direction: column;
    }
    
    .footer-links {
        gap: 40px;
    }
}