/* ===================================
   Airtechno HVAC Systems - Main Styles
   Funky Modern Design with HVAC Theme
   =================================== */

/* === CSS Variables === */
:root {
    /* Brand Colors from Logo */
    --primary-teal: #008080;
    --primary-navy: #000080;
    --teal-light: #20B2AA;
    --teal-dark: #006666;
    --navy-light: #1e3a8a;
    
    /* Funky Accent Colors */
    --accent-cyan: #00D9FF;
    --accent-purple: #9D4EDD;
    --accent-pink: #FF006E;
    --accent-yellow: #FFD60A;
    --accent-orange: #FF6B35;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-teal) 0%, var(--primary-navy) 100%);
    --gradient-funky: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    --gradient-warm: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-pink) 100%);
    
    /* Neutrals */
    --white: #FFFFFF;
    --off-white: #F8F9FA;
    --light-gray: #E5E7EB;
    --gray: #6B7280;
    --dark-gray: #374151;
    --black: #111827;
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-display: 'Orbitron', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-funky: 0 8px 32px rgba(0, 217, 255, 0.3);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

ul {
    list-style: none;
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: var(--white);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-md);
}

.logo img {
    height: 60px;
    width: auto;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
    transition: var(--transition-normal);
}

.logo img:hover {
    filter: drop-shadow(0 0 20px rgba(0, 217, 255, 0.6));
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu li a {
    color: var(--primary-navy);
    font-weight: 500;
    font-size: 1rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.nav-menu li a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-funky);
    transition: var(--transition-normal);
}

.nav-menu li a:hover::before,
.nav-menu li a.active::before {
    width: 100%;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    width: 30px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: var(--transition-normal);
}

/* === Hero Section === */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.video-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(0, 0, 128, 0.8) 0%, 
        rgba(0, 128, 128, 0.6) 50%,
        rgba(0, 0, 128, 0.8) 100%);
    backdrop-filter: blur(2px);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: var(--white);
    padding: var(--spacing-md);
    animation: fadeInUp 1s ease;
}

.hero-logo-container {
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

.hero-logo {
    max-width: 250px;
    margin: 0 auto;
    filter: drop-shadow(0 0 30px rgba(255, 255, 255, 0.5));
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--white) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px rgba(0, 217, 255, 0.5);
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.5rem);
    margin-bottom: var(--spacing-lg);
    color: var(--off-white);
    font-weight: 300;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn span,
.btn i {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: var(--gradient-funky);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 217, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 217, 255, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-navy);
    transform: translateY(-3px);
}

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

.btn-light:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-light {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline-light:hover {
    background: var(--white);
    color: var(--primary-navy);
    transform: translateY(-3px);
}

/* === Scroll Indicator === */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    animation: bounce 2s infinite;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--white);
    border-radius: 15px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--white);
    border-radius: 2px;
    animation: scroll 1.5s infinite;
}

/* === Section Titles === */
.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

/* === Client Logos Section === */
.clients-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--off-white) 0%, var(--white) 100%);
    overflow: hidden;
}

.clients-carousel-wrapper {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.clients-carousel {
    display: flex;
    gap: 3rem;
    animation: scrollLeft 40s linear infinite;
    width: fit-content;
}

.clients-carousel.reverse {
    animation: scrollRight 40s linear infinite;
}

.client-logo {
    flex-shrink: 0;
    width: 300px;
    height: 125px;
    background: var(--white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 2px solid transparent;
    overflow: hidden;
}

.client-logo:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-teal);
}

.client-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition-normal);
}

.client-logo:hover img {
    transform: scale(1.05);
}

/* === Services Overview === */
.services-overview {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: var(--spacing-lg);
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 2px solid var(--light-gray);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-funky);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-teal);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-funky);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: var(--white);
    transition: var(--transition-normal);
}

.service-card:hover .service-icon {
    transform: rotate(360deg) scale(1.1);
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--gray);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.service-link {
    color: var(--primary-teal);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-normal);
}

.service-link:hover {
    color: var(--accent-cyan);
    gap: 1rem;
}

/* === Why Choose Us === */
.why-choose-us {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-teal) 100%);
    position: relative;
    overflow: hidden;
}

.why-choose-us::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.why-choose-us .section-title {
    color: var(--white);
    background: none;
    -webkit-text-fill-color: var(--white);
}

.why-choose-us .section-subtitle {
    color: var(--off-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: var(--spacing-lg);
}

.feature-box {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.2) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-slow);
}

.feature-box:hover::before {
    opacity: 1;
}

.feature-box:hover {
    transform: translateY(-10px);
    border-color: var(--accent-cyan);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.3);
}

.feature-number {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.1);
    font-family: var(--font-display);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-funky);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--white);
    transition: var(--transition-normal);
}

.feature-box:hover .feature-icon {
    transform: scale(1.2) rotate(360deg);
}

.feature-box h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.feature-box p {
    color: var(--off-white);
    line-height: 1.7;
}

/* === Stats Section === */
.stats-section {
    padding: var(--spacing-xl) 0;
    background: var(--off-white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
}

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

.stat-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-funky);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.8rem;
    color: var(--white);
    animation: pulse 2s ease-in-out infinite;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-navy);
    font-family: var(--font-display);
    margin-bottom: 0.5rem;
}

.stat-number::after {
    content: '+';
    color: var(--primary-teal);
}

.stat-label {
    font-size: 1.1rem;
    color: var(--gray);
    font-weight: 500;
}

/* === CTA Section === */
.cta-section {
    padding: var(--spacing-xl) 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta-section::before,
.cta-section::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-section::before {
    top: -200px;
    left: -200px;
}

.cta-section::after {
    bottom: -200px;
    right: -200px;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.3rem;
    color: var(--off-white);
    margin-bottom: var(--spacing-md);
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* === Footer === */
.footer {
    background: var(--white);
    color: var(--black);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    max-width: 180px;
    margin-bottom: 1rem;
}

.footer-col p {
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.footer-col h4 {
    color: var(--black);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--gradient-funky);
}

.footer-col ul li {
    margin-bottom: 0.8rem;
}

.footer-col ul li a {
    color: var(--black);
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-col ul li a:hover {
    color: var(--accent-cyan);
    padding-left: 5px;
}

.footer-col ul.contact-info li {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.footer-col ul.contact-info li i {
    color: var(--primary-teal);
    margin-top: 3px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--gradient-funky);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--black);
    font-size: 1.2rem;
    transition: var(--transition-normal);
}

.social-links a:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 217, 255, 0.4);
}

.footer-bottom {
    border-top: 1px solid var(--dark-gray);
    padding-top: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.footer-links a {
    color: var(--light-gray);
    transition: var(--transition-normal);
}

.footer-links a:hover {
    color: var(--accent-cyan);
}

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

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(6px);
    }
    100% {
        transform: translateY(0);
    }
}

@keyframes scrollLeft {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@keyframes scrollRight {
    0% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* === Responsive Design === */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        flex-direction: column;
        background: var(--primary-navy);
        width: 100%;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .services-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .client-logo {
        width: 250px;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}