@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

 :root {
     --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
     --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
     --accent-gradient: linear-gradient(135deg, #d86a48 0%, #ec3030 100%);
     --dark-bg: #0a0a0f;
     --light-bg: #1a1a2e;
     --card-bg: rgba(26, 26, 46, 0.7);
     --text-primary: #2c2c2c;
     --text-secondary: #6c6c6e;
     --glass-bg: rgba(255, 255, 255, 0.363);
     --glass-border: rgba(136, 134, 134, 0.267);
 }

 * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
 }
 
 body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    overflow-x: hidden;
    position: relative;
    will-change: scroll-position;
 }

 /* -----------------------Loading Animation - Optimized------------------------ */
 .loader {
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background: var(--dark-bg);
     display: flex;
     align-items: center;
     justify-content: center;
     z-index: 9999;
     transition: opacity 0.5s ease;
     will-change: opacity;
 }

 .loader.hidden {
     opacity: 0;
     pointer-events: none;
 }

 .loader-circle {
     width: 60px;
     height: 60px;
     border: 3px solid var(--glass-border);
     border-top-color: #4facfe;
     border-radius: 50%;
     animation: spin 1s linear infinite;
     will-change: transform;
 }

 @keyframes spin {
     to {
         transform: rotate(360deg);
     }
 }

 /* -----------------------Loading Screen ends---------------------- */

 /*------------------------ Animated Background - Optimized---------------- */
 .animated-bg {
     position: fixed;
     width: 100%;
     height: 100%;
     top: 0;
     left: 0;
     z-index: -1;
     background: white;
     overflow: hidden;
     contain: strict;
 }

 /* ------------------------Animated Background ends------------------ */

 /* -------------------------------Hero Section starts here----------------------- */

 /* Hero Section - Optimized */
 .hero-section {
     min-height: 100vh;
     display: flex;
     align-items: center;
     position: relative;
     overflow: hidden;
     contain: layout style paint;
 }

 .hero-content h1 {
     font-size: 4rem;
     font-weight: 900;
     margin-bottom: 1.5rem;
     background: linear-gradient(135deg, #df9b7b 0%, #945734 50%, #da5353 75%, #be5e6e 100%);
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
     animation: gradient-shift 3s ease infinite;
     background-size: 200% 200%;
     will-change: background-position;
 }

 @keyframes gradient-shift {
     0% {
         background-position: 0% 50%;
     }

     50% {
         background-position: 100% 50%;
     }

     100% {
         background-position: 0% 50%;
     }
 }

 /* Optimized Air Quality Visualization */
 .air-quality-viz {
     position: relative;
     width: 100%;
     height: 500px;
     display: flex;
     align-items: center;
     justify-content: center;
     perspective: 1000px;
     contain: layout style paint;
 }

 .viz-container {
     position: relative;
     width: 400px;
     height: 400px;
     transform-style: preserve-3d;
     animation: rotate3d 20s linear infinite;
     will-change: transform;
     contain: layout style paint;
 }

 @keyframes rotate3d {
     0% {
         transform: rotateX(0) rotateY(0);
     }

     100% {
         transform: rotateX(360deg) rotateY(360deg);
     }
 }

 /* Performance optimizations */
 .gpu-accelerated {
     transform: translateZ(0);
     backface-visibility: hidden;
     perspective: 1000px;
 }

 .viz-layer {
     position: absolute;
     width: 100%;
     height: 100%;
     border-radius: 50%;
     border: 2px solid rgba(79, 172, 254, 0.63);
     display: flex;
     align-items: center;
     justify-content: center;
     contain: layout style;
 }

 .viz-layer:nth-child(1) {
     transform: translateZ(0);
     background: radial-gradient(circle, rgba(233, 180, 130, 0.171), transparent);
 }

 .viz-layer:nth-child(2) {
     transform: translateZ(30px);
     border-color: rgba(174, 114, 180, 0.575);
     background: radial-gradient(circle, rgba(240, 147, 251, 0.05), transparent);
 }

 .viz-layer:nth-child(3) {
     transform: translateZ(60px);
     border-color: rgba(234, 102, 131, 0.3);
     background: radial-gradient(circle, rgba(102, 126, 234, 0.05), transparent);
 }

 .data-point {
     position: absolute;
     width: 12px;
     height: 12px;
     border-radius: 50%;
     background: var(--accent-gradient);
     box-shadow: 0 0 15px rgba(92, 68, 57, 0.938);
     animation: pulse 2s ease-in-out infinite;
     will-change: transform, opacity;
 }

 @keyframes pulse {

     0%,
     100% {
         transform: scale(1);
         opacity: 0.8;
     }

     50% {
         transform: scale(1.5);
         opacity: 0.4;
     }
 }


 /* -------------------------------Hero Section ends here----------------------- */


 /* -------------------------------AI Solutions Section starts here----------------------- */

 /* Section Titles */
 .section-title {
     font-size: 3rem;
     font-weight: 800;
     text-align: center;
     margin-bottom: 3rem;
     position: relative;
     background: linear-gradient(135deg, #eaa166 0%, #cf5555 100%);
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
 }

 .section-title::after {
     content: '';
     position: absolute;
     bottom: -10px;
     left: 50%;
     transform: translateX(-50%);
     width: 100px;
     height: 4px;
     background: var(--accent-gradient);
     border-radius: 2px;
 }

 /* Glass Cards - Optimized */
 .glass-card {
     background: var(--glass-bg);
     backdrop-filter: blur(10px);
     border: 1px solid var(--glass-border);
     border-radius: 20px;
     padding: 2rem;
     transition: all 0.3s ease;
     position: relative;
     overflow: hidden;
     contain: layout style paint;
     will-change: transform, box-shadow;
 }

 .glass-card::before {
     content: '';
     position: absolute;
     top: 0;
     left: -100%;
     width: 100%;
     height: 100%;
     background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
     transition: left 0.5s ease;
     will-change: left;
 }

 .glass-card:hover::before {
     left: 100%;
 }

 .glass-card:hover {
     transform: translateY(-10px);
     box-shadow: 0 20px 40px rgba(143, 116, 105, 0.445);
     border-color: rgba(234, 166, 102, 0.5);
 }

 /* Optimized Pollutant Visualization */
 .pollutant-viz {
     position: relative;
     width: 100%;
     height: 400px;
     overflow: hidden;
     border-radius: 20px;
     background-color: white;
     backdrop-filter: blur(10px);
     contain: layout style paint;
 }

 .pollutant-bubble {
     position: absolute;
     border-radius: 50%;
     display: flex;
     align-items: center;
     justify-content: center;
     color: white;
     font-weight: 600;
     animation: float-bubble 8s ease-in-out infinite;
     cursor: pointer;
     transition: transform 0.3s ease;
     will-change: transform;
     contain: layout style paint;
 }

 @keyframes float-bubble {

     0%,
     100% {
         transform: translateY(0) translateX(0);
     }

     25% {
         transform: translateY(-20px) translateX(10px);
     }

     50% {
         transform: translateY(10px) translateX(-10px);
     }

     75% {
         transform: translateY(-10px) translateX(20px);
     }
 }

 .pollutant-bubble:hover {
     transform: scale(1.1);
     z-index: 10;
 }

 .pm25 {
     width: 80px;
     height: 80px;
     background: linear-gradient(135deg, #ff9a9e, #fad0c4);
     top: 20%;
     left: 15%;
     animation-delay: 0s;
 }

 .pm10 {
     width: 100px;
     height: 100px;
     background: linear-gradient(135deg, #a1c4fd, #c2e9fb);
     top: 50%;
     left: 70%;
     animation-delay: 1s;
 }

 .o3 {
     width: 60px;
     height: 60px;
     background: linear-gradient(135deg, #ffecd2, #fcb69f);
     top: 70%;
     left: 30%;
     animation-delay: 2s;
 }

 .no2 {
     width: 70px;
     height: 70px;
     background: linear-gradient(135deg, #a8edea, #fed6e3);
     top: 30%;
     left: 50%;
     animation-delay: 3s;
 }

 .co {
     width: 90px;
     height: 90px;
     background: linear-gradient(135deg, #d299c2, #f5eec3);
     top: 60%;
     left: 10%;
     animation-delay: 4s;
 }

 .so2 {
     width: 75px;
     height: 75px;
     background: linear-gradient(135deg, #89f7fe, #66a6ff);
     top: 15%;
     left: 80%;
     animation-delay: 5s;
 }

 /* -------------------------------AI Solutions Section ends here----------------------- */


 /* -------------------------------Technology Stack Section starts here----------------------- */

 /* Feature Cards - Optimized */
 .feature-card {
     background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
     border: 1px solid rgba(234, 177, 102, 0.2);
     border-radius: 20px;
     padding: 2rem;
     height: 100%;
     transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
     position: relative;
     overflow: hidden;
     contain: layout style paint;
     will-change: transform, box-shadow;
 }

 .feature-card::after {
     content: '';
     position: absolute;
     top: -50%;
     left: -50%;
     width: 200%;
     height: 200%;
     background: radial-gradient(circle, rgba(254, 149, 79, 0.1) 0%, transparent 70%);
     opacity: 0;
     transition: opacity 0.3s ease;
     will-change: opacity;
 }

 .feature-card:hover::after {
     opacity: 1;
 }

 .feature-card:hover {
     transform: translateY(-15px) scale(1.02);
     box-shadow: 0 25px 50px rgba(179, 125, 74, 0.4);
 }

 .feature-icon {
     width: 70px;
     height: 70px;
     border-radius: 20px;
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 2rem;
     margin-bottom: 1.5rem;
     position: relative;
     animation: float-icon 3s ease-in-out infinite;
     will-change: transform;
 }

 @keyframes float-icon {

     0%,
     100% {
         transform: translateY(0);
     }

     50% {
         transform: translateY(-10px);
     }
 }

 .feature-icon.gradient-1 {
     background: var(--primary-gradient);
 }

 .feature-icon.gradient-2 {
     background: var(--secondary-gradient);
 }

 .feature-icon.gradient-3 {
     background: var(--accent-gradient);
 }

 /* Tech Stack - Optimized */
 .tech-badge {
     display: inline-block;
     padding: 8px 20px;
     background: rgba(236, 116, 116, 0.336);
     border: 1px solid rgba(236, 145, 145, 0.3);
     border-radius: 50px;
     margin: 5px;
     font-weight: 500;
     transition: all 0.3s ease;
     cursor: pointer;
     will-change: transform, box-shadow;
 }

 .tech-badge:hover {
     background: rgba(238, 132, 100, 0.432);
     transform: translateY(-3px);
     box-shadow: 0 10px 20px rgba(250, 101, 56, 0.603);
 }

 /* -------------------------------Technology Stack Section ends here----------------------- */

 /* -------------------------------Stats Counter Section starts here----------------------- */

 /* Stats Counter */
 .stat-card {
     text-align: center;
     padding: 2rem;
 }

 .counter {
     font-size: 3rem;
     font-weight: 800;
     background: var(--accent-gradient);
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
 }

 /* -------------------------------Stats Counter Section ends here----------------------- */


 /* -------------------------------Data Visualization Section starts here----------------------- */

 /* Optimized Data Flow Visualization */
 .data-flow-viz {
     position: relative;
     width: 100%;
     height: 400px;
     overflow: hidden;
     border-radius: 20px;
     background: rgba(255, 255, 255, 0.6);
     backdrop-filter: blur(10px);
     contain: layout style paint;
 }

 .data-node {
     margin-bottom: -10px;
     position: absolute;
     width: 120px;
     height: 120px;
     border-radius: 15px;
     display: flex;
     align-items: center;
     justify-content: center;
     flex-direction: column;
     color: white;
     font-weight: 600;
     transition: all 0.3s ease;
     will-change: transform;
     contain: layout style paint;
 }

 .data-node:hover {
     transform: scale(1.05);
     z-index: 10;
 }

 .data-node i {
     font-size: 2rem;
     margin-bottom: 0.5rem;
 }

 .node-weather {
     top: 20%;
     left: 10%;
     background: linear-gradient(135deg, #667eea, #764ba2);
 }

 .node-historical {
     top: 20%;
     right: 10%;
     background: linear-gradient(135deg, #f093fb, #f5576c);
 }

 .node-sensors {
     bottom: 20%;
     left: 10%;
     background: linear-gradient(135deg, #4facfe, #00f2fe);
 }

 .node-ai {
     bottom: 20%;
     right: 10%;
     background: linear-gradient(135deg, #43e97b, #38f9d7);
 }

 .node-central {
     top: 50%;
     left: 50%;
     transform: translate(-50%, -50%);
     width: 140px;
     height: 140px;
     background: linear-gradient(135deg, #fa709a, #fee140);
     animation: pulse-central 3s ease-in-out infinite;
     will-change: transform;
 }

 @keyframes pulse-central {

     0%,
     100% {
         transform: translate(-50%, -50%) scale(1);
     }

     50% {
         transform: translate(-50%, -50%) scale(1.1);
     }
 }

 .data-connection {
     position: absolute;
     height: 2px;
     background: linear-gradient(90deg, transparent, rgba(79, 172, 254, 0.8), transparent);
     transform-origin: left center;
     animation: data-flow 3s linear infinite;
     will-change: background-position;
 }

 @keyframes data-flow {
     0% {
         background-position: -100% 0;
     }

     100% {
         background-position: 100% 0;
     }
 }

 /* Optimized AI Brain Visualization */
 .ai-brain-viz {
     position: relative;
     width: 100%;
     height: 400px;
     display: flex;
     align-items: center;
     justify-content: center;
     overflow: hidden;
     border-radius: 20px;
     background: radial-gradient(circle at center, rgba(102, 126, 234, 0.1), transparent);
     contain: layout style paint;
 }

 .neural-connection {
     position: absolute;
     border: 2px solid rgba(79, 172, 254, 0.3);
     border-radius: 50%;
     will-change: transform;
 }

 .brain-core {
     position: relative;
     width: 200px;
     height: 200px;
     border-radius: 50%;
     background: linear-gradient(135deg, #667eea, #764ba2);
     display: flex;
     align-items: center;
     justify-content: center;
     box-shadow: 0 0 50px rgba(102, 126, 234, 0.5);
     animation: brain-pulse 4s ease-in-out infinite;
     will-change: transform, box-shadow;
 }

 @keyframes brain-pulse {

     0%,
     100% {
         transform: scale(1);
         box-shadow: 0 0 50px rgba(102, 126, 234, 0.5);
     }

     50% {
         transform: scale(1.05);
         box-shadow: 0 0 80px rgba(102, 126, 234, 0.8);
     }
 }

 .neural-node {
     position: absolute;
     width: 20px;
     height: 20px;
     border-radius: 50%;
     background: var(--accent-gradient);
     box-shadow: 0 0 10px rgba(79, 172, 254, 0.8);
     will-change: transform;
 }

 /* -------------------------------Data Visualization Section ends here----------------------- */

 .air-particle {
     position: absolute;
     width: 6px;
     height: 6px;
     border-radius: 50%;
     filter: blur(1px);
     opacity: 0.7;
     will-change: transform, opacity;
 }

 /* -------------------------------------btn gradient----------------- */

 .contact-btn {
    background: var(--accent-gradient);
    /* background: linear-gradient(135deg, #ff6a4d, #ff4b2b); */
    color: white;
    font-family: system-ui, sans-serif;
    border: none;
    padding: 20px 0px;
    border-radius: 50px;
    font-weight: 600;
    position: relative;
    overflow: hidden;
    gap: 1.5rem;
    width: 175px;
    height: 55px;
    line-height: 55px; 
    text-align: center;
 }

 /* Background layer */
 .contact-btn::before, .today-btn::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: -100%;
    width: 100%;
    height: 100%;
    border: 1px solid #1a1a2e;
    border-radius: 50px;
    background-color: #fff;
    transition: bottom 0.2s ease 0.3s;
    z-index: 0;
 }

 /* Text */

 .contact-btn span, 
 .today-btn span,
 .learn-btn span {
    display: block;
    position: absolute;
    transition: transform 0.3s ease;
    width: 100%;
    left: 0;
    z-index: 1;
 }

 .contact-btn .original-text, 
 .today-btn .original-text,
 .learn-btn .original-text {
    top: 0;
 }

 .contact-btn .hover-text, .today-btn .hover-text {
    color: rgb(51, 51, 51);
    position: absolute;
    top: 100%;
    left: 0;
 }

 .contact-btn:hover .original-text, 
 .today-btn:hover .original-text,
 .learn-btn:hover .original-text {
    transform: translateY(-100%);
 }

 .contact-btn:hover .hover-text,
 .today-btn:hover .hover-text,
 .learn-btn:hover .hover-text {
    transform: translateY(-100%);
 }

 /* Background moves after 1 second */
 .contact-btn:hover::before, 
 .today-btn:hover::before, 
 .learn-btn:hover::before {
    bottom: 0;
 }


 .learn-btn{
    font-family: system-ui, sans-serif;
    border: 1px solid #242323;
    position: relative;
    overflow: hidden;
    font-size: 1.3rem;
    font-weight: 400;
    width: 140px;
    height: 48px;
    line-height: 48px; 
    text-align: center;
 }

 .learn-btn::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: -100%;
    width: 100%;
    height: 100%;
    background: var(--text-primary);
    transition: bottom 0.2s ease 0.3s;
    z-index: 0;
 }

 .learn-btn .hover-text {
    color: #fff;
    position: absolute;
    top: 100%;
    left: 0;
 }

 .today-btn{
    background: var(--accent-gradient);
    /* background: linear-gradient(135deg, #ff6a4d, #ff4b2b); */
    color: white;
    font-family: system-ui, sans-serif;
    border: none;
    padding: 20px 20px;
    border-radius: 50px;
    font-weight: 600;
    position: relative;
    overflow: hidden;
    gap: 1.5rem;
    width: 260px;
    height: 63px;
    line-height: 63px; 
    text-align: center;
 }


 /* Responsive */
 @media (max-width: 768px) {
     .hero-content h1 {
         font-size: 2.5rem;
     }

     .viz-container {
         width: 300px;
         height: 300px;
     }

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

 /* Performance optimization for animations */
 .reduce-motion * {
     animation-duration: 0.01ms !important;
     animation-iteration-count: 1 !important;
     transition-duration: 0.01ms !important;
 }