/* ===========================================
   tanso.group - Isometric Carbon City
   Colors: #F0F5FA, #1A3A40, #3080A0, #40A080, #80C0B0, #D0E8E0
   Fonts: DM Sans (display), Inter (body)
   =========================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    line-height: 1.75;
    font-weight: 400;
    color: #1A3A40;
    background-color: #F0F5FA;
    overflow-x: hidden;
}

/* --- Parallax Viewport --- */
.parallax-viewport {
    position: relative;
    width: 100%;
    min-height: 100vh;
}

/* --- Layers --- */
.layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    pointer-events: none;
}

.layer--background {
    z-index: 1;
    height: 100%;
}

.layer--midground {
    z-index: 2;
    height: 100%;
}

.layer--foreground {
    position: relative;
    z-index: 3;
    pointer-events: auto;
}

/* ===========================================
   ISOMETRIC BUILDINGS
   =========================================== */

.iso-building {
    position: absolute;
    transform-style: preserve-3d;
}

.iso-face {
    position: absolute;
}

/* Isometric block faces share a common transform approach */
.iso-face--top {
    transform: rotateX(60deg) rotateZ(45deg);
    transform-origin: center center;
}

.iso-face--left {
    transform: skewY(30deg);
    transform-origin: bottom left;
}

.iso-face--right {
    transform: skewY(-30deg);
    transform-origin: bottom right;
}

/* --- Hero Skyline Buildings --- */
.iso-building--1 {
    left: 8%;
    top: 280px;
    width: 70px;
    height: 140px;
}
.iso-building--1 .iso-face--top {
    width: 70px;
    height: 70px;
    background: #80C0B0;
    opacity: 0.5;
    top: -35px;
    left: 0;
}
.iso-building--1 .iso-face--left {
    width: 35px;
    height: 140px;
    background: #3080A0;
    opacity: 0.35;
    left: 0;
    top: 0;
}
.iso-building--1 .iso-face--right {
    width: 35px;
    height: 140px;
    background: #40A080;
    opacity: 0.3;
    right: 0;
    top: 0;
}

.iso-building--2 {
    left: 15%;
    top: 220px;
    width: 55px;
    height: 200px;
}
.iso-building--2 .iso-face--top {
    width: 55px;
    height: 55px;
    background: #40A080;
    opacity: 0.45;
    top: -28px;
}
.iso-building--2 .iso-face--left {
    width: 28px;
    height: 200px;
    background: #1A3A40;
    opacity: 0.2;
    left: 0;
}
.iso-building--2 .iso-face--right {
    width: 27px;
    height: 200px;
    background: #3080A0;
    opacity: 0.25;
    right: 0;
}

.iso-building--3 {
    left: 25%;
    top: 300px;
    width: 90px;
    height: 100px;
}
.iso-building--3 .iso-face--top {
    width: 90px;
    height: 90px;
    background: #D0E8E0;
    opacity: 0.6;
    top: -45px;
}
.iso-building--3 .iso-face--left {
    width: 45px;
    height: 100px;
    background: #3080A0;
    opacity: 0.3;
    left: 0;
}
.iso-building--3 .iso-face--right {
    width: 45px;
    height: 100px;
    background: #80C0B0;
    opacity: 0.25;
    right: 0;
}

.iso-building--4 {
    left: 38%;
    top: 250px;
    width: 60px;
    height: 170px;
}
.iso-building--4 .iso-face--top {
    width: 60px;
    height: 60px;
    background: #3080A0;
    opacity: 0.4;
    top: -30px;
}
.iso-building--4 .iso-face--left {
    width: 30px;
    height: 170px;
    background: #1A3A40;
    opacity: 0.2;
    left: 0;
}
.iso-building--4 .iso-face--right {
    width: 30px;
    height: 170px;
    background: #40A080;
    opacity: 0.25;
    right: 0;
}

.iso-building--5 {
    left: 50%;
    top: 310px;
    width: 80px;
    height: 110px;
}
.iso-building--5 .iso-face--top {
    width: 80px;
    height: 80px;
    background: #80C0B0;
    opacity: 0.5;
    top: -40px;
}
.iso-building--5 .iso-face--left {
    width: 40px;
    height: 110px;
    background: #3080A0;
    opacity: 0.3;
    left: 0;
}
.iso-building--5 .iso-face--right {
    width: 40px;
    height: 110px;
    background: #40A080;
    opacity: 0.25;
    right: 0;
}

.iso-building--6 {
    right: 22%;
    top: 240px;
    width: 65px;
    height: 180px;
}
.iso-building--6 .iso-face--top {
    width: 65px;
    height: 65px;
    background: #40A080;
    opacity: 0.4;
    top: -33px;
}
.iso-building--6 .iso-face--left {
    width: 33px;
    height: 180px;
    background: #1A3A40;
    opacity: 0.22;
    left: 0;
}
.iso-building--6 .iso-face--right {
    width: 32px;
    height: 180px;
    background: #3080A0;
    opacity: 0.28;
    right: 0;
}

.iso-building--7 {
    right: 12%;
    top: 290px;
    width: 75px;
    height: 130px;
}
.iso-building--7 .iso-face--top {
    width: 75px;
    height: 75px;
    background: #D0E8E0;
    opacity: 0.55;
    top: -38px;
}
.iso-building--7 .iso-face--left {
    width: 38px;
    height: 130px;
    background: #80C0B0;
    opacity: 0.3;
    left: 0;
}
.iso-building--7 .iso-face--right {
    width: 37px;
    height: 130px;
    background: #40A080;
    opacity: 0.25;
    right: 0;
}

.iso-building--8 {
    right: 5%;
    top: 260px;
    width: 50px;
    height: 160px;
}
.iso-building--8 .iso-face--top {
    width: 50px;
    height: 50px;
    background: #3080A0;
    opacity: 0.45;
    top: -25px;
}
.iso-building--8 .iso-face--left {
    width: 25px;
    height: 160px;
    background: #1A3A40;
    opacity: 0.2;
    left: 0;
}
.iso-building--8 .iso-face--right {
    width: 25px;
    height: 160px;
    background: #80C0B0;
    opacity: 0.3;
    right: 0;
}

.iso-building--9 {
    left: 5%;
    top: 340px;
    width: 45px;
    height: 80px;
}
.iso-building--9 .iso-face--top {
    width: 45px;
    height: 45px;
    background: #D0E8E0;
    opacity: 0.5;
    top: -23px;
}
.iso-building--9 .iso-face--left {
    width: 23px;
    height: 80px;
    background: #40A080;
    opacity: 0.3;
    left: 0;
}
.iso-building--9 .iso-face--right {
    width: 22px;
    height: 80px;
    background: #3080A0;
    opacity: 0.25;
    right: 0;
}

.iso-building--10 {
    left: 44%;
    top: 200px;
    width: 40px;
    height: 220px;
}
.iso-building--10 .iso-face--top {
    width: 40px;
    height: 40px;
    background: #80C0B0;
    opacity: 0.4;
    top: -20px;
}
.iso-building--10 .iso-face--left {
    width: 20px;
    height: 220px;
    background: #1A3A40;
    opacity: 0.18;
    left: 0;
}
.iso-building--10 .iso-face--right {
    width: 20px;
    height: 220px;
    background: #40A080;
    opacity: 0.22;
    right: 0;
}

.iso-building--11 {
    right: 32%;
    top: 280px;
    width: 55px;
    height: 140px;
}
.iso-building--11 .iso-face--top {
    width: 55px;
    height: 55px;
    background: #3080A0;
    opacity: 0.45;
    top: -28px;
}
.iso-building--11 .iso-face--left {
    width: 28px;
    height: 140px;
    background: #40A080;
    opacity: 0.28;
    left: 0;
}
.iso-building--11 .iso-face--right {
    width: 27px;
    height: 140px;
    background: #80C0B0;
    opacity: 0.25;
    right: 0;
}

.iso-building--12 {
    left: 32%;
    top: 350px;
    width: 48px;
    height: 70px;
}
.iso-building--12 .iso-face--top {
    width: 48px;
    height: 48px;
    background: #40A080;
    opacity: 0.5;
    top: -24px;
}
.iso-building--12 .iso-face--left {
    width: 24px;
    height: 70px;
    background: #3080A0;
    opacity: 0.3;
    left: 0;
}
.iso-building--12 .iso-face--right {
    width: 24px;
    height: 70px;
    background: #D0E8E0;
    opacity: 0.35;
    right: 0;
}

/* --- Section 2 Background Buildings --- */
.iso-building--s2-1 {
    left: 3%;
    top: 820px;
    width: 80px;
    height: 160px;
}
.iso-building--s2-1 .iso-face--top {
    width: 80px;
    height: 80px;
    background: #3080A0;
    opacity: 0.35;
    top: -40px;
}
.iso-building--s2-1 .iso-face--left {
    width: 40px;
    height: 160px;
    background: #1A3A40;
    opacity: 0.2;
    left: 0;
}
.iso-building--s2-1 .iso-face--right {
    width: 40px;
    height: 160px;
    background: #40A080;
    opacity: 0.25;
    right: 0;
}

.iso-building--s2-2 {
    right: 5%;
    top: 780px;
    width: 65px;
    height: 200px;
}
.iso-building--s2-2 .iso-face--top {
    width: 65px;
    height: 65px;
    background: #80C0B0;
    opacity: 0.4;
    top: -33px;
}
.iso-building--s2-2 .iso-face--left {
    width: 33px;
    height: 200px;
    background: #3080A0;
    opacity: 0.25;
    left: 0;
}
.iso-building--s2-2 .iso-face--right {
    width: 32px;
    height: 200px;
    background: #1A3A40;
    opacity: 0.2;
    right: 0;
}

.iso-building--s2-3 {
    left: 20%;
    top: 900px;
    width: 50px;
    height: 120px;
}
.iso-building--s2-3 .iso-face--top {
    width: 50px;
    height: 50px;
    background: #D0E8E0;
    opacity: 0.5;
    top: -25px;
}
.iso-building--s2-3 .iso-face--left {
    width: 25px;
    height: 120px;
    background: #40A080;
    opacity: 0.3;
    left: 0;
}
.iso-building--s2-3 .iso-face--right {
    width: 25px;
    height: 120px;
    background: #80C0B0;
    opacity: 0.25;
    right: 0;
}

.iso-building--s2-4 {
    right: 18%;
    top: 860px;
    width: 70px;
    height: 150px;
}
.iso-building--s2-4 .iso-face--top {
    width: 70px;
    height: 70px;
    background: #40A080;
    opacity: 0.4;
    top: -35px;
}
.iso-building--s2-4 .iso-face--left {
    width: 35px;
    height: 150px;
    background: #1A3A40;
    opacity: 0.18;
    left: 0;
}
.iso-building--s2-4 .iso-face--right {
    width: 35px;
    height: 150px;
    background: #3080A0;
    opacity: 0.28;
    right: 0;
}

/* --- Section 3 Wider Landscape Buildings --- */
.iso-building--s3-1 {
    left: 2%;
    top: 1600px;
    width: 100px;
    height: 120px;
}
.iso-building--s3-1 .iso-face--top {
    width: 100px;
    height: 100px;
    background: #80C0B0;
    opacity: 0.4;
    top: -50px;
}
.iso-building--s3-1 .iso-face--left {
    width: 50px;
    height: 120px;
    background: #3080A0;
    opacity: 0.25;
    left: 0;
}
.iso-building--s3-1 .iso-face--right {
    width: 50px;
    height: 120px;
    background: #40A080;
    opacity: 0.2;
    right: 0;
}

.iso-building--s3-2 {
    left: 18%;
    top: 1550px;
    width: 60px;
    height: 190px;
}
.iso-building--s3-2 .iso-face--top {
    width: 60px;
    height: 60px;
    background: #3080A0;
    opacity: 0.35;
    top: -30px;
}
.iso-building--s3-2 .iso-face--left {
    width: 30px;
    height: 190px;
    background: #1A3A40;
    opacity: 0.2;
    left: 0;
}
.iso-building--s3-2 .iso-face--right {
    width: 30px;
    height: 190px;
    background: #80C0B0;
    opacity: 0.28;
    right: 0;
}

.iso-building--s3-3 {
    left: 35%;
    top: 1650px;
    width: 55px;
    height: 100px;
}
.iso-building--s3-3 .iso-face--top {
    width: 55px;
    height: 55px;
    background: #D0E8E0;
    opacity: 0.5;
    top: -28px;
}
.iso-building--s3-3 .iso-face--left {
    width: 28px;
    height: 100px;
    background: #40A080;
    opacity: 0.3;
    left: 0;
}
.iso-building--s3-3 .iso-face--right {
    width: 27px;
    height: 100px;
    background: #3080A0;
    opacity: 0.25;
    right: 0;
}

.iso-building--s3-4 {
    right: 30%;
    top: 1580px;
    width: 70px;
    height: 160px;
}
.iso-building--s3-4 .iso-face--top {
    width: 70px;
    height: 70px;
    background: #40A080;
    opacity: 0.4;
    top: -35px;
}
.iso-building--s3-4 .iso-face--left {
    width: 35px;
    height: 160px;
    background: #1A3A40;
    opacity: 0.18;
    left: 0;
}
.iso-building--s3-4 .iso-face--right {
    width: 35px;
    height: 160px;
    background: #80C0B0;
    opacity: 0.25;
    right: 0;
}

.iso-building--s3-5 {
    right: 15%;
    top: 1620px;
    width: 85px;
    height: 130px;
}
.iso-building--s3-5 .iso-face--top {
    width: 85px;
    height: 85px;
    background: #3080A0;
    opacity: 0.35;
    top: -43px;
}
.iso-building--s3-5 .iso-face--left {
    width: 43px;
    height: 130px;
    background: #40A080;
    opacity: 0.28;
    left: 0;
}
.iso-building--s3-5 .iso-face--right {
    width: 42px;
    height: 130px;
    background: #1A3A40;
    opacity: 0.2;
    right: 0;
}

.iso-building--s3-6 {
    right: 3%;
    top: 1560px;
    width: 50px;
    height: 180px;
}
.iso-building--s3-6 .iso-face--top {
    width: 50px;
    height: 50px;
    background: #80C0B0;
    opacity: 0.45;
    top: -25px;
}
.iso-building--s3-6 .iso-face--left {
    width: 25px;
    height: 180px;
    background: #3080A0;
    opacity: 0.3;
    left: 0;
}
.iso-building--s3-6 .iso-face--right {
    width: 25px;
    height: 180px;
    background: #D0E8E0;
    opacity: 0.35;
    right: 0;
}

/* --- Section 4 Converging City Buildings --- */
.iso-building--s4-1 {
    left: 10%;
    top: 2800px;
    width: 65px;
    height: 150px;
}
.iso-building--s4-1 .iso-face--top {
    width: 65px;
    height: 65px;
    background: #40A080;
    opacity: 0.4;
    top: -33px;
}
.iso-building--s4-1 .iso-face--left {
    width: 33px;
    height: 150px;
    background: #3080A0;
    opacity: 0.28;
    left: 0;
}
.iso-building--s4-1 .iso-face--right {
    width: 32px;
    height: 150px;
    background: #80C0B0;
    opacity: 0.25;
    right: 0;
}

.iso-building--s4-2 {
    left: 25%;
    top: 2850px;
    width: 55px;
    height: 120px;
}
.iso-building--s4-2 .iso-face--top {
    width: 55px;
    height: 55px;
    background: #3080A0;
    opacity: 0.35;
    top: -28px;
}
.iso-building--s4-2 .iso-face--left {
    width: 28px;
    height: 120px;
    background: #1A3A40;
    opacity: 0.2;
    left: 0;
}
.iso-building--s4-2 .iso-face--right {
    width: 27px;
    height: 120px;
    background: #40A080;
    opacity: 0.25;
    right: 0;
}

.iso-building--s4-3 {
    left: 40%;
    top: 2780px;
    width: 70px;
    height: 180px;
}
.iso-building--s4-3 .iso-face--top {
    width: 70px;
    height: 70px;
    background: #D0E8E0;
    opacity: 0.5;
    top: -35px;
}
.iso-building--s4-3 .iso-face--left {
    width: 35px;
    height: 180px;
    background: #80C0B0;
    opacity: 0.3;
    left: 0;
}
.iso-building--s4-3 .iso-face--right {
    width: 35px;
    height: 180px;
    background: #3080A0;
    opacity: 0.25;
    right: 0;
}

.iso-building--s4-4 {
    right: 35%;
    top: 2830px;
    width: 60px;
    height: 140px;
}
.iso-building--s4-4 .iso-face--top {
    width: 60px;
    height: 60px;
    background: #80C0B0;
    opacity: 0.45;
    top: -30px;
}
.iso-building--s4-4 .iso-face--left {
    width: 30px;
    height: 140px;
    background: #40A080;
    opacity: 0.28;
    left: 0;
}
.iso-building--s4-4 .iso-face--right {
    width: 30px;
    height: 140px;
    background: #1A3A40;
    opacity: 0.18;
    right: 0;
}

.iso-building--s4-5 {
    right: 20%;
    top: 2870px;
    width: 50px;
    height: 110px;
}
.iso-building--s4-5 .iso-face--top {
    width: 50px;
    height: 50px;
    background: #3080A0;
    opacity: 0.4;
    top: -25px;
}
.iso-building--s4-5 .iso-face--left {
    width: 25px;
    height: 110px;
    background: #80C0B0;
    opacity: 0.3;
    left: 0;
}
.iso-building--s4-5 .iso-face--right {
    width: 25px;
    height: 110px;
    background: #D0E8E0;
    opacity: 0.35;
    right: 0;
}

.iso-building--s4-6 {
    right: 8%;
    top: 2810px;
    width: 75px;
    height: 160px;
}
.iso-building--s4-6 .iso-face--top {
    width: 75px;
    height: 75px;
    background: #40A080;
    opacity: 0.4;
    top: -38px;
}
.iso-building--s4-6 .iso-face--left {
    width: 38px;
    height: 160px;
    background: #3080A0;
    opacity: 0.25;
    left: 0;
}
.iso-building--s4-6 .iso-face--right {
    width: 37px;
    height: 160px;
    background: #80C0B0;
    opacity: 0.22;
    right: 0;
}

/* --- Isometric Connection Pathways --- */
.iso-path {
    position: absolute;
    height: 3px;
    opacity: 0.15;
    transform: skewY(-15deg);
}

.iso-path--1 {
    left: 15%;
    top: 420px;
    width: 30%;
    background: linear-gradient(90deg, #3080A0, #40A080);
}

.iso-path--2 {
    left: 40%;
    top: 380px;
    width: 25%;
    background: linear-gradient(90deg, #40A080, #80C0B0);
}

.iso-path--3 {
    left: 55%;
    top: 440px;
    width: 20%;
    background: linear-gradient(90deg, #80C0B0, #3080A0);
}

/* ===========================================
   BUBBLE TRANSIT INDICATORS
   =========================================== */

.bubble {
    position: absolute;
    border-radius: 50%;
    animation: bubbleDrift linear infinite;
}

@keyframes bubbleDrift {
    0% {
        transform: translateY(0) translateX(0);
        opacity: var(--bubble-opacity, 0.25);
    }
    25% {
        transform: translateY(-30px) translateX(10px);
    }
    50% {
        transform: translateY(-60px) translateX(-5px);
        opacity: calc(var(--bubble-opacity, 0.25) * 0.6);
    }
    75% {
        transform: translateY(-90px) translateX(8px);
    }
    100% {
        transform: translateY(-120px) translateX(0);
        opacity: 0;
    }
}

/* Hero bubbles */
.bubble--1 {
    width: 60px;
    height: 60px;
    background: #3080A0;
    --bubble-opacity: 0.2;
    left: 12%;
    top: 350px;
    animation-duration: 8s;
    animation-delay: 0s;
}

.bubble--2 {
    width: 40px;
    height: 40px;
    background: #40A080;
    --bubble-opacity: 0.25;
    left: 28%;
    top: 400px;
    animation-duration: 10s;
    animation-delay: -2s;
}

.bubble--3 {
    width: 70px;
    height: 70px;
    background: #80C0B0;
    --bubble-opacity: 0.18;
    left: 55%;
    top: 320px;
    animation-duration: 12s;
    animation-delay: -4s;
}

.bubble--4 {
    width: 45px;
    height: 45px;
    background: #3080A0;
    --bubble-opacity: 0.22;
    right: 20%;
    top: 380px;
    animation-duration: 9s;
    animation-delay: -1s;
}

.bubble--5 {
    width: 55px;
    height: 55px;
    background: #40A080;
    --bubble-opacity: 0.2;
    right: 35%;
    top: 300px;
    animation-duration: 11s;
    animation-delay: -6s;
}

/* Section 2 bubbles */
.bubble--6 {
    width: 50px;
    height: 50px;
    background: #80C0B0;
    --bubble-opacity: 0.22;
    left: 8%;
    top: 900px;
    animation-duration: 9s;
    animation-delay: -3s;
}

.bubble--7 {
    width: 65px;
    height: 65px;
    background: #3080A0;
    --bubble-opacity: 0.18;
    left: 35%;
    top: 950px;
    animation-duration: 11s;
    animation-delay: -5s;
}

.bubble--8 {
    width: 42px;
    height: 42px;
    background: #40A080;
    --bubble-opacity: 0.25;
    right: 10%;
    top: 880px;
    animation-duration: 8s;
    animation-delay: -7s;
}

.bubble--9 {
    width: 58px;
    height: 58px;
    background: #80C0B0;
    --bubble-opacity: 0.2;
    right: 30%;
    top: 1000px;
    animation-duration: 10s;
    animation-delay: -2s;
}

.bubble--10 {
    width: 38px;
    height: 38px;
    background: #3080A0;
    --bubble-opacity: 0.28;
    left: 60%;
    top: 850px;
    animation-duration: 7s;
    animation-delay: -4s;
}

/* Section 3 bubbles */
.bubble--11 {
    width: 72px;
    height: 72px;
    background: #40A080;
    --bubble-opacity: 0.18;
    left: 5%;
    top: 1700px;
    animation-duration: 13s;
    animation-delay: -1s;
}

.bubble--12 {
    width: 48px;
    height: 48px;
    background: #3080A0;
    --bubble-opacity: 0.22;
    left: 25%;
    top: 1800px;
    animation-duration: 9s;
    animation-delay: -6s;
}

.bubble--13 {
    width: 55px;
    height: 55px;
    background: #80C0B0;
    --bubble-opacity: 0.2;
    left: 50%;
    top: 1750px;
    animation-duration: 10s;
    animation-delay: -3s;
}

.bubble--14 {
    width: 62px;
    height: 62px;
    background: #40A080;
    --bubble-opacity: 0.22;
    right: 15%;
    top: 1850px;
    animation-duration: 11s;
    animation-delay: -8s;
}

.bubble--15 {
    width: 44px;
    height: 44px;
    background: #3080A0;
    --bubble-opacity: 0.25;
    right: 40%;
    top: 1680px;
    animation-duration: 8s;
    animation-delay: -5s;
}

/* Section 4 bubbles */
.bubble--16 {
    width: 52px;
    height: 52px;
    background: #80C0B0;
    --bubble-opacity: 0.2;
    left: 15%;
    top: 2900px;
    animation-duration: 10s;
    animation-delay: -2s;
}

.bubble--17 {
    width: 68px;
    height: 68px;
    background: #3080A0;
    --bubble-opacity: 0.18;
    left: 40%;
    top: 2850px;
    animation-duration: 12s;
    animation-delay: -7s;
}

.bubble--18 {
    width: 46px;
    height: 46px;
    background: #40A080;
    --bubble-opacity: 0.24;
    right: 25%;
    top: 2950px;
    animation-duration: 9s;
    animation-delay: -4s;
}

.bubble--19 {
    width: 56px;
    height: 56px;
    background: #80C0B0;
    --bubble-opacity: 0.2;
    right: 10%;
    top: 2880px;
    animation-duration: 11s;
    animation-delay: -1s;
}

.bubble--20 {
    width: 40px;
    height: 40px;
    background: #3080A0;
    --bubble-opacity: 0.28;
    left: 65%;
    top: 2920px;
    animation-duration: 8s;
    animation-delay: -6s;
}

/* --- Infrastructure Lines (Midground) --- */
.infra-line {
    position: absolute;
    height: 2px;
    opacity: 0.12;
}

.infra-line--1 {
    left: 10%;
    top: 500px;
    width: 40%;
    background: linear-gradient(90deg, transparent, #3080A0, transparent);
    transform: skewY(-8deg);
}

.infra-line--2 {
    right: 10%;
    top: 1100px;
    width: 35%;
    background: linear-gradient(90deg, transparent, #40A080, transparent);
    transform: skewY(5deg);
}

.infra-line--3 {
    left: 20%;
    top: 1900px;
    width: 45%;
    background: linear-gradient(90deg, transparent, #80C0B0, transparent);
    transform: skewY(-6deg);
}

.infra-line--4 {
    left: 5%;
    top: 2700px;
    width: 50%;
    background: linear-gradient(90deg, transparent, #3080A0, transparent);
    transform: skewY(4deg);
}

/* ===========================================
   SECTIONS & CONTENT
   =========================================== */

.section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 24px;
}

/* --- Hero Section --- */
.section--hero {
    min-height: 100vh;
    padding-top: 0;
    padding-bottom: 0;
}

.card--hero {
    backdrop-filter: blur(6px);
    background: rgba(255, 255, 255, 0.85);
    border-radius: 20px;
    padding: 60px 80px;
    text-align: center;
    box-shadow: 0 8px 40px rgba(26, 58, 64, 0.08);
    max-width: 700px;
    width: 100%;
}

.hero-title {
    font-family: 'DM Sans', sans-serif;
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    color: #1A3A40;
    line-height: 1.1;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-family: 'Inter', sans-serif;
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 400;
    color: #3080A0;
    line-height: 1.6;
}

/* --- Section 2: Features --- */
.section--features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 40px;
}

.card--feature {
    backdrop-filter: blur(6px);
    background: rgba(255, 255, 255, 0.85);
    border-radius: 16px;
    padding: 0;
    overflow: hidden;
    box-shadow: 0 6px 30px rgba(26, 58, 64, 0.06);
}

.card--hover-scale {
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    cursor: default;
}

.card--hover-scale:hover {
    transform: scale(1.05);
}

.feature-image-container {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.feature-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #D0E8E0 0%, #80C0B0 40%, #3080A0 100%);
}

.feature-image--teal-filter {
    filter: saturate(0.8) hue-rotate(10deg);
}

.feature-image--2 {
    background: linear-gradient(225deg, #80C0B0 0%, #40A080 50%, #1A3A40 100%);
}

.feature-image--3 {
    background: linear-gradient(45deg, #3080A0 0%, #D0E8E0 60%, #40A080 100%);
}

.feature-title {
    font-family: 'DM Sans', sans-serif;
    font-size: clamp(1.3rem, 2.5vw, 1.6rem);
    font-weight: 700;
    color: #1A3A40;
    padding: 24px 28px 8px;
}

.feature-text {
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    line-height: 1.75;
    color: #1A3A40;
    opacity: 0.8;
    padding: 0 28px 28px;
}

/* --- Section 3: Landscape --- */
.section--landscape {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 40px;
    align-items: stretch;
}

.card--landscape {
    backdrop-filter: blur(6px);
    background: rgba(255, 255, 255, 0.85);
    border-radius: 20px;
    padding: 60px;
    text-align: center;
    box-shadow: 0 6px 30px rgba(26, 58, 64, 0.06);
    margin-bottom: 48px;
    width: 100%;
}

.pull-quote {
    font-family: 'DM Sans', sans-serif;
    font-size: 1.3rem;
    font-weight: 500;
    color: #3080A0;
    line-height: 1.7;
    border: none;
    padding: 0;
    margin: 0;
    font-style: normal;
}

.landscape-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    width: 100%;
}

.card--landscape-item {
    backdrop-filter: blur(6px);
    background: rgba(255, 255, 255, 0.85);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(26, 58, 64, 0.05);
}

.landscape-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 20px;
}

.landscape-icon svg {
    width: 100%;
    height: 100%;
}

.landscape-item-title {
    font-family: 'DM Sans', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: #1A3A40;
    margin-bottom: 10px;
}

.landscape-item-text {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    line-height: 1.7;
    color: #1A3A40;
    opacity: 0.75;
}

/* --- Section 4: Closing --- */
.section--closing {
    min-height: 60vh;
    padding: 100px 24px;
}

.card--closing {
    backdrop-filter: blur(6px);
    background: rgba(255, 255, 255, 0.85);
    border-radius: 20px;
    padding: 60px 80px;
    text-align: center;
    box-shadow: 0 8px 40px rgba(26, 58, 64, 0.08);
    max-width: 600px;
    width: 100%;
}

.closing-title {
    font-family: 'DM Sans', sans-serif;
    font-size: clamp(2.2rem, 5vw, 4.5rem);
    font-weight: 700;
    color: #1A3A40;
    line-height: 1.1;
    margin-bottom: 12px;
}

.closing-text {
    font-family: 'Inter', sans-serif;
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: #40A080;
    font-weight: 400;
}

/* ===========================================
   RESPONSIVE
   =========================================== */

@media (max-width: 1024px) {
    .section--features {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .landscape-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .section--features {
        grid-template-columns: 1fr;
        padding: 60px 20px;
    }

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

    .card--hero {
        padding: 40px 30px;
    }

    .card--closing {
        padding: 40px 30px;
    }

    .card--landscape {
        padding: 40px 24px;
    }

    .section--landscape {
        padding: 60px 20px;
    }

    /* Hide some background buildings on mobile */
    .iso-building--3,
    .iso-building--5,
    .iso-building--8,
    .iso-building--10,
    .iso-building--11,
    .iso-building--12,
    .iso-building--s2-3,
    .iso-building--s2-4,
    .iso-building--s3-3,
    .iso-building--s3-4,
    .iso-building--s3-5,
    .iso-building--s4-3,
    .iso-building--s4-4,
    .iso-building--s4-5 {
        display: none;
    }

    /* Reduce bubble count on mobile */
    .bubble--3,
    .bubble--5,
    .bubble--7,
    .bubble--9,
    .bubble--12,
    .bubble--14,
    .bubble--17,
    .bubble--19 {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: clamp(2.2rem, 12vw, 3.5rem);
    }

    .closing-title {
        font-size: clamp(1.8rem, 10vw, 3rem);
    }

    .pull-quote {
        font-size: 1.1rem;
    }
}