body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;background-color: #f5f5f5;
}

h2 {font-size: 2rem;margin-bottom: 20px;}

.landing-hero {
    position: relative;height: 100vh;
    background: url('../img/sustainChain.png') center/cover no-repeat;
    color: white;display: flex;align-items: center;
    justify-content: center;text-align: center;
}

.landing-overlay {
    position: absolute;
    /*top: 0;left: 0;width: 100%;height: 100%;*/
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
}

.landing-inner {position: relative;z-index: 1;}

.landing-inner h1{
    color: white;
}

.landing-inner p {margin: 0;}

.landing-inner h1 {
    font-size: clamp(1.8rem, 5vw, 3rem);
    margin-bottom: 10px;
    text-align: center;
}

.landing-inner p {font-size: clamp(1rem, 2.5vw, 1.25rem);margin-bottom: 20px;}

section {
    padding: 60px 20px;text-align: center;
    background: white;margin: 0;}

.btn-primary {
    display: inline-block;background-color: #2e7d32;color: white;
    padding: 14px 28px;font-size: 1.2rem;border-radius: 8px;
    text-decoration: none;transition: background 0.3s;
}

.btn-primary:hover {background-color: #1b5e20;}

.section-block { max-width:1100px; margin:0 auto; padding: 0 20px; }

.alt-bg {
    max-width: 100%;
    background: #fafafa;
    padding: 0;
}
.alt-bg .flex-row {
    max-width: 1100px;
    margin: 0 auto;
}

.flex-row {
    display:flex; align-items:center; gap:32px;
    padding:60px 40px;
    flex-direction: row !important;
}

.flex-row .img-box,
.flex-row .text-box { flex:1 1 50%; }

.flex-row .img-box img{
    width:100%; height:360px; object-fit:cover; border-radius:12px;
    box-shadow:0 8px 24px rgba(0,0,0,.08);
}

.flex-row .text-box h2{ font-size:30px; margin:0 0 6px; }
.flex-row .text-box h1{ font-size:36px; margin:0 0 16px; }
.flex-row .text-box p{ line-height:1.75; margin:0 0 16px; color:#333; }

html {
    scroll-behavior: smooth;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-secondary {
    display: inline-block;
    background-color: transparent;
    color: white;
    padding: 13px 28px;
    font-size: 1rem;
    border-radius: 8px;
    border: 2px solid white;
    text-decoration: none;
    transition: background 0.3s, color 0.3s;
    white-space: nowrap;
}
.btn-secondary:hover {
    background-color: white;
    color: #333;
}

.about-section {
    background: #f0f7f0;
    padding: 72px 20px;
    text-align: center;
}

.about-inner {
    max-width: 1000px;
    margin: 0 auto;
}

.about-inner h2 {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    color: #1b5e20;
    margin-bottom: 12px;
}

.about-lead {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: #444;
    max-width: 680px;
    margin: 0 auto 48px;
    line-height: 1.7;
}

.pillars {
    display: flex;
    gap: 28px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.pillar {
    background: white;
    border-radius: 14px;
    padding: 32px 24px;
    flex: 1 1 220px;
    max-width: 280px;
    box-shadow: 0 4px 18px rgba(0,0,0,.07);
    text-align: center;
}

.pillar h3 {
    font-size: 1.1rem;
    color: #1b5e20;
    margin: 0 0 10px;
}

.pillar p {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.65;
    margin: 0;
}

@media (max-width: 768px){
    .flex-row{ flex-direction:column !important; padding:40px 20px; }
    .flex-row .img-box img{ height:240px; }
    .flex-row .text-box{ text-align:center; }

    .landing-hero { height: 100svh; }
    .hero-buttons { gap: 12px; }
    .btn-primary,
    .btn-secondary { padding: 12px 22px; font-size: 0.95rem; }
    .pillars { gap: 16px; }
    .pillar { flex: 1 1 100%; max-width: 100%; padding: 24px 20px; }
}