/* Terra Cell Tech Brand Palette */
:root {
    --primary-teal: #34ABA2; /* Main Actions, Highlights, Icons */
    --deep-green: #334B49;   /* Backgrounds, Headers, Nav, Stability */
    --sage: #96B1AD;         /* Soft Backgrounds, Cards, Borders */
    --soft-pink: #CC84AC;    /* Secondary Accents, Subtle Gradients */
    --plum: #955178;         /* Badges, Special Accents, Icons */
    
    --white: #FFFFFF;
    --text-dark: #222222;
    --text-light: #555555;
    --light-sage-bg: rgba(150, 177, 173, 0.15); /* Very light sage for alternating sections */
}

/* Base Resets & Typography */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    scroll-behavior: smooth;
}

h1, h2, h3, h4 {
    color: var(--deep-green);
    margin-bottom: 1rem;
    line-height: 1.25;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 5rem 0;
}

.section-intro {
    font-size: 1.15rem;
    max-width: 800px;
    margin: 0 auto 3rem auto;
    text-align: center;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.inline-block { display: inline-block; }

/* Backgrounds */
.bg-light-sage {
    background-color: var(--light-sage-bg);
}

/* Navigation */
header {
    background-color: var(--deep-green);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--white);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary-teal);
}

/* Hero Section */
.hero {
    background-color: var(--deep-green);
    background-image: linear-gradient(135deg, var(--deep-green) 70%, #2a3d3c 100%);
    color: var(--white);
    padding: 8rem 2rem;
    text-align: center;
    position: relative;
    border-bottom: 4px solid var(--primary-teal);
}

.hero h1 {
    color: var(--white);
    font-size: 3.5rem;
    max-width: 900px;
    margin: 0 auto 1.5rem;
}

.hero p {
    color: #E0E7E6;
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-teal);
    color: var(--white);
    border: 2px solid var(--primary-teal);
}

.btn-primary:hover {
    background-color: #2b8e86;
    border-color: #2b8e86;
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 2px solid var(--primary-teal);
}

.btn-secondary:hover {
    background-color: var(--primary-teal);
}

.btn-outline-light {
    border: 2px solid var(--white);
    color: var(--white);
}

.btn-outline-light:hover {
    background-color: var(--white);
    color: var(--deep-green);
}

/* Badges */
.hero-badges {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.badge {
    padding: 0.5rem 1.2rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
}

.badge-teal { background-color: rgba(52, 171, 162, 0.2); color: var(--primary-teal); border: 1px solid var(--primary-teal); }
.badge-pink { background-color: rgba(204, 132, 172, 0.2); color: #FFB3DE; border: 1px solid var(--soft-pink); }
.badge-outline { border: 1px solid var(--sage); color: var(--sage); }
.badge-plum { background-color: var(--plum); color: var(--white); margin-bottom: 1.5rem; }

/* Grids and Layouts */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

/* Custom Bullet Points */
.custom-bullets {
    list-style: none;
    padding-left: 0;
}

.custom-bullets li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.custom-bullets li::before {
    content: "■";
    color: var(--primary-teal);
    position: absolute;
    left: 0;
    font-size: 0.8rem;
    top: 2px;
}

/* Cards */
.card-sage {
    background-color: var(--light-sage-bg);
    padding: 2.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--sage);
}

.cards .card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 8px;
    border-top: 4px solid var(--sage);
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    transition: transform 0.3s ease;
}

.cards .card:hover {
    transform: translateY(-5px);
    border-top-color: var(--primary-teal);
}

.card .tagline {
    font-weight: 600;
    color: var(--plum);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

/* Impact Grid */
.impact-grid .impact-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--sage);
    border-bottom: 4px solid var(--primary-teal);
}

.icon-placeholder {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--deep-green);
}

/* Use Cases */
.use-case-grid .use-case {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--sage);
}

.use-case-grid .use-case h3 {
    color: var(--deep-green);
    border-bottom: 2px solid var(--soft-pink);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.use-case-span {
    grid-column: 1 / -1; /* Make the 5th item span across the bottom */
}

/* Why Us / Comparison */
.comparison-grid {
    grid-template-columns: 1fr;
    max-width: 900px;
    margin: 0 auto;
}

.comparison-card {
    background: var(--white);
    padding: 3rem;
    border-radius: 8px;
    border: 2px solid var(--sage);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

/* CTA Band */
.cta-band {
    background-color: var(--deep-green);
    color: var(--white);
    text-align: center;
    padding: 6rem 2rem;
    border-top: 4px solid var(--soft-pink);
}

.cta-band h2 {
    color: var(--white);
    font-size: 2.5rem;
}

.cta-band p {
    color: #E0E7E6;
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Footer */
footer {
    background-color: #1A2625; /* Darker variant of Deep Green for contrast */
    color: var(--sage);
    padding: 4rem 0 2rem;
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    color: var(--white);
    font-size: 1.5rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.footer-links h4 {
    color: var(--white);
    font-size: 1.05rem;
    margin-bottom: 1.2rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.6rem;
    font-size: 0.9rem;
}

.footer-bottom {
    border-top: 1px solid rgba(150, 177, 173, 0.2);
    padding-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
}

.sustainability-note {
    margin-top: 1.5rem;
    font-style: italic;
    color: var(--sage);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Responsive Queries */
@media (max-width: 900px) {
    .split-layout { grid-template-columns: 1fr; gap: 2rem; }
    .footer-top { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
    .hero h1 { font-size: 2.5rem; }
    .hero-buttons { flex-direction: column; }
}

@media (max-width: 600px) {
    .nav-links { display: none; /* Add a hamburger menu in production */ }
    .use-case-span { grid-column: auto; }
}