:root {
    /* Brand Colors - Refined */
    --blue-deep: #0f172a; /* Darker, richer navy */
    --blue-mid: #1e40af;   /* Vibrant mid-blue */
    --teal: #0e7490;       /* Deep teal */
    --accent: #0ea5e9;     /* Bright sky blue for accents */
    
    /* Neutrals */
    --text-main: #334155;
    --text-light: #64748b;
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --bg-subtle: #f1f5f9;
    
    /* UI Elements */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Header & Nav */
header {
    display: flex;
    position: sticky;
    top: 0;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    z-index: 100;
    transition: all 0.3s ease;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    color: var(--blue-deep);
}

.brand img {
    height: 48px;
    width: auto;
    display: block;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-weight: 800;
    font-size: 20px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.brand-tagline {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 500;
}

nav {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-toggle {
    display: none;
    background: transparent;
    border: 0;
    color: var(--blue-deep);
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
}

.nav-toggle svg { display: block; }

/* Off-canvas nav backdrop */
.nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}
.nav-backdrop.visible { opacity: 1; pointer-events: auto; }
body.nav-open { overflow: hidden; }

nav a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

nav a:hover {
    color: var(--blue-mid);
    background: var(--bg-subtle);
}

nav a.cta {
    background: var(--blue-mid);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

nav a.cta:hover {
    background: var(--blue-deep);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Hero Section */
.hero {
    display: grid;
    grid-template-columns: 1fr 480px;
    gap: 64px;
    padding: 80px 32px;
    align-items: center;
    max-width: 1280px;
    margin: 0 auto;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(14, 116, 144, 0.1);
    color: var(--teal);
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: fit-content;
}

.hero h1 {
    font-size: 48px;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--blue-deep);
    margin: 0;
}

.lead {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.6;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 16px;
}

.cta-primary {
    background: var(--blue-mid);
    color: #fff;
    box-shadow: var(--shadow-md);
}

.cta-primary:hover {
    background: var(--blue-deep);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-secondary {
    background: #fff;
    color: var(--blue-mid);
    border: 1px solid var(--blue-mid);
}

.cta-secondary:hover {
    background: var(--bg-subtle);
    transform: translateY(-2px);
}

/* Feature Cards (Hero) */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.card {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.04);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(14, 165, 233, 0.2);
}

.card h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--blue-deep);
}

.card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.5;
}

/* Featured Product Aside */
.featured-product {
    background: linear-gradient(135deg, var(--teal), var(--blue-mid));
    padding: 32px;
    border-radius: var(--radius-lg);
    color: #fff;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.featured-product::before {
    content: '';
    position: absolute;
    top: 0; right: 0; bottom: 0; left: 0;
    background: linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.1) 45%, transparent 50%);
    background-size: 200% 200%;
    animation: shine 6s infinite linear;
}

@keyframes shine {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.featured-product h3 {
    margin-top: 0;
    font-size: 20px;
    margin-bottom: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding-bottom: 12px;
}

.featured-product ul {
    list-style: none;
    padding: 0;
    margin-top: 16px;
}

.featured-product li {
    padding: 4px 0;
    font-size: 14px;
    opacity: 0.9;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.featured-product li:last-child {
    border-bottom: none;
}

/* Products Section */
.section-products {
    padding: 80px 32px;
    background: #fff;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-header h2 {
    font-size: 36px;
    color: var(--blue-deep);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    max-width: 1280px;
    margin: 0 auto;
}

.product-group {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid rgba(0,0,0,0.06);
    overflow: hidden;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-group:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.product-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-group h4 {
    font-size: 20px;
    color: var(--blue-deep);
    margin-bottom: 8px;
}

.features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.feature {
    background: var(--bg-subtle);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-main);
    font-weight: 500;
}

/* Industries Section */
.section-industries {
    padding: 80px 32px;
    background: var(--bg-body);
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 1280px;
    margin: 0 auto;
    align-items: start;
}

.list-styled {
    list-style: none;
    padding: 0;
}

.list-styled li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    color: var(--text-main);
}

.list-styled li::before {
    content: '•';
    color: var(--accent);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Sustainability */
.section-sustainability {
    padding: 80px 32px;
    background: linear-gradient(180deg, #f0f9ff, #fff);
    text-align: center;
}

/* Footer */
footer {
    background: var(--blue-deep);
    color: #fff;
    padding: 64px 32px 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
    max-width: 1280px;
    margin: 0 auto 48px;
}

.footer-col h4 {
    color: #fff;
    margin-bottom: 24px;
    font-size: 18px;
}

.footer-links a {
    display: block;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 32px;
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 14px;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        padding: 48px 24px;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .featured-product {
        margin-top: 32px;
    }
}

@media (max-width: 768px) {
    .nav-toggle { display: block; }
    
    header nav {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 80%;
        max-width: 300px;
        background: #fff;
        flex-direction: column;
        padding: 80px 24px;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: -4px 0 24px rgba(0,0,0,0.1);
        z-index: 95;
    }
    
    header.nav-open nav {
        transform: translateX(0);
    }
    
    .two-col {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
}

/* Utilities */
.text-small { font-size: 14px; color: var(--text-light); }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }