/* ===== CSS Variables ===== */
:root {
    /* Colors - Deep Marine Theme (muted, professional) */
    --color-primary: #05445e;      /* Deep Ocean */
    --color-primary-dark: #032f47;
    --color-primary-light: #189ab4;
    --color-secondary: #75e6da;    /* Soft Aqua */
    --color-accent: #d4a017;       /* Muted Gold */
    --color-success: #2a9d8f;      /* Green */
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-gray-100: #f1f3f5;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;
    --color-black: #000000;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Container */
    --container-max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: #eef1f5;
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: #eef1f5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
    margin-bottom: var(--spacing-md);
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
    width: 100%;
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-full {
    width: 100%;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    padding: var(--spacing-sm) 0;
    background-color: rgba(255, 255, 255, 0.98);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-primary);
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-text {
    display: none;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    font-weight: 500;
    color: var(--color-gray-700);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-cta {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
}

.nav-cta:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-gray-700);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 3px;
    background-color: var(--color-gray-700);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0;
    margin-top: 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,106.7C1248,96,1344,96,1392,96L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
}

.hero-title .highlight {
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-bottom: var(--spacing-3xl);
    flex-wrap: wrap;
}

.hero-features {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    flex-wrap: wrap;
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: rgba(255, 255, 255, 0.15);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
}

.feature-icon {
    width: 20px;
    height: 20px;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.hero-scroll a {
    color: var(--color-white);
    opacity: 0.8;
}

.hero-scroll svg {
    width: 30px;
    height: 30px;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ===== Animations ===== */
.animate-fade-in {
    animation: fadeIn 0.8s ease-out;
}

.animate-fade-in-delay {
    animation: fadeIn 0.8s ease-out 0.2s backwards;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 0.8s ease-out 0.4s backwards;
}

.animate-fade-in-delay-3 {
    animation: fadeIn 0.8s ease-out 0.6s backwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Products Section ===== */
.products-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-off-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Product Tabs */
.product-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    color: var(--color-gray-600);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.tab-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.tab-btn.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.product-card {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.product-card.featured {
    border: 2px solid var(--color-primary);
}

.product-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background-color: var(--color-accent);
    color: var(--color-gray-900);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
}

.product-badge.popular {
    background-color: var(--color-success);
    color: var(--color-white);
}

.product-badge.premium {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.product-badge.commercial {
    background-color: var(--color-gray-800);
    color: var(--color-white);
}

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #dfe7ec 0%, #c9d6df 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* image fallback keeps box size when a photo is missing */
.product-image img[src*="web_images"]:not([src*="."]) { display: none; }

.image-placeholder {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: #8aa5b5;
    letter-spacing: 0.02em;
}

.image-placeholder-large {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--color-gray-200) 0%, var(--color-gray-300) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 2.5rem;
    color: var(--color-gray-500);
    border-radius: var(--radius-lg);
}

.product-info {
    padding: var(--spacing-lg);
}

.product-name {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.product-description {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
    font-size: 0.9375rem;
}

.product-specs {
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.product-specs li {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

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

.product-price {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

/* ===== Why Electric Section ===== */
.why-electric-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.benefit-card {
    text-align: center;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.benefit-card:hover {
    background-color: var(--color-off-white);
    transform: translateY(-3px);
}

.benefit-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-primary);
}

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

.benefit-card h3 {
    margin-bottom: var(--spacing-sm);
}

.benefit-card p {
    color: var(--color-gray-600);
    font-size: 0.9375rem;
}

/* Comparison Table */
.comparison-section {
    margin-top: var(--spacing-3xl);
}

.comparison-section h3 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.comparison-table-wrapper {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.comparison-table th {
    background-color: var(--color-gray-900);
    color: var(--color-white);
    font-weight: 600;
}

.comparison-table th.electric-header {
    background-color: var(--color-primary);
}

.comparison-table th.gas-header {
    background-color: var(--color-gray-700);
}

.comparison-table tr:hover {
    background-color: var(--color-gray-100);
}

.comparison-table .electric {
    color: var(--color-success);
    font-weight: 600;
}

.comparison-table .gas {
    color: var(--color-gray-600);
}

/* ===== About Section ===== */
.about-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-off-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-text h2 {
    margin-bottom: var(--spacing-lg);
}

.about-text p {
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-600);
}

.about-features {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.about-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.about-feature svg {
    width: 24px;
    height: 24px;
    color: var(--color-success);
    flex-shrink: 0;
}

.about-feature span {
    font-weight: 500;
}

/* ===== Contact Section ===== */
.contact-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
}

.contact-info h3 {
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-item svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.contact-cta {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background-color: var(--color-off-white);
    border-radius: var(--radius-lg);
}

.contact-cta h4 {
    margin-bottom: var(--spacing-md);
}

.contact-cta ul {
    list-style: disc;
    padding-left: var(--spacing-lg);
}

.contact-cta li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-600);
}

/* Contact Form */
.contact-form-wrapper {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
    border: 1px solid var(--color-gray-200);
}

.contact-form {
    display: grid;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-md);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background-color: var(--color-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 119, 182, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-note {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    text-align: center;
    margin-top: var(--spacing-sm);
}

/* ===== Footer ===== */
.footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    margin-bottom: var(--spacing-lg);
    font-size: 0.9375rem;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-gray-800);
    border-radius: var(--radius-full);
    color: var(--color-white);
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.footer-social svg {
    width: 20px;
    height: 20px;
}

.footer-links h4,
.footer-products h4,
.footer-contact h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer-links ul,
.footer-products ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a,
.footer-products a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-products a:hover {
    color: var(--color-white);
}

.footer-contact p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.9375rem;
}

.footer-contact a {
    color: var(--color-gray-400);
}

.footer-contact a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.footer-bottom p {
    margin-bottom: var(--spacing-xs);
}

/* ===== Responsive Design ===== */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .hamburger {
        background-color: transparent;
    }
    
    .nav-toggle.active .hamburger::before {
        top: 0;
        transform: rotate(45deg);
    }
    
    .nav-toggle.active .hamburger::after {
        top: 0;
        transform: rotate(-45deg);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-cta .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .product-tabs {
        flex-direction: column;
        align-items: stretch;
    }
    
    .tab-btn {
        text-align: center;
    }
    
    .contact-form-wrapper {
        padding: var(--spacing-lg);
    }
}

/* ===== Print Styles ===== */
@media print {
    .navbar,
    .hero-scroll,
    .contact-form,
    .footer {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    .container {
        max-width: 100%;
    }
}