:root {
    /* Color Palette */
    --color-primary: #FFC800;
    /* Energy Yellow */
    --color-primary-dark: #E0B000;
    --color-secondary: #1A1A1A;
    /* Dark Background */
    --color-secondary-light: #2A2A2A;
    --color-text: #FFFFFF;
    --color-text-muted: #CCCCCC;
    --color-accent: #FFFFFF;
    /* White for accents */
    --color-white: #FFFFFF;
    --color-black: #000000;

    /* Typography */
    --font-family-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-size-base: 16px;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 3rem;
    --font-size-4xl: 4rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: var(--font-family-sans);
    background-color: var(--color-secondary);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    font-weight: 700;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 200, 0, 0.3);
}

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

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

.section-title {
    font-size: var(--font-size-3xl);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(to right, var(--color-white), var(--color-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 1s ease forwards;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-primary);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 60px;
    width: auto;
    border-radius: 4px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a:not(.btn) {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-secondary);
    opacity: 0.8;
}

.nav-links a:not(.btn):hover {
    opacity: 1;
    color: var(--color-black);
}

.nav-links .btn {
    background-color: var(--color-white);
    color: var(--color-secondary);
    border: 2px solid var(--color-white);
}

.nav-links .btn:hover {
    background-color: transparent;
    color: var(--color-secondary);
    border-color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: none;
}

/* Hero Section */
#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('./public/images/index-bg.jpeg');
    /* Placeholder Hero Image */
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

#hero h1 {
    font-size: clamp(2.5rem, 5vw, 5rem);
    margin-bottom: 1.5rem;
    line-height: 1.1;
    background: linear-gradient(to right, #ffffff, #e0e0e0);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

#hero p {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    margin-bottom: 2.5rem;
    color: var(--color-text-muted);
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* Section Padding */
.section-padding {
    padding: var(--spacing-xl) 0;
}

.bg-darker {
    background-color: #111;
}

/* Overview */
.overview-content {
    align-items: center;
}

.overview-text p {
    margin-bottom: 1.5rem;
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

.image-placeholder {
    background-color: #333;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    color: #666;
    font-weight: 600;
    border: 1px dashed #444;
}

/* Business Models */
.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    margin-top: -3rem;
    margin-bottom: 4rem;
    font-size: 1.2rem;
}

.card {
    background-color: var(--color-secondary-light);
    border-radius: 16px;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border-color: var(--color-primary);
}

.card-header {
    background-color: rgba(255, 255, 255, 0.03);
    padding: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    margin: 0;
    font-size: 1.5rem;
}

.badge {
    background-color: rgba(255, 200, 0, 0.1);
    color: var(--color-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.card-body {
    padding: 2rem;
}

.card-body h4 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.feature-list {
    margin: 1.5rem 0;
}

.feature-list li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--color-text-muted);
}

.feature-list li::before {
    content: "✓";
    color: var(--color-primary);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.full-width {
    width: 100%;
    text-align: center;
}

/* Gallery */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 250px);
    /* Adjusted height for better proportion */
    gap: 1rem;
}

.gallery-item {
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* First Row: 2 Large Images */
.item-1 {
    grid-column: 1 / 3;
    grid-row: 1 / 2;
}

.item-2 {
    grid-column: 3 / 5;
    grid-row: 1 / 2;
}

/* Second Row: 4 Small Images */
.item-3 {
    grid-column: 1 / 2;
    grid-row: 2 / 3;
}

.item-4 {
    grid-column: 2 / 3;
    grid-row: 2 / 3;
}

.item-5 {
    grid-column: 3 / 4;
    grid-row: 2 / 3;
}

.item-6 {
    grid-column: 4 / 5;
    grid-row: 2 / 3;
}

/* Technology */
.tech-item {
    background-color: var(--color-secondary-light);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: transform var(--transition-normal);
}

.tech-item:hover {
    transform: translateY(-5px);
}

.tech-item .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tech-item h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.tech-item ul {
    text-align: left;
    display: inline-block;
}

.tech-item li {
    margin-bottom: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Contact */
.contact-wrapper {
    background-color: var(--color-secondary-light);
    border-radius: 20px;
    overflow: hidden;
}

.contact-info {
    padding: 3rem;
    background-color: var(--color-primary);
    color: var(--color-secondary);
}

.contact-info h3 {
    color: var(--color-secondary);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.contact-info p {
    margin-bottom: 2rem;
    opacity: 0.9;
}

.info-item {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.contact-form {
    padding: 3rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--color-white);
    font-family: inherit;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: rgba(255, 255, 255, 0.1);
}

/* Footer */
footer {
    background-color: #000;
    padding: 3rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-white);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.copyright {
    color: #666;
    font-size: 0.8rem;
    text-align: center;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        /* Implement mobile menu later if needed */
    }

    .mobile-menu-toggle {
        display: block;
        /* Add toggle styles */
    }

    .gallery-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }

    .item-1 {
        grid-column: auto;
        grid-row: auto;
        height: 300px;
    }

    .item-2,
    .item-3,
    .item-4 {
        grid-column: auto;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

/* Lightbox */
.lightbox {
    position: fixed;
    z-index: 2000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lightbox.active .lightbox-img {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
    z-index: 2001;
}

.lightbox-close:hover {
    color: var(--color-primary);
}

.lightbox-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: none;
    font-size: 30px;
    padding: 15px;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2001;
}

.lightbox-btn:hover {
    background-color: var(--color-primary);
    color: #000;
}

.prev-btn {
    left: 20px;
}

.next-btn {
    right: 20px;
}

@media (max-width: 768px) {
    .lightbox-btn {
        padding: 10px;
        font-size: 20px;
        width: 40px;
        height: 40px;
    }
}