:root {
    /* Color Palette */
    --color-bg-dark: #1a1a1a;
    --color-bg-darker: #121212;
    --color-bg-light: #f4f4f4;
    --color-text-main: #e0e0e0;
    --color-text-muted: #a0a0a0;
    --color-accent: #FF6600;
    /* Orange */
    --color-accent-hover: #e65c00;
    --color-white: #ffffff;

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

    /* Layout */
    --container-width: 1200px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--color-bg-dark);
    color: var(--color-text-main);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--color-white);
    color: var(--color-white);
    margin-left: var(--spacing-sm);
}

.btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-bg-dark);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
}

.logo .accent {
    color: var(--color-accent);
}

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

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
}

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

.btn-contact {
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-accent);
    border-radius: 4px;
    color: var(--color-accent);
}

.btn-contact:hover {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-nav-toggle .bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-white);
    margin: 5px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--header-height);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), rgba(26, 26, 26, 1));
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
    color: var(--color-white);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Sections General */
.section {
    padding: var(--spacing-xl) 0;
    position: relative;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    /* Parallax effect */
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.section .container {
    position: relative;
    z-index: 1;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--color-white);
}

/* Section Specific Backgrounds */
#expertise {
    background-image: url('assets/expertise_bg.png');
}

#expertise::before {
    background: rgba(18, 18, 18, 0.85);
    /* Dark overlay */
}

#use-cases {
    background-image: url('assets/use_cases_bg.png');
}

#use-cases::before {
    background: rgba(244, 244, 244, 0.9);
    /* Light overlay */
}

#team {
    background-image: url('assets/team_bg.png');
}

#team::before {
    background: rgba(18, 18, 18, 0.85);
    /* Dark overlay */
}

#contact {
    background-image: url('assets/contact_bg_tall.png');
}

#contact::before {
    background: rgba(244, 244, 244, 0.9);
    /* Light overlay */
}


/* Footer */
.footer {
    background-color: var(--color-bg-darker);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom {
    text-align: center;
    margin-top: var(--spacing-lg);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--color-bg-darker);
        padding: var(--spacing-md);
        transform: translateY(-100%);
        transition: transform 0.3s ease;
        z-index: 999;
        opacity: 0;
        pointer-events: none;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .mobile-nav-toggle {
        display: block;
    }

    .hero-title {
        font-size: 2.5rem;
    }
}

/* Cards & Grids */
.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
}

.card {
    background-color: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: 8px;
    transition: transform 0.3s ease, background-color 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.card:hover {
    transform: translateY(-5px);
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-white);
}

.card-text {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Section Variations */
.section-light {
    background-color: var(--color-bg-light);
    color: var(--color-bg-dark);
}

.section-title-dark {
    color: var(--color-bg-dark);
}

.feature-block {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--color-accent);
}

.feature-content h3 {
    color: var(--color-bg-dark);
    margin-bottom: var(--spacing-xs);
    font-size: 1.5rem;
}

.feature-content p {
    color: #555;
}

@media (max-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

/* Team Section */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.team-card {
    background-color: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: 8px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s ease;
}

.team-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
}

.team-avatar {
    width: 100px;
    height: 100px;
    background-color: var(--color-accent);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-sm);
}

.team-name {
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.team-role {
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.team-bio {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.contact-info h3 {
    color: var(--color-bg-dark);
    margin-bottom: var(--spacing-sm);
}

.contact-info p {
    color: #555;
    margin-bottom: var(--spacing-sm);
}

.contact-phone {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-accent) !important;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: var(--color-bg-dark);
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* Footer Updates */
.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

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

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

.footer-links a:hover {
    color: var(--color-accent);
}

@media (max-width: 768px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}