/* Layout Styles */

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--white);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--container-padding);
}

/* Hero Section */
.hero {
    padding: calc(var(--section-padding) + 4rem) 0 var(--section-padding);
    background: var(--dark-bg);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

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

.hero-content {
    z-index: 1;
}

.hero-visual {
    position: relative;
}

/* Services Section */
.services {
    padding: var(--section-padding);
    background: var(--section-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

/* Expertise Section */
.expertise {
    padding: var(--section-padding);
}

.expertise-container {
    display: grid;
    gap: var(--spacing-xl);
}

.expertise-category {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--card-shadow);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

/* Contact Section */
.contact-section {
    padding: var(--section-padding);
    background: var(--section-bg);
}

.contact-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
}

/* Footer */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: var(--section-padding) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

/* Responsive Layout */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-visual {
        order: -1;
    }

    .contact-cta {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
    }

    .expertise-grid {
        grid-template-columns: 1fr;
    }
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 992px) {
    .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }