/* Layout components - Header, Footer, Grid */

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 60px;
    border-bottom: 1px solid rgba(74, 158, 255, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo {
    height: 50px;
    width: auto;
    opacity: 0.9;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.nav-link.active {
    background: linear-gradient(135deg, #4A9EFF 0%, #007BFF 100%);
    color: #ffffff;
    font-weight: 600;
}

/* Footer */
.footer {
    padding: 20px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 40px;
    gap: 20px;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(74, 158, 255, 0.2);
}

.footer-logo {
    width: 100px;
    height: auto;
    opacity: 0.9;
}

.footer-contact {
    display: flex;
    align-items: center;
}

.phone-number {
    font-size: 0.95rem;
    font-weight: 300;
    color: var(--text-secondary);
}

/* Main content container */
.presentation-container {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 60px;
    margin-top: 80px;
}

.content {
    text-align: center;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
}

/* Navigation layout */
.navigation-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

/* Responsive grid */
.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));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Flexbox utilities */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-column {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.gap-sm {
    gap: var(--spacing-sm);
}

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

.gap-lg {
    gap: var(--spacing-lg);
}