/* ===================================
   HEADER STYLES
   =================================== */

.header {
    background: #ffffff;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-lg);
}

/* Logo Section */
.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    flex-shrink: 0;
}

.logo svg {
    display: block;
    filter: drop-shadow(0 2px 4px rgba(16, 185, 129, 0.2));
    transition: transform var(--transition-base);
}

.logo:hover svg {
    transform: scale(1.05);
}

/* Brand */
.brand {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1;
    letter-spacing: -0.02em;
}

.brand-tagline {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
    line-height: 1;
    margin-top: 0.25rem;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-700);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: transform var(--transition-base);
}

.nav a:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.nav a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    color: var(--gray-700);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .header-content {
        padding: var(--spacing-sm) 0;
    }
    
    .brand-name {
        font-size: 1.25rem;
    }
    
    .brand-tagline {
        font-size: 0.75rem;
    }
    
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--gray-200);
    }
    
    .nav.active {
        display: flex;
    }
    
    .nav a {
        width: 100%;
        text-align: center;
        padding: var(--spacing-sm);
    }
    
    .mobile-menu-btn {
        display: block;
    }
}

@media (max-width: 480px) {
    .logo svg {
        width: 32px;
        height: 32px;
    }
    
    .brand-name {
        font-size: 1.125rem;
    }
    
    .brand-tagline {
        display: none;
    }
}