/* =============== PROFESSIONAL HEADER =============== */
.site-header {
    background: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #f1f1f1;
}

.header-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #1f2937;
}

.logo-icon {
    font-size: 36px;
    margin-right: 12px;
    line-height: 1;
}

.logo-text {
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #1f2937;
}

.logo-tag {
    display: block;
    font-size: 0.75rem;
    color: #dc2626;
    font-weight: 600;
    margin-top: -4px;
}

/* Desktop Nav */
.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 32px;
}

.nav-links a {
    color: #374151;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: #dc2626;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #dc2626;
}

/* Mobile Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.hamburger {
    display: block;
    width: 26px;
    height: 3px;
    background: #1f2937;
    position: relative;
    border-radius: 3px;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 26px;
    height: 3px;
    background: #1f2937;
    border-radius: 3px;
    transition: all 0.3s;
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

/* Mobile Menu */
.mobile-menu {
    display: none;
    background: #ffffff;
    border-top: 1px solid #e5e7eb;
    box-shadow: 0 10px 15px rgba(0,0,0,0.1);
}

.mobile-nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav-links li a {
    display: block;
    padding: 18px 25px;
    color: #374151;
    text-decoration: none;
    font-size: 1.1rem;
    border-bottom: 1px solid #f3f4f6;
}

.mobile-nav-links a.active {
    background: #fef2f2;
    color: #dc2626;
}

/* Responsive */
@media (max-width: 768px) {
    .desktop-nav { display: none; }
    .mobile-menu-toggle { display: flex; }
    
    .mobile-menu.active {
        display: block;
    }
}