/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(6, 9, 34, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-fixed);
    transition: all var(--transition-normal);
}

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

/* Logo */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
    font-size: var(--text-xl);
    font-weight: var(--font-weight-bold);
    transition: color var(--transition-normal);
}

.logo:hover {
    color: var(--primary);
}

.logo-img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    margin-right: var(--space-3);
}

/* Navigation Menu */
.nav-menu {
    display: none;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-8);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-normal);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Navigation Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Mobile Toggle */
.nav-toggle {
    display: block;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--space-2);
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    margin: 4px 0;
    transition: all var(--transition-normal);
}

/* Mobile Menu Active State */
.nav-menu.active {
    display: flex;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(6, 9, 34, 0.98);
    backdrop-filter: blur(20px);
    padding: var(--space-6);
    gap: 0;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    border-top: 1px solid var(--border-color);
    animation: slideDown 0.3s ease;
}

.nav-menu.active .nav-item {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-menu.active .nav-link {
    display: block;
    padding: var(--space-4);
    font-size: var(--text-lg);
}

/* Hamburger Animation */
.nav-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Prevent body scroll when menu is open */
body.nav-open {
    overflow: hidden;
}

/* Slide down animation */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Desktop Navigation */
@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }

    .nav-toggle {
        display: none;
    }
}