/* Header and Navigation Styles */

/* Fixed Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(10, 0, 20, 0.7);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-base);
}

.header.scrolled {
    padding: 0.75rem 0;
    background: rgba(10, 0, 20, 0.95);
    box-shadow: var(--shadow-lg);
    border-bottom-color: var(--glass-border-purple);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--purple-400), transparent);
    transform: translateX(-50%);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--pure-white);
}

.nav-link:hover::before {
    width: 100%;
}

.nav-link.active {
    color: var(--pure-white);
}

.nav-link.active::before {
    width: 100%;
    background: var(--purple-400);
}

.nav-buttons {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Mobile Menu */
.mobile-toggle {
    display: none;
    width: 48px;
    height: 48px;
    background: var(--glass-purple);
    border: 1px solid var(--glass-border-purple);
    border-radius: 12px;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-base);
}

.mobile-toggle:hover {
    background: rgba(139, 92, 246, 0.2);
    border-color: var(--purple-400);
}

.mobile-toggle span {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--purple-200);
    transition: all var(--transition-base);
}

.mobile-toggle span:nth-child(1) { top: 16px; }
.mobile-toggle span:nth-child(2) { top: 23px; }
.mobile-toggle span:nth-child(3) { top: 30px; }

.mobile-toggle.active span:nth-child(1) {
    top: 23px;
    transform: translateX(-50%) rotate(45deg);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    top: 23px;
    transform: translateX(-50%) rotate(-45deg);
}

/* Mobile Menu Overlay */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 0, 20, 0.98);
    backdrop-filter: blur(24px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: var(--space-lg);
}

.mobile-nav {
    list-style: none;
    text-align: center;
    margin-bottom: var(--space-xl);
}

.mobile-nav li {
    margin: var(--space-md) 0;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.mobile-menu.active .mobile-nav li {
    opacity: 1;
    transform: translateY(0);
}

.mobile-menu.active .mobile-nav li:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.active .mobile-nav li:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.active .mobile-nav li:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.active .mobile-nav li:nth-child(4) { transition-delay: 0.25s; }

.mobile-nav a {
    color: var(--pure-white);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 500;
    transition: all var(--transition-base);
    background: linear-gradient(to right, var(--purple-400), var(--purple-400));
    background-size: 0% 2px;
    background-position: left bottom;
    background-repeat: no-repeat;
    padding-bottom: 4px;
}

.mobile-nav a:hover {
    background-size: 100% 2px;
    color: var(--purple-200);
}

.mobile-menu-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    width: 100%;
    max-width: 300px;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.mobile-menu.active .mobile-menu-buttons {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.3s;
}