/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: var(--border-glass);
    z-index: var(--z-nav);
    transition: all var(--transition-normal);
    height: var(--header-height);
    /* Prevent scrolling issues on mobile */
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.98);
    box-shadow: var(--shadow-card);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-logo .logo-text {
    font-family: var(--font-tech);
    font-size: 1.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

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

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

/* Touch-friendly hamburger menu */
.nav-hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-normal);
}

.nav-hamburger:hover {
    background: rgba(255, 255, 255, 0.1);
}

.nav-hamburger .bar {
    width: 25px;
    height: 3px;
    background: var(--accent-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: var(--z-modal);
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
}

.modal-content {
    background: var(--bg-secondary);
    margin: 5% auto;
    padding: 0;
    border: var(--border-glass);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    color: var(--text-secondary);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    z-index: 1;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--accent-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

/* Social Links */
.social-links {
    position: fixed;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: var(--z-fixed);
}

.social-link {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: var(--border-glass);
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.social-link:hover {
    transform: translateX(-10px);
    background: var(--accent-primary);
    color: var(--bg-primary);
    box-shadow: var(--shadow-glow);
}

.social-link.github:hover {
    background: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.social-link.threads:hover {
    background: var(--accent-secondary);
    box-shadow: var(--shadow-glow-pink);
}

.social-link.instagram:hover {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    box-shadow: 0 0 20px rgba(188, 24, 136, 0.3);
}

/* Filter Buttons */
.projects-filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: transparent;
    border: var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transform: translateY(0);
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
    transition: all 0.4s ease;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    opacity: 0;
}

.filter-btn:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.filter-btn:active {
    transform: translateY(0) scale(0.95);
}

.filter-btn:active::before {
    width: 200px;
    height: 200px;
    opacity: 0.3;
}

.filter-btn.active {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(0);
}

/* Pulse Glow Effect */
.pulse-glow {
    animation: pulseGlow 2s infinite;
}

/* Floating Elements */
.floating-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 20s infinite linear;
}

.particle:nth-child(2n) {
    background: var(--accent-secondary);
    animation-duration: 25s;
}

.particle:nth-child(3n) {
    background: var(--accent-tertiary);
    animation-duration: 30s;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: var(--fs-small);
    animation: bounce 2s infinite;
}

.scroll-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}