/* ===== COLLAPSIBLE SIDEBAR NAVIGATION ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: -250px;
    width: 250px;
    height: 100vh;
    background-color: #111;
    border-right: 2px solid #00ff00;
    transition: left 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
}

.sidebar.open {
    left: 0;
}

.sidebar-header {
    padding: 1.5rem 1rem;
    border-bottom: 1px solid #333;
    text-align: center;
}

.sidebar-title {
    color: #00ff00;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.sidebar-subtitle {
    color: #666;
    font-size: 0.8rem;
}

.sidebar-nav {
    padding: 1rem 0;
}

.sidebar-link {
    display: block;
    padding: 1rem 1.5rem;
    color: #00ff00;
    text-decoration: none;
    border-bottom: 1px solid #222;
    transition: all 0.3s ease;
    position: relative;
}

.sidebar-link:hover {
    background-color: #222;
    border-left: 3px solid #ff00ff;
    padding-left: 1.4rem;
}

.sidebar-link.active {
    background-color: #333;
    border-left: 3px solid #00ff00;
    padding-left: 1.4rem;
}

.sidebar-link::before {
    content: '▶ ';
    color: #ff00ff;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-link:hover::before,
.sidebar-link.active::before {
    opacity: 1;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    border-top: 1px solid #333;
    text-align: center;
}

.sidebar-decoration {
    color: #666;
    font-size: 0.7rem;
    overflow: hidden;
    white-space: nowrap;
}

.sidebar-moving-text {
    display: inline-block;
    animation: sidebar-scroll 15s linear infinite;
    color: #ff00ff;
}

/* Hamburger Menu Button */
.menu-toggle {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    background: none;
    border: 2px solid #00ff00;
    color: #00ff00;
    padding: 0.5rem;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.menu-toggle:hover {
    background-color: #00ff00;
    color: #000;
    box-shadow: 0 0 10px #00ff00;
}

.menu-toggle.open {
    left: 260px;
    border-color: #ff00ff;
    color: #ff00ff;
}

.menu-toggle.open:hover {
    background-color: #ff00ff;
    color: #000;
    box-shadow: 0 0 10px #ff00ff;
}

/* Overlay */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Content shift when sidebar is open */
body.sidebar-open .main-header,
body.sidebar-open .main-content,
body.sidebar-open .retro-footer {
    margin-left: 250px;
    transition: margin-left 0.3s ease;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        left: -100%;
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .menu-toggle.open {
        left: calc(100% - 3rem);
    }
    
    body.sidebar-open .main-header,
    body.sidebar-open .main-content,
    body.sidebar-open .retro-footer {
        margin-left: 0;
    }
}

@keyframes sidebar-scroll {
    0% {
        transform: translateX(100%);
    }
    100% {
        transform: translateX(-100%);
    }
}