/* ===== MODERN VERTICAL SCROLL NAVIGATION ===== */
.scroll-nav {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.scroll-nav.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-nav-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.scroll-nav-progress {
    width: 3px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    position: relative;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.scroll-nav-progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(180deg, #667eea, #764ba2, #8b5fbf);
    border-radius: 2px;
    height: 0%;
    transition: height 0.1s ease;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.4);
}

.scroll-nav-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-left: 1rem;
}

.scroll-nav-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    backdrop-filter: blur(15px);
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.scroll-nav-item:hover {
    background: rgba(255, 255, 255, 0.98);
    transform: translateX(-8px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
}

.scroll-nav-item.active {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.4);
    transform: translateX(-8px) scale(1.02);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.2);
}

.scroll-nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #6c757d;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    border: none;
    box-shadow: none;
}

.scroll-nav-dot::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.scroll-nav-item:hover .scroll-nav-dot {
    background: #667eea;
    transform: scale(1.2);
    box-shadow: 0 0 8px rgba(102, 126, 234, 0.3);
}

.scroll-nav-item:hover .scroll-nav-dot::after {
    border-color: rgba(102, 126, 234, 0.2);
    transform: translate(-50%, -50%) scale(1.5);
}

.scroll-nav-item.active .scroll-nav-dot {
    background: linear-gradient(135deg, #667eea, #764ba2);
    transform: scale(1.3);
    box-shadow: 0 0 12px rgba(102, 126, 234, 0.4);
}

.scroll-nav-item.active .scroll-nav-dot::after {
    border-color: rgba(102, 126, 234, 0.3);
    transform: translate(-50%, -50%) scale(1.8);
}

.scroll-nav-label {
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: var(--fw-semibold);
    color: #2c3e50;
    letter-spacing: 0.01em;
    white-space: nowrap;
    opacity: 1;
    transform: translateX(0);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    pointer-events: none;
    text-shadow: none;
    background: none;
    padding: 0;
    border-radius: 0;
    border: none;
}

.scroll-nav-item:hover .scroll-nav-label {
    color: #667eea;
    font-weight: var(--fw-bold);
}

.scroll-nav-item.active .scroll-nav-label {
    color: #667eea;
    font-weight: var(--fw-bold);
}

/* ===== RESPONSIVE DESIGN FOR SCROLL NAV ===== */
@media (max-width: 1200px) {
    .scroll-nav {
        right: 1rem;
    }
    
    .scroll-nav-progress {
        height: 150px;
    }
    
    .scroll-nav-items {
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    .scroll-nav {
        display: none;
    }
}

/* Enhanced scroll effects for desktop */
@media (min-width: 769px) {
    .scroll-nav-item {
        transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    
    .scroll-nav-item:hover {
        transform: translateX(-10px) scale(1.05);
    }
    
    .scroll-nav-item.active {
        transform: translateX(-10px) scale(1.05);
    }
}