/* ================================
   Sidebar Navigation
   ================================ */

/* ============================================
   SIDEBAR MAIN
   ============================================ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--gradient-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    display: flex;
    flex-direction: column;
    z-index: var(--z-fixed);
    overflow-y: auto;
    overflow-x: hidden;
    box-shadow: var(--shadow-2xl);
    transition: all var(--transition-base);
}

/* Hide scrollbar */
.sidebar::-webkit-scrollbar {
    display: none;
}

.sidebar {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

/* ============================================
   SIDEBAR HEADER
   ============================================ */
.sidebar-header {
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-link {
    display: block;
    transition: transform var(--transition-base);
}

.logo-link:hover {
    transform: scale(1.05);
}

.logo {
    width: 160px;
    height: auto;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
    transition: all var(--transition-base);
}

/* ============================================
   MOBILE HEADER
   ============================================ */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--mobile-header-height);
    background: var(--gradient-dark);
    padding: 0 var(--spacing-lg);
    align-items: center;
    justify-content: space-between;
    z-index: 1030;
    box-shadow: var(--shadow-lg);
}

.mobile-menu-toggle {
    width: 45px;
    height: 45px;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-dark);
    font-size: var(--font-size-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.mobile-menu-toggle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.mobile-menu-toggle:active::before {
    width: 100px;
    height: 100px;
}

.mobile-menu-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-primary);
}

.mobile-logo {
    display: block;
}

.mobile-logo img {
    height: 50px;
    width: auto;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
}

/* ============================================
   NAVIGATION
   ============================================ */
.sidebar-nav {
    flex: 1;
    padding: 0 var(--spacing-md);
}

.nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--color-primary);
    transform: scaleY(0);
    transition: transform var(--transition-base);
}

.nav-link:hover {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.05);
    padding-left: calc(var(--spacing-md) + 8px);
}

.nav-link:hover::before {
    transform: scaleY(1);
}

.nav-link i {
    font-size: var(--font-size-lg);
    width: 24px;
    text-align: center;
    transition: all var(--transition-base);
}

.nav-link:hover i {
    transform: scale(1.1);
    color: var(--color-primary);
}

/* Active State */
.nav-item.active .nav-link {
    background: var(--color-primary);
    color: var(--color-dark);
    font-weight: var(--font-weight-semibold);
    box-shadow: var(--shadow-primary);
}

.nav-item.active .nav-link::before {
    display: none;
}

.nav-item.active .nav-link i {
    color: var(--color-dark);
    transform: scale(1.1);
}

/* ============================================
   SUBMENU
   ============================================ */
.submenu-arrow {
    margin-left: auto;
    font-size: var(--font-size-sm);
    transition: transform var(--transition-base);
}

.has-submenu.active .submenu-arrow {
    transform: rotate(180deg);
}

.submenu {
    max-height: 0;
    overflow: hidden;
    padding-left: 0;
    padding-top: 0;
    transition: max-height var(--transition-slow) var(--ease-in-out), padding var(--transition-slow) var(--ease-in-out);
}

.has-submenu.active .submenu {
    max-height: 300px;
    padding-top: var(--spacing-sm);
}

.submenu li {
    margin-bottom: var(--spacing-xs);
    opacity: 0;
    transform: translateX(-10px);
    animation: slideInSubmenu 0.3s ease forwards;
}

.has-submenu.active .submenu li:nth-child(1) { animation-delay: 0.1s; }
.has-submenu.active .submenu li:nth-child(2) { animation-delay: 0.2s; }
.has-submenu.active .submenu li:nth-child(3) { animation-delay: 0.3s; }

.submenu a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.submenu a:hover {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.05);
}

.submenu a.active {
    color: var(--color-primary);
    background: var(--color-primary-10);
    font-weight: var(--font-weight-semibold);
}

/* ============================================
   SIDEBAR FOOTER
   ============================================ */
.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    justify-content: center;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--color-white);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--color-primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

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

.social-link i {
    position: relative;
    z-index: 1;
    transition: all var(--transition-base);
}

.social-link:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary);
}

.social-link:hover i {
    color: var(--color-dark);
    transform: scale(1.2);
}

.contact-info {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.6);
    line-height: var(--line-height-relaxed);
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    color: inherit;
    transition: color var(--transition-fast);
}

.contact-info p:hover {
    color: var(--color-primary);
}

.contact-info i {
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.contact-info p:hover i {
    transform: scale(1.2);
}

/* ============================================
   SIDEBAR OVERLAY (MOBILE)
   ============================================ */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: var(--backdrop-blur);
    z-index: 1029;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1200px) {
    .sidebar {
        left: calc(-1 * var(--sidebar-width));
        box-shadow: none;
    }
    
    .sidebar.active {
        left: 0;
        box-shadow: var(--shadow-2xl);
    }
    
    .mobile-header {
        display: flex;
    }
}

@media (max-width: 576px) {
    .sidebar {
        width: 280px;
    }
    
    .mobile-header {
        padding: 0 var(--spacing-md);
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes slideInSubmenu {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}