/* Reset এবং বেসিক স্টাইল */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}
html {
    scroll-behavior: smooth;
}

body {
    background: linear-gradient(135deg, #0f1a2c 0%, #1e2a3d 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: 100px;
    overflow-x: hidden;
    color: #e6edf3;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 30px;
}

/* ============Header======------------------=== */
/* হেডার স্টাইলিং */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(18, 25, 40, 0.92);
    backdrop-filter: blur(15px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    overflow: hidden;
}

/* হেডারের চারপাশে ইফেক্ট */
#header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, 
        transparent, 
        #78beff, 
        #96aaff, 
        #78beff, 
        transparent
    );
    animation: shimmer 3s infinite linear;
    background-size: 200% 100%;
    z-index: 2;
}

#header::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 10%, rgba(120, 190, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 90%, rgba(150, 170, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 50% 20%, rgba(180, 200, 255, 0.03) 0%, transparent 30%),
        radial-gradient(circle at 20% 80%, rgba(120, 190, 255, 0.04) 0%, transparent 35%);
    pointer-events: none;
    z-index: 1;
}

#header.scrolled {
    padding: 0;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.35);
    background-color: rgba(18, 25, 40, 0.98);
    border-bottom: 1px solid rgba(120, 190, 255, 0.25);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 10px;
    position: relative;
    transition: all 0.4s ease;
    z-index: 3;
}

#header.scrolled .navbar {
    padding: 10px 0;
}


/* লোগো স্টাইলিং */
.nav-left .logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-size: 1.9rem;
    font-weight: 800;
    color: #f0f4f8;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    overflow: hidden;
    padding: 25px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(120, 190, 255, 0.12), rgba(150, 170, 255, 0.06));
    background-color: rgb(255, 255, 255);
}

.nav-left .logo img {
    transition: all 0.5s ease;
    filter: drop-shadow(0 0 8px rgba(120, 190, 255, 0.4));
    width: auto;
}

.nav-left .logo:hover img {
    transform: rotateY(360deg) scale(1.4);
    filter: drop-shadow(0 0 12px rgba(150, 170, 255, 0.6));
}

.nav-left .logo span {
    color: #96aaff;
    position: relative;
    transition: all 0.3s ease;
    background: linear-gradient(90deg, #96aaff, #78beff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav-left .logo:hover span {
    background: linear-gradient(90deg, #78beff, #96aaff);
    -webkit-background-clip: text;
    background-clip: text;
}

.nav-left .logo::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    padding: 2px;
    background: linear-gradient(135deg, #78beff, #96aaff, #b0c4ff);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.nav-left .logo:hover::before {
    opacity: 1;
}

.nav-left .logo::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #78beff, #96aaff);
    transition: width 0.6s ease;
}

.nav-left .logo:hover::after {
    width: 100%;
}

/* নেভিগেশন মেনু */
.nav-center {
    display: flex;
    justify-content: center;
    flex: 1;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 60px;
    position: relative;
}

.nav-item {
    text-decoration: none;
    color: #e6f2ff;
    font-weight: 600;
    font-size: 1.5rem;
    padding: 10px 5px;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    letter-spacing: 0.3px;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(120, 190, 255, 0.15), transparent);
    transition: left 0.8s ease;
}

.nav-item:hover::before {
    left: 100%;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #78beff, #96aaff, #b0c4ff);
    border-radius: 2px;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 0 10px rgba(120, 190, 255, 0.5);
}

.nav-item:hover {
    color: #ffffff;
    transform: translateY(-3px);
    text-shadow: 0 0 15px rgba(120, 190, 255, 0.5);
}

.nav-item:hover::after {
    width: 100%;
    height: 2px;
}

.nav-item.active {
    color: #ffffff;
}

.nav-item.active::after {
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #ffb0d8, #ff8cc6);
}

/* কল নাউ বাটন */
.nav-right .call-btn {
    display: inline-flex;
    align-items: center;
    background: linear-gradient(135deg, #2a4a8c 0%, #1a366e 100%);
    color: white;
    text-decoration: none;
    padding: 16px 32px;
    border-radius: 14px;
    font-weight: 700;
    font-size: 1.1rem;
    overflow: hidden;
    position: relative;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 30px rgba(42, 74, 140, 0.4);
    z-index: 1;
    border: 1px solid rgba(120, 190, 255, 0.25);
}

.nav-right .call-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #4a8cff 0%, #2a6eff 100%);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.nav-right .call-btn:hover {
    transform: translateY(-6px) scale(1.05);
    box-shadow: 0 20px 40px rgba(74, 140, 255, 0.5);
    border-color: rgba(120, 190, 255, 0.4);
}

.nav-right .call-btn:hover::before {
    opacity: 1;
}

.nav-right .call-btn i {
    margin-right: 12px;
    font-size: 1.2rem;
    transition: all 0.5s ease;
    filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.5));
}

.nav-right .call-btn:hover i {
    transform: rotate(25deg) scale(1.3);
    animation: pulse 1s infinite alternate;
}

@keyframes pulse {
    from {
        filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.5));
    }
    to {
        filter: drop-shadow(0 0 10px rgba(120, 190, 255, 0.8));
    }
}

.nav-right .call-btn::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 40px;
    height: 200%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transform: rotate(30deg);
    transition: left 0.8s ease;
}

.nav-right .call-btn:hover::after {
    left: 120%;
}

/* মোবাইল মেনু বাটন */
.mobile-menu-btn {
    display: none;
    background: linear-gradient(135deg, #4a8cff, #2a4a8c);
    border: none;
    color: white;
    width: 52px;
    height: 52px;
    border-radius: 14px;
    font-size: 1.6rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 8px 20px rgba(74, 140, 255, 0.4);
    z-index: 1001;
    position: relative;
    overflow: hidden;
}

.mobile-menu-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #78beff, #4a8cff);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.mobile-menu-btn:hover {
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 12px 25px rgba(120, 190, 255, 0.5);
}

.mobile-menu-btn:hover::before {
    opacity: 1;
}

.mobile-menu-btn i {
    position: relative;
    z-index: 1;
    transition: transform 0.4s ease;
}

.mobile-menu-btn:hover i {
    transform: scale(1.2);
}

/* ============Footer======------------------=== */
/* Footer General Styles */
#footer {
    background: linear-gradient(135deg, #0f1a2c 0%, #1a2438 100%);
    color: #ffffff;
    padding: 120px 0 40px;
    position: relative;
    overflow: hidden;
    margin-top: 100px;
    border-top: 1px solid rgba(120, 190, 255, 0.15);
}

/* Background Accent with Animation */
#footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, 
        transparent, 
        #78beff, 
        #96aaff, 
        #78beff, 
        transparent
    );
    animation: shimmer 3s infinite linear;
    background-size: 200% 100%;
}

/* Particle Background Effect */
#footer::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 190, 255, 0.07) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(150, 170, 255, 0.07) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

/* Footer Wrapper with Advanced Grid */
.footer-wrapper {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 60px;
    margin-bottom: 70px;
    align-items: start;
}

/* Brand Section with Elegant Effects */
.footer-brand {
    position: relative;
    padding: 30px;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(120, 190, 255, 0.15);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.footer-brand::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, 
        transparent 0%, 
        rgba(120, 190, 255, 0.07) 50%, 
        transparent 100%);
    transform: translateX(-100%);
    transition: transform 0.8s ease;
}

.footer-brand:hover::before {
    transform: translateX(100%);
}

.footer-brand:hover {
    transform: translateY(-8px);
    border-color: rgba(120, 190, 255, 0.35);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 30px rgba(120, 190, 255, 0.15);
}

.footer-logo-img {
    max-width: 200px;
    max-height: 200px;
    margin-bottom: 25px;
    transform-origin: center;
    background-size: cover;
    border-radius: 5%;
}

.footer-brand:hover .footer-logo-img {
    transform: scale(1.05) rotate(-2deg);
    filter: drop-shadow(0 10px 25px rgba(120, 190, 255, 0.5));
    transition: transform 0.5s ease, filter 0.5s ease;
    border-radius: 0%;
}

.footer-tagline {
    font-size: 16px;
    color: #d1dde8;
    line-height: 1.8;
    font-style: italic;
    position: relative;
    padding: 20px;
    border-left: 3px solid transparent;
    background: linear-gradient(90deg, 
        rgba(120, 190, 255, 0.07) 0%, 
        transparent 100%);
    border-radius: 0 8px 8px 0;
    transition: all 0.4s ease;
}

.footer-brand:hover .footer-tagline {
    color: #ffffff;
    border-left-color: #78beff;
    padding-left: 25px;
    background: linear-gradient(90deg, 
        rgba(120, 190, 255, 0.12) 0%, 
        transparent 100%);
}

/* Contact & Info Headings with Advanced Effects */
.footer-col {
    position: relative;
    padding: 30px;
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.07);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.footer-col::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 15px;
    padding: 2px;
    background: linear-gradient(45deg, 
        #78beff, 
        #96aaff, 
        #78beff);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.footer-col:hover::before {
    opacity: 1;
}

.footer-col:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.4),
        0 0 40px rgba(120, 190, 255, 0.2);
}

.footer-col h4 {
    font-size: 22px;
    margin-bottom: 30px;
    position: relative;
    font-weight: 600;
    background: linear-gradient(90deg, #78beff, #96aaff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    padding-bottom: 15px;
    transition: all 0.4s ease;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, #78beff, #96aaff);
    border-radius: 2px;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.footer-col:hover h4::after {
    width: 100px;
    background: linear-gradient(90deg, #96aaff, #78beff);
    box-shadow: 0 0 15px rgba(120, 190, 255, 0.5);
}

/* Paragraph and Link Styling with Hover Effects */
.footer-col p {
    font-size: 15px;
    color: #d1dde8;
    line-height: 1.8;
    margin-bottom: 15px;
    padding: 15px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.footer-col:hover p {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(120, 190, 255, 0.15);
    transform: translateX(5px);
}

.footer-col a {
    font-size: 15px;
    color: #78beff;
    text-decoration: none;
    line-height: 1.8;
    position: relative;
    display: inline-block;
    padding: 2px 0;
    transition: all 0.4s ease;
    font-weight: 500;
}

.footer-col a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #78beff, #96aaff);
    border-radius: 1px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.footer-col a:hover {
    color: #ffffff;
    text-shadow: 0 0 15px rgba(120, 190, 255, 0.5);
    padding-left: 10px;
}

.footer-col a:hover::before {
    width: 100%;
}

/* Social Media Icons with Advanced Effects */
.footer-social .social-links {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-top: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.09);
    border-radius: 12px;
    color: #ffffff;
    font-size: 20px;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.social-links a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.2), 
        transparent);
    transition: left 0.6s ease;
}

.social-links a:hover::before {
    left: 100%;
}

.social-links a:hover {
    transform: translateY(-10px) scale(1.1);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

/* Individual Social Icon Colors with Glow Effect */
.social-links a[aria-label="Facebook"]:hover {
    background: linear-gradient(135deg, #4267B2, #365899);
    border-color: #4267B2;
    box-shadow: 0 15px 30px rgba(66, 103, 178, 0.4);
}

.social-links a[aria-label="Twitter"]:hover {
    background: linear-gradient(135deg, #1DA1F2, #1A91DA);
    border-color: #1DA1F2;
    box-shadow: 0 15px 30px rgba(29, 161, 242, 0.4);
}

.social-links a[aria-label="Instagram"]:hover {
    background: linear-gradient(45deg, #405DE6, #5851DB, #833AB4, #C13584, #E1306C, #FD1D1D);
    border-color: #E1306C;
    box-shadow: 0 15px 30px rgba(225, 48, 108, 0.4);
}

.social-links a[aria-label="LinkedIn"]:hover {
    background: linear-gradient(135deg, #0077B5, #00669C);
    border-color: #0077B5;
    box-shadow: 0 15px 30px rgba(0, 119, 181, 0.4);
}

.social-links a[aria-label="YouTube"]:hover {
    background: linear-gradient(135deg, #FF0000, #E60000);
    border-color: #FF0000;
    box-shadow: 0 15px 30px rgba(255, 0, 0, 0.4);
}

.social-links a i {
    position: relative;
    z-index: 1;
    transition: transform 0.4s ease;
}

.social-links a:hover i {
    transform: scale(1.2) rotate(15deg);
}

/* Tooltip Effect for Social Icons */
.social-links a::after {
    content: attr(aria-label);
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 10;
    font-weight: 500;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-links a:hover::after {
    opacity: 1;
    visibility: visible;
    bottom: -35px;
}

/* Footer Bottom with Elegant Effects */
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.09);
    padding-top: 30px;
    text-align: center;
    position: relative;
}

.footer-bottom::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(120, 190, 255, 0.5), 
        rgba(150, 170, 255, 0.5), 
        transparent);
}

.footer-bottom p {
    font-size: 14px;
    color: #a8b6c6;
    padding: 15px 30px;
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.04);
    display: inline-block;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(5px);
}

.footer-bottom p::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(120, 190, 255, 0.12), 
        transparent);
    transition: left 0.6s ease;
}

.footer-bottom p:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.09);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.footer-bottom p:hover::before {
    left: 100%;
}

/* Animation for Columns on Load */
.footer-col {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.footer-brand {
    animation-delay: 0.1s;
}

.footer-contact {
    animation-delay: 0.3s;
}

.footer-social {
    animation-delay: 0.5s;
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* কমন এনিমেশন */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* স্ক্রলবার স্টাইল */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: rgba(18, 25, 40, 0.8);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #78beff, #96aaff, #b0c4ff);
    border-radius: 10px;
    border: 2px solid rgba(18, 25, 40, 0.8);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #4a8cff, #78beff, #96aaff);
}

/* ============ রেসপন্সিভ ডিজাইন ============ */

/* হেডার রেসপন্সিভ */
@media (max-width: 1200px) {
    .nav-links {
        gap: 35px;
    }
    
    .nav-right .call-btn {
        padding: 14px 28px;
        font-size: 1.05rem;
    }
}

@media (max-width: 1024px) {
    .nav-links {
        gap: 30px;
    }
    
    .nav-right .call-btn {
        padding: 13px 26px;
        font-size: 1rem;
    }
}

@media (max-width: 950px) {
    .nav-center {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(18, 25, 40, 0.98);
        backdrop-filter: blur(20px);
        padding: 25px;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        border-top: 1px solid rgba(255, 255, 255, 0.07);
        opacity: 0;
        transform: translateY(-20px);
        transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        border-radius: 0 0 24px 24px;
        border: 1px solid rgba(120, 190, 255, 0.15);
        border-top: none;
    }
    
    .nav-center.active {
        display: flex;
        opacity: 1;
        transform: translateY(0);
    }
    
    .nav-links {
        flex-direction: column;
        align-items: center;
        width: 100%;
        gap: 0;
    }
    
    .nav-item {
        width: 100%;
        text-align: center;
        padding: 18px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.07);
        font-size: 1.25rem;
        transition: all 0.3s ease;
    }
    
    .nav-item:last-child {
        border-bottom: none;
    }
    
    .nav-item:hover {
        background: rgba(120, 190, 255, 0.05);
        border-radius: 10px;
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .navbar {
        padding: 18px 0;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-left .logo {
        font-size: 1.6rem;
        padding: 10px;
    }
    
    .nav-left .logo img {
        display: none;
    }
    
    .nav-right .call-btn {
        padding: 12px 22px;
        font-size: 0.95rem;
        border-radius: 12px;
    }
    
    .mobile-menu-btn {
        width: 48px;
        height: 48px;
        font-size: 1.4rem;
    }
}

@media (max-width: 640px) {
    .nav-left .logo {
        font-size: 1.4rem;
    }
    
    .nav-right .call-btn {
        padding: 10px 18px;
        font-size: 0.9rem;
    }
    
    .mobile-menu-btn {
        width: 44px;
        height: 44px;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-left .logo {
        font-size: 1.3rem;
        padding: 8px;
    }
    
    .nav-left .logo img {
        height: 30px;
        margin-right: 8px;
    }
    
    .nav-right .call-btn {
        padding: 8px 15px;
        font-size: 0.85rem;
    }
    
    .mobile-menu-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

/* ফুটার রেসপন্সিভ */
@media (max-width: 1200px) {
    .footer-wrapper {
        gap: 40px;
    }
    
    .footer-col {
        padding: 25px;
    }
}

@media (max-width: 992px) {
    .footer-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    
    
    .footer-social .social-links {
        grid-template-columns: repeat(5, 50px);
        justify-content: center;
    }
    
    #footer {
         display: block;
        padding: 80px 0 30px;
    }
}

@media (max-width: 768px) {
    #footer {
         display: block;
        padding: 60px 20px 30px;
    }
    
    .footer-wrapper {
        gap: 35px;
    }
    
    .footer-col {
    padding: 25px;
    text-align: center;
    position: relative; /* ::after position relative করতে হবে */
}

.footer-col h4 {
    position: relative; /* ::after reference */
    display: inline-block; /* লাইন অনুযায়ী হেডিং-এর width ঠিক রাখে */
    margin-bottom: 20px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    left: 50%;       /* horizontal center */
    bottom: -5px;    /* হেডিং-এর ঠিক নিচে */
    transform: translateX(-50%);
    width: 50px;     /* লাইন দৈর্ঘ্য */
    height: 3px;
    background: linear-gradient(90deg, #ffcc00, #ff6600);
    border-radius: 2px;
    transition: all 0.5s ease;
}

.footer-col:hover h4::after {
    width: 80px; /* hover effect লম্বা লাইন */
}

    
    .footer-logo-img {
        max-width: 180px;
    }
    
    .footer-social .social-links {
        grid-template-columns: repeat(5, 45px);
        gap: 15px;
    }
    
    .social-links a {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    #footer {
        display: block;
        padding: 50px 15px 25px;
    }
    
    .footer-wrapper {
        gap: 30px;
    }
    
    .footer-col {
        padding: 20px;
    }
    
    .footer-logo-img {
        max-width: 160px;
    }
    
    .footer-tagline {
        font-size: 14px;
        padding: 15px;
    }
    
    .footer-col h4 {
        font-size: 20px;
    }
    
    .footer-col p {
        font-size: 14px;
        padding: 12px;
    }
    
    .footer-social .social-links {
        grid-template-columns: repeat(5, 40px);
        gap: 10px;
    }
    
    .social-links a {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .social-links a::after {
        font-size: 10px;
        padding: 4px 8px;
        bottom: -30px;
    }
    
    .social-links a:hover::after {
        bottom: -25px;
    }
    
    .footer-bottom p {
        font-size: 13px;
        padding: 12px 25px;
    }
}

/* পারফরমেন্স অপ্টিমাইজেশন */
.nav-left .logo,
.nav-item,
.nav-right .call-btn,
.footer-col,
.social-links a,
.footer-logo-img,
.footer-bottom p {
    will-change: transform;
    backface-visibility: hidden;
}

/* অ্যাক্সেসিবিলিটি */
.nav-item:focus,
.nav-right .call-btn:focus,
.footer-col a:focus,
.social-links a:focus {
    outline: 2px solid rgba(0, 100, 194, 0.5);
    outline-offset: 4px;
    border-radius: 4px;
}
/* -------------------------------------------------------------------------------------- */
/* ===== FOOTER ===== */
#footer {
    background: var(--dark-navy);
    padding: 80px 0 30px;
    position: relative;
    overflow: hidden;
}

.footer-content {
    margin-bottom: 50px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
}

.footer-logo {
    width: 120px;
    height: 120px;
    border-radius: 25%;
    object-fit: cover;
    border: 3px solid rgba(120, 190, 255, 0.3);
}

.brand-text h3 {
    font-size: 1.8rem;
    color: var(--white);
    margin-bottom: 5px;
    font-weight: 700;
}

.tagline {
    color: var(--light-blue);
    font-size: 1.1rem;
    font-weight: 500;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 1.2rem;
    color: var(--white);
    margin-bottom: 25px;
    font-weight: 600;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.footer-col ul {
    list-style: none;
    padding: 0;
}

.footer-col ul li {
    margin-bottom: 15px;
}

.footer-col ul li a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-col ul li a:hover {
    color: var(--light-blue);
    padding-left: 10px;
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.contact-info i {
    color: var(--light-blue);
    font-size: 1.2rem;
    margin-top: 3px;
}

.contact-info a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.contact-info a:hover {
    color: var(--light-blue);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.social-links a {
    width: 45px;
    height: 45px;
    background: rgba(120, 190, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--gradient-primary);
    transform: translateY(-5px);
}

.newsletter p {
    color: var(--text-light);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.subscribe-form {
    display: flex;
    gap: 10px;
}

.subscribe-form input {
    flex: 1;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(120, 190, 255, 0.3);
    border-radius: 8px;
    color: var(--white);
    font-size: 0.95rem;
    outline: none;
}

.subscribe-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.subscribe-form button {
    padding: 12px 25px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 8px;
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
}

.subscribe-form button:hover {
    background: var(--gradient-primary-hover);
    transform: translateY(-2px);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
}