/* ===== ROOT VARIABLES ===== */
:root {
    --bg-primary: #07070d;
    --bg-secondary: #0d0d1a;
    --violet-dark: #1a0836;
    --violet-main: #7c3aed;
    --violet-light: #a78bfa;
    --violet-glow: #c4b5fd;
    --text-primary: #eeeef5;
    --text-secondary: #8888a0;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(167, 139, 250, 0.12);
    --gradient-main: linear-gradient(135deg, #07070d 0%, #1a0836 50%, #07070d 100%);
    --gradient-violet: linear-gradient(135deg, #6d28d9, #a78bfa);
    /* --font-main: 'DM Sans', sans-serif; */
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
    --transition: all 0.3s ease;
    --shadow-violet: 0 0 30px rgba(124, 58, 237, 0.25);
    --font-bangla: 'Hind Siliguri', sans-serif;
}

/* ===== RESET ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: #07070d;
    background-image:
        linear-gradient(rgba(124, 58, 237, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 58, 237, 0.045) 1px, transparent 1px);
    background-size: 55px 55px;
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse 70% 50% at 50% 0%,
        rgba(20, 8, 45, 0.75) 0%, transparent 75%);
    pointer-events: none;
    z-index: 0;
}

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.2rem 0;
    background: transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 0.8rem 0;
    background: rgba(7, 7, 13, 0.75);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(124, 58, 237, 0.12);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 1px;
}

.nav-logo-img {
    height: 38px;
    width: auto;
    object-fit: contain;
}

.logo-bracket {
    color: var(--violet-light);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.3rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0.9rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active-link {
    color: var(--violet-light);
    background: rgba(124, 58, 237, 0.1);
}

/* ===== HAMBURGER ===== */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== MAIN ===== */
main {
    position: relative;
    z-index: 1;
    padding-top: 50px;
    flex: 1;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font-main);
}

.btn-primary {
    background: var(--gradient-violet);
    color: white;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.6);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--violet-light);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(124, 58, 237, 0.1);
    border-color: var(--violet-main);
    transform: translateY(-3px);
    color: var(--violet-light);
}

.btn-sm {
    padding: 0.5rem 1.1rem;
    font-size: 0.85rem;
}

/* ===== FILTER BUTTONS (global) ===== */
.filter-btns {
    display: flex;
    justify-content: center;
    gap: 0.6rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.4rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    font-family: var(--font-main);
    cursor: pointer;
}

.filter-btn:hover {
    background: rgba(124, 58, 237, 0.15);
    border-color: var(--violet-main);
    color: var(--violet-light);
}

.filter-btn.active {
    background: var(--gradient-violet);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
}

/* ===== GLOBAL SECTION HEADER ===== */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3.5rem;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--violet-light);
    margin-bottom: 0.9rem;
}

.section-tag::before {
    content: '';
    width: 20px;
    height: 1px;
    background: var(--violet-light);
    display: inline-block;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    max-width: 520px;
    margin: 0 auto;
}

/* ===== FOOTER ===== */
.footer {
    position: relative;
    z-index: 1;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: 3rem 0 1.5rem;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.8rem;
    line-height: 1.6;
}

.footer-links h4,
.footer-social h4 {
    color: var(--violet-light);
    font-family: var(--font-heading);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-links ul a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links ul a:hover {
    color: var(--violet-light);
    padding-left: 5px;
}

.social-icons {
    display: flex;
    gap: 0.8rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1rem;
    transition: var(--transition);
}

.social-icon:hover {
    background: rgba(124, 58, 237, 0.2);
    border-color: var(--violet-main);
    color: var(--violet-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-violet);
}

.footer-bottom {
    border-top: 1px solid var(--glass-border);
    padding-top: 1.5rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.heart {
    color: var(--violet-light);
}

/* ===== BANGLA FONT ===== */
:lang(bn),
[lang="bn"] {
    font-family: var(--font-bangla);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(20px);
    padding: 1.2rem;
    border-bottom: 1px solid var(--glass-border);
    gap: 1rem;
    }

    .nav-links.open {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}