:root {
    --blue-50: #f8fdff;
    --blue-100: #eef9ff;
    --blue-200: #dff4ff;
    --blue-400: #0ea5ff;
    --blue-500: #0284c7;
    --blue-600: #0369a1;
    --muted: rgba(2, 132, 199, 0.1);
    --glass-border: rgba(255, 255, 255, 0.6);
}

/* global font */
body {
    font-family: "Noto Sans Bengali", sans-serif;
    /* soft white -> blue gradient */
    background: linear-gradient(
        180deg,
        var(--blue-50) 0%,
        var(--blue-100) 40%,
        #e6f7ff 60%,
        #dff3ff 100%
    );
    color: #042b3b;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Particle styles (pale blue bubbles) */
.particle {
    position: absolute;
    background: rgba(14, 165, 255, 0.12);
    border: 1px solid rgba(14, 165, 255, 0.18);
    box-shadow: 0 6px 20px rgba(2, 132, 199, 0.06);
    border-radius: 50%;
    animation-name: float;
    animation-iteration-count: infinite;
    animation-timing-function: ease-in;
    mix-blend-mode: screen;
}

@keyframes float {
    0% {
        transform: translateY(0) translateX(0) scale(1);
        opacity: 0.9;
    }
    50% {
        opacity: 0.5;
        transform: translateY(-40vh) translateX(10px) scale(0.95);
    }
    100% {
        transform: translateY(-120vh) translateX(30px) scale(0.85);
        opacity: 0;
    }
}

/* Slide-up animation */
.slide-up {
    transform: translateY(50px);
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.2, 0.9, 0.2, 1);
}

.slide-up.active {
    transform: translateY(0);
    opacity: 1;
}

/* Reveal cards */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s cubic-bezier(0.2, 0.9, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Glass effect (lighter for white-blue BG) */
.glass {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(2, 132, 199, 0.08);
    box-shadow: 0 8px 30px rgba(2, 132, 199, 0.06);
}

/* Hero text glow (soft blue) */
.text-glow {
    text-shadow: 0 0 6px rgba(14, 165, 255, 0.35),
        0 0 18px rgba(2, 132, 199, 0.18);
}

/* Button gradient (blue) */
.btn-primary {
    background: linear-gradient(135deg, var(--blue-400), var(--blue-500));
    color: white;
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(2, 132, 199, 0.12);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(2, 132, 199, 0.18);
}

.btn-primary:active {
    transform: translateY(-1px) scale(0.997);
}

/* Modern Dropdown Styles (blue gradient) */
.dropdown-container {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    background: linear-gradient(
        135deg,
        rgba(14, 165, 255, 0.92) 0%,
        rgba(3, 104, 161, 0.94) 100%
    );
    backdrop-filter: blur(10px);
    border-bottom: 3px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 10px 40px rgba(3, 104, 161, 0.12);
    color: white;
    padding: 0.6rem 1rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all 0.36s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1000;
    border-radius: 10px;
}

.dropdown-container.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    position: relative;
    overflow: hidden;
    transition: all 0.28s ease;
    padding: 0.5rem 0.6rem;
    border-radius: 8px;
}

.dropdown-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.12),
        transparent
    );
    transition: left 0.45s ease;
}

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

.dropdown-item:hover {
    transform: translateX(8px);
}

/* dropdown icon rotation */
.dropdown-icon {
    display: inline-block;
    transition: transform 0.3s ease;
}

.dropdown-btn.active .dropdown-icon {
    transform: rotate(180deg);
}

/* Mobile Dropdown */
.mobile-dropdown {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in-out;
}
.mobile-dropdown.active {
    max-height: 500px;
}

/* Animated underline for nav links (blue) */
.nav-link {
    position: relative;
    color: #04384a;
}
.nav-link::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--blue-400);
    transition: width 0.28s ease;
}
.nav-link:hover::after {
    width: 100%;
}

/* Product hover */
.product-card {
    transition: transform 0.28s ease, box-shadow 0.28s ease;
    border-radius: 12px;
    background: linear-gradient(180deg, white, #f4fbff);
}
.product-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 18px 40px rgba(2, 132, 199, 0.06);
}

/* Shine Hover Effect (subtle, blue tint) */
.card-shine::before {
    content: "";
    position: absolute;
    top: -120%;
    left: -120%;
    width: 250%;
    height: 250%;
    background: rgba(255, 255, 255, 0.18);
    transform: rotate(30deg);
    transition: 0.7s;
}
.card-shine:hover::before {
    top: 100%;
    left: 100%;
}

/* Ripple effect (blue) */
@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 0.9;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(14, 165, 255, 0.36);
    width: 20px;
    height: 20px;
    animation: ripple 0.6s ease-out;
    pointer-events: none;
}

/* gallery / modal / slide animations kept (adjusted shadows) */
.gallery-item {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}
@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}
.modal-content {
    animation: modalIn 0.36s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* image hover tint */
.image-hover::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(14, 165, 255, 0.12) 0%,
        rgba(3, 104, 161, 0.12) 100%
    );
    opacity: 0;
    transition: opacity 0.28s;
}
.image-hover:hover::before {
    opacity: 1;
}

/* shimmer (neutral) */
.shimmer {
    background: linear-gradient(90deg, #f0f7fb 25%, #e6f3fb 50%, #f0f7fb 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}
@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* small layout helpers for demo */
.container {
    max-width: 1100px;
    margin: 4rem auto;
    padding: 1rem;
}
.hero {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    justify-content: space-between;
}
.card {
    padding: 1.2rem;
    border-radius: 14px;
}
.particles-wrap {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}
.content {
    position: relative;
    z-index: 5;
}