:root {
    --primary-green: #25D366;
    --dark: #111827;
    --light: #f8fafc;
    --gray: #64748b;
}


body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5 {
    font-family: 'Roboto', sans-serif;
    font-weight: 600;
}

.navbar {
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
}


.hero-section {
    background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://picsum.photos/id/1015/2000/1200') center/cover;
    opacity: 0.15;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-image img {
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-image:hover img {
    transform: scale(1.03);
}


.feature-card {
    background: white;
    border: 1px solid #e5e7eb;
    transition: all 0.4s cubic-bezier(0.4, 0.0, 0.2, 1);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    border-color: var(--primary-green);
}

.icon-wrapper {
    width: 70px;
    height: 70px;
    background: rgba(37, 211, 102, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.feature-card:hover .icon-wrapper {
    background: rgba(37, 211, 102, 0.15);
    transform: scale(1.1);
}


.step {
    display: flex;
    gap: 20px;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary-green);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 700;
    flex-shrink: 0;
}


.download-btn {
    padding: 14px 28px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px);
}


@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

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

.animate-on-scroll {
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}


#backToTop {
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
}


@media (max-width: 768px) {
    .hero-section .display-3 {
        font-size: 2.5rem;
    }

    .feature-card {
        margin-bottom: 1.5rem;
    }
}