/* General Setup */
:root {
    --primary-color: #0066ff; /* আপনার অ্যাপের নীল রং */
    --secondary-color: #0044aa;
    --text-dark: #333;
    --text-light: #666;
    --bg-light: #f9f9f9;
    --white: #fff;
    --font-main: 'Hind Siliguri', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-dark);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo span {
    color: var(--text-dark);
}

.navbar ul {
    display: flex;
    gap: 30px;
}

.navbar a {
    font-weight: 500;
    color: var(--text-dark);
    transition: 0.3s;
}

.navbar a:hover {
    color: var(--primary-color);
}

.btn-download {
    background: var(--primary-color);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 600;
}

.menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #e0efff 0%, #ffffff 100%);
    padding: 60px 0;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-text h1 {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-text span {
    color: var(--primary-color);
}

.hero-text p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 30px;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    padding: 12px 30px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
    transition: 0.3s;
}

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.hero-image img {
    max-width: 300px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

/* Section Common */
section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 32px;
    color: var(--primary-color);
}

.line {
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    margin: 10px auto;
}

/* About Section */
.about {
    background: var(--white);
    text-align: center;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.heart-touching {
    font-size: 22px;
    font-style: italic;
    color: var(--primary-color);
    margin-bottom: 20px;
}

/* Features */
.features {
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.icon {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

/* CTA */
.cta {
    background: var(--primary-color);
    color: var(--white);
    text-align: center;
}

.cta h2 {
    margin-bottom: 30px;
}

.btn-white {
    background: var(--white);
    color: var(--primary-color);
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 700;
}

/* Footer */
footer {
    background: #222;
    color: #ddd;
    padding: 50px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid #444;
    padding-top: 20px;
    font-size: 14px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .navbar {
        position: absolute;
        top: 70px;
        right: -100%;
        background: var(--white);
        width: 100%;
        text-align: center;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        transition: 0.3s;
    }

    .navbar.active {
        right: 0;
    }

    .navbar ul {
        flex-direction: column;
    }

    .menu-toggle {
        display: block;
    }

    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .btn-download {
        display: none; /* মোবাইলে হেডার বাটন লুকানো থাকবে */
    }
}