/*
 * Project: Telegram Bot
 * Author: Molla Samser
 * Designer & Tester: Rima Khatun
 * Website: https://rskworld.in
 * Contact: hello@rskworld.in | +91 93305 39277
 * Address: Nutanhat, Mongolkote, Purba Burdwan, West Bengal, India, 713147
 * Copyright: © 2026 RSK World. All rights reserved.
 */

:root {
    --primary-color: #229ED9; /* Telegram Blue */
    --secondary-color: #1c85b5;
    --text-color: #333;
    --bg-color: #ffffff;
    --card-bg: #f8f9fa;
    --footer-bg: #1a1a1a;
    --text-light: #ffffff;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: var(--text-color);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    margin-left: 2rem;
    font-weight: 500;
    transition: color 0.3s;
}

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

.btn-primary {
    background: var(--primary-color);
    color: #fff !important;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    transition: background 0.3s;
}

.btn-primary:hover {
    background: var(--secondary-color);
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4rem 10%;
    background: radial-gradient(circle at top right, #229ED9, #5e60ce);
    color: #fff;
    min-height: 50vh;
}

.hero-content {
    max-width: 50%;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-image {
    width: 40%;
    text-align: center;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

.cta-buttons .btn {
    text-decoration: none;
    padding: 0.8rem 2rem;
    border-radius: 5px;
    font-weight: bold;
    margin-right: 1rem;
    display: inline-block;
}

.cta-buttons .btn-primary {
    background: #fff;
    color: var(--primary-color) !important;
}

.cta-buttons .btn-secondary {
    background: transparent;
    border: 2px solid #fff;
    color: #fff;
}

/* Features */
.features {
    padding: 4rem 10%;
    background: #fff;
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    border-radius: 15px;
    background: var(--card-bg);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #eee;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Tech Stack */
.tech-stack {
    text-align: center;
    padding: 3rem 10%;
    background: #f9f9f9;
}

.tech-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #e1e1e1;
    border-radius: 20px;
    margin: 0.5rem;
    font-weight: 600;
    color: #555;
}

/* Footer */
footer {
    background: var(--footer-bg);
    color: var(--text-light);
    padding: 3rem 10% 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.social-links a {
    color: #fff;
    font-size: 1.5rem;
    margin-right: 1rem;
    transition: color 0.3s;
}

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

.copyright {
    text-align: center;
    border-top: 1px solid #333;
    padding-top: 2rem;
    font-size: 0.9rem;
    color: #888;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 2rem;
    }
    .hero-content {
        max-width: 100%;
    }
    .navbar {
        flex-direction: column;
    }
    .nav-links {
        margin-top: 1rem;
    }
    .nav-links a {
        margin: 0 0.5rem;
    }
}