/* Global Styles & Variables */
:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-color: #e6edf3;
    --text-muted: #8b949e;
    --primary-color: #2f81f7;
    --primary-hover: #58a6ff;
    --border-color: #30363d;
    --accent-color: #bc8cff;
    --font-family: 'Vazirmatn', sans-serif;
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@100..900&display=swap');

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    direction: rtl;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 10px 24px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(47, 129, 247, 0.4);
}

.section-title {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--text-color);
}

/* Header */
header {
    background-color: rgba(22, 27, 34, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
}

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

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 100px 0;
    background: radial-gradient(circle at 50% 50%, rgba(47, 129, 247, 0.1), transparent 70%);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.downloader-box {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.downloader-box input {
    flex: 1;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
}

.downloader-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Features Grid */
.features {
    padding: 60px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Content Sections */
.content-section {
    padding: 40px 0;
}

.content-block {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.content-block h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.content-block p {
    margin-bottom: 1rem;
    color: var(--text-color);
    text-align: justify;
}

/* Footer */
footer {
    background-color: var(--card-bg);
    padding: 40px 0 20px;
    border-top: 1px solid var(--border-color);
    margin-top: 60px;
    text-align: center;
}

.footer-links {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .nav-links {
        display: none; /* Mobile menu implementation needed via JS */
        position: absolute;
        top: 100%;
        width: 100%;
        left: 0;
        background-color: var(--card-bg);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .downloader-box {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}