/* --- تنظیمات پایه و متغیرها --- */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-tertiary: #ec4899;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --nav-height: 80px;
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
}

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

body {
    font-family: 'Vazirmatn', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
    overflow-x: hidden;
    line-height: 1.6;
    padding-top: var(--nav-height); /* جلوگیری از رفتن محتوا زیر نوبار */
}

/* --- Navbar --- */
.navbar {
    position: fixed; top: 0; right: 0; width: 100%;
    background: rgba(var(--bg-card), 0.8); /* شیشه‌ای */
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    height: var(--nav-height);
}

.nav-container {
    max-width: 1400px; margin: 0 auto; padding: 0 2rem;
    height: 100%; display: flex; justify-content: space-between; align-items: center;
}

.logo {
    display: flex; align-items: center; gap: 0.75rem;
    font-size: 1.5rem; font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.logo i { font-size: 1.8rem; animation: rotate 5s linear infinite; }

@keyframes rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a {
    text-decoration: none; color: var(--text-secondary); font-weight: 500;
    transition: var(--transition); position: relative; padding: 5px 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-links a::after {
    content: ''; position: absolute; bottom: 0; right: 0; width: 0; height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: var(--transition);
}
.nav-links a:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 1rem; }

/* دکمه تم */
.theme-toggle {
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    width: 40px; height: 40px; border-radius: 50%; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-primary); transition: var(--transition);
}
.theme-toggle:hover { background: var(--accent-primary); color: white; border-color: var(--accent-primary); }

/* دکمه‌ها */
.btn {
    padding: 0.75rem 1.5rem; border-radius: 12px; font-weight: 600;
    text-decoration: none; border: none; cursor: pointer;
    font-family: inherit; font-size: 0.95rem; transition: var(--transition);
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white; box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4); }
.btn-outline {
    background: transparent; border: 2px solid var(--accent-primary); color: var(--accent-primary);
}
.btn-outline:hover { background: var(--accent-primary); color: white; }
.btn-white { background: white; color: var(--accent-primary); }
.btn-white:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(0,0,0,0.2); }

/* منوی همبرگری */
.hamburger { display: none; flex-direction: column; gap: 6px; cursor: pointer; z-index: 1002; }
.hamburger span {
    width: 30px; height: 3px; background: var(--text-primary);
    border-radius: 3px; transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
    min-height: calc(100vh - var(--nav-height)); 
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden; padding: 4rem 2rem;
}
.hero-bg {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15), transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15), transparent 50%);
    z-index: 0;
}
.hero-content {
    max-width: 1400px; width: 100%; display: grid; grid-template-columns: 1fr 1fr;
    gap: 4rem; align-items: center; position: relative; z-index: 1;
}
.hero-text { animation: fadeInUp 0.8s ease-out; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

.badge {
    display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1rem;
    background: var(--bg-card); border-radius: 50px; font-size: 0.875rem; font-weight: 600;
    margin-bottom: 1.5rem; border: 1px solid var(--border-color); color: var(--accent-primary);
}
.hero-title {
    font-size: 3.5rem; font-weight: 900; line-height: 1.2; margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-desc { font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 2rem; max-width: 600px; }
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }

.floating-card {
    background: var(--bg-card); border-radius: 20px; padding: 2rem;
    box-shadow: var(--shadow-lg); border: 1px solid var(--border-color);
    position: relative; backdrop-filter: blur(10px);
}
/* افکت نئون دور کارت */
.floating-card::before {
    content: ''; position: absolute; inset: -2px; z-index: -1;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));
    border-radius: 22px; opacity: 0; transition: var(--transition);
}
.floating-card:hover::before { opacity: 1; }

.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin-top: 1rem; }
.stat-number {
    font-size: 2rem; font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-label { color: var(--text-secondary); font-size: 0.85rem; margin-top: 0.25rem; }

/* --- Sections General --- */
.section { padding: 6rem 2rem; max-width: 1400px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 4rem; }
.section-title { font-size: 2.5rem; font-weight: 900; margin-bottom: 1rem; }
.section-subtitle { font-size: 1.1rem; color: var(--text-secondary); }

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.feature-card {
    background: var(--bg-card); border-radius: 20px; padding: 2.5rem;
    border: 1px solid var(--border-color); transition: var(--transition);
}
.feature-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg); border-color: var(--accent-primary); }
.feature-icon {
    width: 60px; height: 60px; border-radius: 15px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex; align-items: center; justify-content: center;
    font-size: 1.75rem; color: white; margin-bottom: 1.5rem;
}
.feature-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; }
.feature-desc { color: var(--text-secondary); line-height: 1.7; }

/* Blog */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; }
.blog-card {
    background: var(--bg-card); border-radius: 20px; overflow: hidden;
    border: 1px solid var(--border-color); transition: var(--transition); cursor: pointer;
}
.blog-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.blog-image {
    height: 220px; background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));
    display: flex; align-items: center; justify-content: center;
}
.blog-image i { font-size: 4rem; color: rgba(255,255,255,0.8); }
.blog-content { padding: 1.5rem; }
.blog-date { font-size: 0.8rem; color: var(--text-secondary); display: block; margin-bottom: 0.5rem; }
.blog-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.75rem; line-height: 1.4; }
.blog-excerpt { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 1.5rem; }
.read-more {
    color: var(--accent-primary); font-weight: 600; text-decoration: none;
    display: inline-flex; align-items: center; gap: 5px; font-size: 0.9rem;
}
.read-more:hover { gap: 8px; }

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.pricing-card {
    background: var(--bg-card); border-radius: 24px; padding: 2.5rem;
    border: 1px solid var(--border-color); transition: var(--transition);
    position: relative; display: flex; flex-direction: column;
}
.pricing-card.featured {
    border: 2px solid var(--accent-primary); transform: scale(1.05);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.15); z-index: 2;
}
.pricing-badge {
    position: absolute; top: -12px; right: 50%; transform: translateX(50%);
    background: var(--accent-primary); color: white; padding: 6px 16px;
    border-radius: 50px; font-size: 0.8rem; font-weight: 700; box-shadow: var(--shadow-md);
}
.plan-name { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.5rem; text-align: center; }
.plan-price {
    font-size: 2.5rem; font-weight: 900; margin-bottom: 0.5rem; text-align: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.plan-period { color: var(--text-secondary); text-align: center; margin-bottom: 2rem; font-size: 0.9rem; }
.plan-features { list-style: none; margin-bottom: 2rem; flex-grow: 1; }
.plan-features li {
    padding: 0.6rem 0; color: var(--text-secondary); display: flex; align-items: center; gap: 10px;
}
.plan-features li::before {
    content: '✓'; display: flex; align-items: center; justify-content: center;
    width: 20px; height: 20px; background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary); border-radius: 50%; font-size: 0.75rem; font-weight: bold;
}

/* CTA */
.cta-section {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 30px; padding: 4rem 2rem; text-align: center; color: white;
    position: relative; overflow: hidden; margin-top: 4rem;
}
.cta-content { position: relative; z-index: 1; }
.cta-title { font-size: 2.5rem; font-weight: 900; margin-bottom: 1rem; }
.cta-desc { font-size: 1.25rem; margin-bottom: 2rem; opacity: 0.9; }

/* Footer */
.footer {
    background: var(--bg-secondary); padding: 4rem 2rem 2rem; border-top: 1px solid var(--border-color);
}
.footer-content {
    max-width: 1400px; margin: 0 auto; display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 3rem;
}
.footer-section h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 1.5rem; color: var(--text-primary); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 0.75rem; }
.footer-links a { color: var(--text-secondary); text-decoration: none; transition: var(--transition); }
.footer-links a:hover { color: var(--accent-primary); }
.footer-bottom {
    text-align: center; margin-top: 4rem; padding-top: 2rem;
    border-top: 1px solid var(--border-color); color: var(--text-secondary); font-size: 0.9rem;
}
.social-links { display: flex; gap: 1rem; margin-top: 1.5rem; }
.social-links a {
    width: 40px; height: 40px; border-radius: 50%; background: var(--bg-card);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-primary); transition: var(--transition); border: 1px solid var(--border-color);
}
.social-links a:hover { background: var(--accent-primary); color: white; transform: translateY(-3px); border-color: var(--accent-primary); }

/* Modals */
.modal {
    display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6); backdrop-filter: blur(8px); z-index: 2000;
    align-items: center; justify-content: center; padding: 1rem; opacity: 0;
    transition: opacity 0.3s ease;
}
.modal.active { display: flex; opacity: 1; }
.modal-content {
    background: var(--bg-card); border-radius: 24px; padding: 2.5rem;
    width: 100%; max-width: 480px; border: 1px solid var(--border-color);
    position: relative; transform: translateY(30px); transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: var(--shadow-lg);
}
.modal.active .modal-content { transform: translateY(0); }
.close-modal {
    position: absolute; top: 1.5rem; left: 1.5rem; font-size: 1.5rem;
    color: var(--text-secondary); cursor: pointer; transition: var(--transition);
}
.close-modal:hover { color: var(--text-primary); transform: rotate(90deg); }
.modal-header { text-align: center; margin-bottom: 2rem; }
.modal-title { font-size: 1.75rem; font-weight: 800; margin-bottom: 0.5rem; }
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; font-size: 0.9rem; }
.form-group input {
    width: 100%; padding: 0.9rem 1rem; border-radius: 12px; border: 1px solid var(--border-color);
    background: var(--bg-secondary); color: var(--text-primary); font-family: inherit; font-size: 1rem;
    transition: var(--transition);
}
.form-group input:focus { border-color: var(--accent-primary); outline: none; box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1); }

/* Alerts */
.alert-box {
    position: fixed; top: 100px; left: 50%; transform: translateX(-50%);
    width: 90%; max-width: 500px; padding: 1rem; border-radius: 12px;
    z-index: 2001; text-align: center; font-weight: 600; box-shadow: var(--shadow-lg);
    animation: slideDown 0.5s ease;
}
@keyframes slideDown { from { top: -50px; opacity: 0; } to { top: 100px; opacity: 1; } }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #22c55e; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #ef4444; }

/* --- Responsive (Mobile Fixes) --- */
@media (max-width: 1024px) {
    .hero-content { grid-template-columns: 1fr; text-align: center; gap: 3rem; }
    .hero-buttons { justify-content: center; }
    .hero-title { font-size: 3rem; }
    .floating-card { margin: 0 auto; max-width: 500px; }
    .footer-content { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed; top: var(--nav-height); right: -100%;
        width: 80%; max-width: 300px; height: calc(100vh - var(--nav-height));
        background: var(--bg-card); flex-direction: column; padding: 2rem;
        border-left: 1px solid var(--border-color); box-shadow: -10px 0 30px rgba(0,0,0,0.1);
        transition: 0.3s ease-in-out; gap: 1.5rem; overflow-y: auto;
    }
    .nav-links.active { right: 0; }
    .nav-actions { display: none; } /* مخفی کردن دکمه‌های هدر در موبایل */
    .mobile-nav-actions { display: flex; flex-direction: column; gap: 1rem; width: 100%; margin-top: 1rem; } /* دکمه‌های موبایلی داخل منو */
    
    .hamburger { display: flex; }
    .hero { padding: 4rem 1.5rem; }
    .hero-title { font-size: 2.2rem; }
    .section { padding: 4rem 1.5rem; }
    .pricing-card.featured { transform: scale(1); }
    .footer-content { grid-template-columns: 1fr; text-align: center; gap: 2rem; }
    .social-links { justify-content: center; }
}