/* Reset and Base Styles */
@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;700;900&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Vazirmatn', Tahoma, sans-serif;
    scroll-behavior: smooth;
}

:root {
    --primary-color: #24A1DE; /* Telegram Blue */
    --primary-dark: #1d82b3;
    --secondary-color: #2ec4b6;
    --dark-color: #1e293b;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --text-color: #475569;
    --border-color: #e2e8f0;
}

body {
    background-color: var(--light-bg);
    color: var(--text-color);
    line-height: 1.8;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Header & Navbar */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--primary-color);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

nav ul a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 700;
    transition: color 0.3s;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s;
    cursor: pointer;
}

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

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

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

.btn-secondary:hover {
    background-color: #25a195;
    transform: translateY(-2px);
}

.btn-large {
    padding: 15px 30px;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    overflow: hidden;
}

.hero-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--dark-color);
    margin-bottom: 20px;
    line-height: 1.4;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}

/* Robot & Chat Bubble Animation */
.robot-animation {
    font-size: 10rem;
    color: var(--primary-color);
    position: relative;
    animation: float 4s ease-in-out infinite;
}

.chat-bubble {
    position: absolute;
    background: var(--white);
    padding: 10px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    white-space: nowrap;
}

.chat-bubble.left {
    top: -20px;
    left: -120px;
    border-bottom-left-radius: 2px;
    color: var(--primary-color);
    direction: ltr;
}

.chat-bubble.right {
    bottom: 20px;
    right: -100px;
    border-bottom-right-radius: 2px;
    color: var(--secondary-color);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--white);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 900;
    color: var(--dark-color);
    margin-bottom: 50px;
}

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

.feature-card {
    background-color: var(--light-bg);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 15px;
}

/* How It Works Section */
.how-it-works {
    padding: 80px 0;
}

.steps-wrapper {
    display: flex;
    justify-content: space-around;
    gap: 30px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 250px;
    text-align: center;
    position: relative;
    padding: 20px;
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    margin: 0 auto 20px;
}

.step h3 {
    color: var(--dark-color);
    margin-bottom: 10px;
}

/* FAQ Section */
.faq {
    padding: 80px 0;
    background-color: var(--white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.faq-question h3 {
    font-size: 1.1rem;
    color: var(--dark-color);
}

.faq-question i {
    transition: transform 0.3s;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-answer p {
    padding-top: 15px;
    color: var(--text-color);
}

.faq-item.active .faq-answer {
    max-height: 200px; /* تخمین حداکثر ارتفاع */
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
    color: var(--primary-color);
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 40px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.social-links a {
    color: var(--white);
    font-size: 1.8rem;
    transition: color 0.3s;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }
    
    nav ul {
        margin: 10px 0;
    }

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

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .robot-animation {
        font-size: 7rem;
    }

    .chat-bubble.left {
        left: -80px;
    }

    .chat-bubble.right {
        right: -60px;
    }

    .footer-content {
        flex-direction: column;
    }
}