* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #818CF8;
    --secondary-color: #06B6D4;
    --accent-color: #F59E0B;
    --success-color: #10B981;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --text-dark: #1F2937;
    --text-gray: #6B7280;
    --bg-light: #F9FAFB;
    --white: #FFFFFF;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
}
body {
    font-family: 'Vazirmatn', 'Tahoma', 'Arial', sans-serif;
    background: var(--white);
    color: var(--text-dark);
    line-height: 1.8;
    overflow-x: hidden;
}
/* Header */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}
nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}
.logo {
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}
.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}
.nav-links a:hover {
    color: var(--primary-color);
}
.sandbad-link {
    color: #473dd3 !important;
}
.cta-button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    padding: 0.75rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    border: none;
    cursor: pointer;
    display: inline-block;
}
.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}
.cta-button-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    margin-right: 1rem;
}
.cta-button-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
}
/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 8rem 2rem 6rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-top: 70px;
}
.hero::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: float 20s linear infinite;
    opacity: 0.3;
}
@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}
.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.hero h1 {
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 1.5rem;
    font-weight: 900;
    line-height: 1.2;
    animation: fadeInUp 0.8s ease;
}
.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 3rem;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}
.hero-buttons {
    animation: fadeInUp 0.8s ease 0.4s both;
}
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}
/* Section */
section {
    padding: 5rem 0;
}
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 1rem;
}
.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-gray);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}
/* Intro Section */
.intro {
    background: var(--bg-light);
}
.intro-content {
    background: var(--white);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    font-size: 1.1rem;
    line-height: 2;
    color: var(--text-gray);
    text-align: justify;
}
/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}
.feature-card:hover::before {
    transform: scaleX(1);
}
.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}
.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}
.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}
.feature-card .feature-subtitle {
    color: var(--primary-color);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    font-weight: 600;
}
.feature-card ul {
    list-style: none;
    color: var(--text-gray);
}
.feature-card ul li {
    padding: 0.5rem 0;
    padding-right: 1.5rem;
    position: relative;
}
.feature-card ul li::before {
    content: '✓';
    position: absolute;
    right: 0;
    color: var(--success-color);
    font-weight: bold;
}
/* AI Section */
.ai-section {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    position: relative;
    overflow: hidden;
}
.ai-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 2px, transparent 2px);
    background-size: 40px 40px;
    animation: rotate 60s linear infinite;
}
@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.ai-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: 25px;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}
.ai-content h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-align: center;
}
.ai-content p {
    color: var(--text-gray);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    text-align: center;
}
.ai-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}
.ai-feature-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    border-right: 4px solid var(--success-color);
    transition: all 0.3s ease;
}
.ai-feature-item:hover {
    transform: translateX(-5px);
    box-shadow: var(--shadow-md);
}
.ai-feature-item i {
    color: var(--success-color);
    margin-left: 0.5rem;
}
/* Why Section */
.why-section {
    background: var(--bg-light);
}
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.why-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}
.why-card:hover {
    border-color: var(--accent-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}
.why-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}
.why-card h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-weight: 700;
}
.why-card p {
    color: var(--text-gray);
    line-height: 1.8;
}
/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    text-align: center;
    padding: 5rem 2rem;
    position: relative;
}
.cta-section h2 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
}
.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: 2rem;
}
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}
.cta-button-light {
    background: var(--white);
    color: var(--primary-color);
}
.cta-button-light:hover {
    background: var(--bg-light);
}
/* Android Download Section */
.android-download-section {
    background: var(--bg-light);
    padding: 5rem 2rem;
}
.android-content-wrapper {
    max-width: 800px;
    margin: 0 auto;
}
.android-main-card {
    background: var(--white);
    padding: 3.5rem 3rem;
    border-radius: 25px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}
.android-main-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #3DDC84, #2BB673);
    transform: scaleX(1);
}
.android-main-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(61, 220, 132, 0.2);
    border-color: rgba(61, 220, 132, 0.3);
}
.android-icon-wrapper {
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem;
    background: linear-gradient(135deg, #3DDC84 0%, #2BB673 100%);
    border-radius: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(61, 220, 132, 0.3);
    transition: all 0.3s ease;
    position: relative;
}
.android-main-card:hover .android-icon-wrapper {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 15px 40px rgba(61, 220, 132, 0.4);
}
.android-icon-wrapper i {
    font-size: 3.5rem;
    color: var(--white);
}
.android-main-card h3 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 1rem;
}
.android-description {
    font-size: 1.05rem;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.android-features-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2.5rem;
    text-align: right;
}
.android-feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-light);
    border-radius: 12px;
    transition: all 0.3s ease;
}
.android-feature-item:hover {
    background: rgba(61, 220, 132, 0.1);
    transform: translateX(-5px);
}
.android-feature-item i {
    color: #3DDC84;
    font-size: 1.2rem;
    flex-shrink: 0;
}
.android-feature-item span {
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
}
.android-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(135deg, #3DDC84 0%, #2BB673 100%);
    color: var(--white);
    padding: 1.25rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 10px 30px rgba(61, 220, 132, 0.4);
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
    position: relative;
    overflow: hidden;
}
.android-download-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}
.android-download-btn:hover::before {
    width: 300px;
    height: 300px;
}
.android-download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(61, 220, 132, 0.5);
}
.android-download-btn:active {
    transform: translateY(-1px);
}
.android-download-btn i {
    font-size: 1.3rem;
    position: relative;
    z-index: 1;
}
.android-download-btn span {
    position: relative;
    z-index: 1;
}
.android-download-btn small {
    background: rgba(255, 255, 255, 0.25);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}
.android-version-info {
    color: var(--text-gray);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}
.android-version-info i {
    color: var(--primary-color);
}
/* Footer */
footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 3rem 2rem 1rem;
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}
.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--primary-light);
}
.footer-section ul {
    list-style: none;
}
.footer-section ul li {
    padding: 0.5rem 0;
}
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}
.footer-section a:hover {
    color: var(--white);
}
.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}
.social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}
.social-icons a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}
.social-icons a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}
/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}
/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .cta-section h2 {
        font-size: 1.8rem;
    }
    .features-grid,
    .why-grid {
        grid-template-columns: 1fr;
    }
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    .cta-button-secondary {
        margin-right: 0;
        margin-top: 1rem;
    }
    .intro-content {
        padding: 2rem;
        text-align: right;
    }
    .android-main-card {
        padding: 2.5rem 2rem;
    }
    .android-icon-wrapper {
        width: 80px;
        height: 80px;
    }
    .android-icon-wrapper i {
        font-size: 2.5rem;
    }
    .android-main-card h3 {
        font-size: 1.5rem;
    }
    .android-features-list {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    .android-download-btn {
        padding: 1rem 2rem;
        font-size: 1rem;
        flex-direction: column;
        gap: 0.5rem;
    }
}
/* Scroll Animation */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}
.scroll-indicator i {
    color: var(--white);
    font-size: 2rem;
}

/* Language Selector Styles */
.language-selector-wrapper {
    position: relative;
}

.language-selector-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--white);
    border: 2px solid var(--primary-light);
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.9rem;
}

.language-selector-button:hover {
    background: var(--primary-light);
    color: var(--white);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.language-selector-button i {
    font-size: 1.2rem;
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    z-index: 1000;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.language-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-dark);
    text-decoration: none;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.language-option:last-child {
    border-bottom: none;
}

.language-option:hover {
    background: var(--primary-color);
    color: var(--white);
}

.language-option:hover .language-flag {
    border-color: rgba(255, 255, 255, 1);
}

.language-option.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    font-weight: 700;
}

.language-option.active .language-flag {
    border-color: rgba(255, 255, 255, 1);
    box-shadow: 0 3px 8px rgba(0,0,0,0.25);
}

.language-flag {
    width: 28px;
    height: 28px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    display: inline-block;
    border: 2px solid rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
}

.language-name {
    flex: 1;
    font-weight: 500;
}

.language-option.active .language-name {
    font-weight: 700;
}