/* About HandTalk Styles */
.about-container {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.1;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-title .highlight {
    color: #ffd700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.3rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.hero-icon {
    font-size: 8rem;
    opacity: 0.3;
    animation: float 3s ease-in-out infinite;
}

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

/* Content Section */
.content-section {
    padding: 80px 20px;
    background: #f8f9fa;
}

.content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
}

/* Cards Styling */
.intro-card, .dev-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 60px;
    border: 1px solid #e1e8ed;
}

.intro-card h2, .dev-card h2 {
    color: #2c3e50;
    font-size: 2.2rem;
    margin-bottom: 20px;
    font-weight: 700;
    text-align: center;
}

.intro-card p, .dev-card p {
    font-size: 1.1rem;
    text-align: justify;
    color: #555;
    margin-bottom: 20px;
}

/* Features Section */
.features-section {
    margin-bottom: 60px;
}

.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 40px;
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.feature-card {
    background: white;
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 1px solid #e1e8ed;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transition: left 0.3s ease;
}

.feature-card:hover::before {
    left: 0;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.4rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.feature-card p {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
}

/* Topics Section */
.topics-section {
    margin-bottom: 60px;
}

.topics-section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 40px;
    font-weight: 700;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.topic-card {
    background: white;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border-left: 5px solid #667eea;
    position: relative;
}

.topic-card:hover {
    transform: translateX(8px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.topic-number {
    position: absolute;
    top: -10px;
    right: 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1rem;
}

.topic-card h3 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 12px;
    font-weight: 600;
    margin-top: 10px;
}

.topic-card p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Users Section */
.users-section {
    margin-bottom: 60px;
}

.users-section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 40px;
    font-weight: 700;
}

.users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.user-card {
    background: white;
    padding: 35px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 1px solid #e1e8ed;
}

.user-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(0,0,0,0.15);
}

.user-icon {
    font-size: 3.5rem;
    color: #764ba2;
    margin-bottom: 20px;
}

.user-card h3 {
    color: #2c3e50;
    font-size: 1.4rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.user-card p {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
}

/* Mission Section */
.mission-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 40px;
    border-radius: 20px;
    color: white;
    margin-bottom: 60px;
    position: relative;
    overflow: hidden;
}

.mission-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
}

.mission-content {
    position: relative;
    z-index: 1;
}

.mission-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 40px;
    font-weight: 700;
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.mission-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.mission-icon {
    font-size: 2rem;
    color: #ffd700;
    flex-shrink: 0;
}

.mission-item p {
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 0;
}

/* Development Section */
.development-section {
    margin-bottom: 40px;
}

.dev-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.highlight-item {
    background: #f8f9fa;
    padding: 15px 20px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    font-size: 1rem;
}

.highlight-item strong {
    color: #2c3e50;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 20px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-icon {
        font-size: 5rem;
    }
    
    .content-section {
        padding: 40px 15px;
    }
    
    .intro-card, .dev-card {
        padding: 25px;
    }
    
    .features-grid,
    .topics-grid,
    .users-grid {
        grid-template-columns: 1fr;
    }
    
    .mission-section {
        padding: 40px 20px;
    }
    
    .mission-grid {
        grid-template-columns: 1fr;
    }
    
    .mission-item {
        flex-direction: column;
        text-align: center;
    }
    
    .dev-highlights {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .features-section h2,
    .topics-section h2,
    .users-section h2,
    .mission-section h2 {
        font-size: 2rem;
    }
    
    .intro-card h2,
    .dev-card h2 {
        font-size: 1.8rem;
    }
}