/* Landing Page Styles - Professional & Compact */

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.main-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1.5rem 2rem;
    border-radius: 0 0 20px 20px;
    margin: 1rem 1rem 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

.main-title {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.subtitle {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.developer-badge {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 0.5rem 1rem;
    border-radius: 15px;
    border: 1px solid #dee2e6;
    font-size: 0.8rem;
    font-weight: 600;
    color: #495057;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem;
}

.hero-section {
    text-align: center;
    margin-bottom: 2.5rem;
}

.hero-section h2 {
    font-size: 2rem;
    font-weight: 600;
    color: white;
    margin-bottom: 0.5rem;
}

.hero-section p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.option-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.option-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.option-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: #333;
}

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

.feature-list {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}

.feature-list li {
    font-size: 0.9rem;
    color: #555;
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
}

.action-btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.study-btn {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.study-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

.challenge-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.challenge-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* Learning Flow */
.learning-flow {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.learning-flow h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #333;
}

.flow-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-width: 120px;
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-bottom: 0.75rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.step-content h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: #333;
}

.step-content p {
    font-size: 0.8rem;
    color: #666;
}

.flow-arrow {
    font-size: 1.25rem;
    color: #667eea;
    font-weight: bold;
    margin: 0 0.5rem;
}

/* Action Section */
.action-section {
    margin-top: 2rem;
    text-align: center;
}

.ready-for-test {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.ready-for-test h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #333;
}

.large-btn {
    font-size: 1rem;
    padding: 0.875rem 2rem;
    transform: scale(1.05);
    border-radius: 12px;
    font-weight: 700;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.large-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

/* Footer */
.main-footer {
    background: rgba(255, 255, 255, 0.1);
    text-align: center;
    padding: 1rem 2rem;
    margin: 1rem;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.main-footer p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-header {
        margin: 0.5rem;
        padding: 1rem 1.5rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .main-title {
        font-size: 1.5rem;
    }
    
    .main-content {
        padding: 1.5rem;
    }
    
    .hero-section h2 {
        font-size: 1.5rem;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .option-card {
        padding: 1.5rem;
    }
    
    .flow-steps {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
    }
    
    .learning-flow {
        padding: 1.5rem;
    }
    
    .main-footer {
        margin: 0.5rem;
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 1.25rem;
    }
    
    .subtitle {
        font-size: 0.8rem;
    }
    
    .developer-badge {
        font-size: 0.75rem;
        padding: 0.4rem 0.8rem;
    }
    
    .hero-section h2 {
        font-size: 1.25rem;
    }
    
    .option-card {
        padding: 1.25rem;
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
}