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

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

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
}

.header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.header p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.creator-panel {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.section {
    margin-bottom: 2.5rem;
}

.section:last-child {
    margin-bottom: 0;
}

.section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #f0f0f0;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: #555;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.checkbox-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    font-weight: 400;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background 0.2s;
}

.checkbox-group label:hover {
    background: #f8f9fa;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

.flag-creator {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.flag-preview {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
}

.flag-display {
    width: 200px;
    height: 120px;
    border: 2px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    background: #f9f9f9;
}

.flag-stripe {
    height: 33.33%;
    width: 100%;
}

.pattern-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.pattern-btn {
    padding: 0.75rem 1rem;
    border: 2px solid #e0e0e0;
    background: white;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.pattern-btn:hover {
    border-color: #667eea;
    background: #f8f9ff;
}

.pattern-btn.active {
    border-color: #667eea;
    background: #667eea;
    color: white;
}

.color-palette {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.color-picker {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid transparent;
    transition: all 0.3s ease;
}

.color-picker:hover {
    transform: scale(1.1);
    border-color: #333;
}

.color-picker.selected {
    border-color: #333;
    transform: scale(1.1);
}

.preview-panel {
    position: sticky;
    top: 2rem;
}

.country-card {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.flag-container {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.flag {
    width: 150px;
    height: 100px;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
}

.country-info h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
    text-align: center;
}

.country-info p {
    margin-bottom: 0.5rem;
    color: #666;
}

.country-info span {
    font-weight: 500;
    color: #333;
}

.stats {
    margin-top: 2rem;
}

.stats h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
}

.stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stat {
    text-align: center;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: #666;
    margin-bottom: 0.25rem;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: #667eea;
}

.actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5a67d8;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #e0e0e0;
    color: #333;
}

.btn-secondary:hover {
    background: #d0d0d0;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 2.5rem;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: #333;
}

@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .header h1 {
        font-size: 2.5rem;
    }
    
    .checkbox-group {
        grid-template-columns: 1fr;
    }
}