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

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.lotto-section {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.lotto-section:hover {
    transform: translateY(-5px);
}

.lotto-section h2 {
    color: #4a5568;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.number-display {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    border-radius: 10px;
    padding: 25px;
    margin: 20px 0;
    text-align: center;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.number {
    background: white;
    color: #e53e3e;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    animation: bounceIn 0.6s ease;
}

@keyframes bounceIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.placeholder {
    color: rgba(255,255,255,0.8);
    font-style: italic;
    font-size: 1.1rem;
}

.button-group {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn.primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn.secondary {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.btn.secondary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(79, 172, 254, 0.4);
}

.btn.danger {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    color: white;
}

.btn.danger:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.4);
}

.custom-input {
    margin-bottom: 20px;
}

.custom-input label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #4a5568;
}

.custom-input input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.custom-input small {
    display: block;
    margin-top: 5px;
    color: #718096;
    font-size: 0.9rem;
}

.history-container {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.history-item {
    background: #f7fafc;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 10px;
    border-left: 4px solid #667eea;
}

.history-item .timestamp {
    font-size: 0.8rem;
    color: #718096;
    margin-bottom: 8px;
}

.history-item .numbers {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.history-item .number {
    width: 35px;
    height: 35px;
    font-size: 0.9rem;
}

.no-history {
    text-align: center;
    color: #718096;
    font-style: italic;
}

footer {
    text-align: center;
    color: white;
    margin-top: 40px;
    opacity: 0.8;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .lotto-section {
        padding: 20px;
    }
    
    .button-group {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 200px;
    }
    
    .number {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* 통계 분석 섹션 스타일 */
.stats-info {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    border-left: 4px solid #667eea;
}

.stats-loading {
    text-align: center;
    color: #718096;
    font-style: italic;
}

.stats-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.stat-item {
    background: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-item h4 {
    color: #4a5568;
    margin-bottom: 8px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-item .value {
    font-size: 1.2rem;
    font-weight: bold;
    color: #667eea;
}

.stat-item .numbers {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 8px;
}

.stat-item .number {
    width: 25px;
    height: 25px;
    font-size: 0.8rem;
    background: #667eea;
    color: white;
}

.recommendations-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.recommendation-item {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    border: 2px solid transparent;
}

.recommendation-item:hover {
    transform: translateY(-3px);
    border-color: #667eea;
}

.recommendation-item h3 {
    color: #4a5568;
    margin-bottom: 15px;
    font-size: 1.1rem;
    text-align: center;
}

.recommendation-item .description {
    color: #718096;
    font-size: 0.9rem;
    text-align: center;
    margin: 10px 0;
    line-height: 1.4;
}

.recommendation-item .number-display {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 15px 0;
    min-height: 60px;
}

.recommendation-item .number {
    width: 40px;
    height: 40px;
    font-size: 1rem;
}

.recommendation-item .btn {
    width: 100%;
    margin-top: 10px;
}

/* 스크롤바 스타일 */
.history-container::-webkit-scrollbar {
    width: 6px;
}

.history-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.history-container::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.history-container::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}