* {
    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;
    padding: 20px;
}

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

h1 {
    text-align: center;
    color: white;
    margin-bottom: 30px;
    font-size: 2.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.controls {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.date-selector {
    display: flex;
    align-items: center;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.date-selector label {
    color: white;
    font-weight: 600;
}

.date-selector select {
    padding: 10px 15px;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    min-width: 120px;
}

.date-selector button {
    padding: 12px 25px;
    background: linear-gradient(45deg, #ff6b6b, #ee5a24);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(238, 90, 36, 0.4);
}

.date-selector button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(238, 90, 36, 0.6);
}

.loading {
    text-align: center;
    color: white;
    padding: 40px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.report-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.report-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    border-bottom: 2px solid #eee;
    padding-bottom: 20px;
}

.report-header h2 {
    color: #333;
    font-size: 1.8rem;
}

#downloadReport {
    padding: 10px 20px;
    background: linear-gradient(45deg, #4facfe, #00f2fe);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

#downloadReport:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 172, 254, 0.6);
}

.card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid #e0e0e0;
}

.card h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.3rem;
    border-left: 4px solid #667eea;
    padding-left: 15px;
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

th {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 15px;
    text-align: center;
    font-weight: 600;
    font-size: 14px;
}

td {
    padding: 12px 15px;
    text-align: center;
    border-bottom: 1px solid #eee;
    font-size: 13px;
}

tr:hover {
    background-color: #f8f9ff;
}

.total-row {
    background: linear-gradient(135deg, #ffecd2, #fcb69f);
    font-weight: 600;
}

.total-row td {
    border-bottom: none;
}

.error-message {
    background: rgba(255, 107, 107, 0.9);
    color: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    margin-top: 20px;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .date-selector {
        flex-direction: column;
        align-items: stretch;
    }
    
    .date-selector > * {
        margin-bottom: 10px;
    }
    
    .report-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    table {
        font-size: 12px;
    }
    
    th, td {
        padding: 8px;
    }
}