* {
    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;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
}

.container.dashboard {
    max-width: 1200px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.login-box h1 {
    text-align: center;
    color: #333;
    margin-bottom: 10px;
    font-size: 28px;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 10px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

.message {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: none;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
    display: block;
}

/* Dashboard Styles */
.dashboard {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e0e0e0;
}

.header h1 {
    font-size: 24px;
    color: #333;
}

.header .btn {
    width: auto;
    padding: 10px 20px;
    margin: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
    border-radius: 10px;
    color: white;
    text-align: center;
}

.stat-card.balance {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-card h3 {
    font-size: 14px;
    margin-bottom: 10px;
    opacity: 0.9;
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
}

.upload-section {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
}

.upload-section h2 {
    margin-bottom: 15px;
    color: #333;
}

.upload-instructions {
    background: white;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.6;
}

.upload-instructions code {
    background: #e0e0e0;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}

.progress-bar {
    background: #e0e0e0;
    border-radius: 8px;
    height: 30px;
    position: relative;
    margin-top: 20px;
    overflow: hidden;
}

.progress-fill {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100%;
    width: 0%;
    transition: width 0.3s;
}

#progressText {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #333;
    font-weight: bold;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .login-box {
        padding: 25px;
    }
    
    .dashboard {
        padding: 20px;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header h1 {
        font-size: 20px;
        margin-bottom: 10px;
    }
    
    .header .btn {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}