body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: Arial, sans-serif;
}

.app-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.splash-content {
    position: relative;
    width: 80%;
    max-width: 1200px;
    height: 80%;
}

.splash-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
}

.splash-actions {
    position: absolute;
    top: 20px;
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.action-btn {
    padding: 12px 20px;
    background-color: #2c3e50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

.action-btn:hover {
    background-color: #1a252f;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.toolbar {
    padding: 10px;
    background-color: #f8f9fa;
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.toolbar button {
    padding: 8px 16px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.excel-container {
    flex: 1;
    overflow: auto;
    border: 1px solid #ddd;
}

.file-input-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1001;
}

.modal-content {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    width: 400px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

.modal-actions button {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#cancelBtn {
    background-color: #e74c3c;
    color: white;
}

#confirmBtn {
    background-color: #2ecc71;
    color: white;
}